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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sql
import (
"context"
"database/sql/driver"
"errors"
"fmt"
"math/rand"
"reflect"
"runtime"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
)
func init() {
type dbConn struct {
db *DB
c *driverConn
}
freedFrom := make(map[dbConn]string)
var mu sync.Mutex
getFreedFrom := func(c dbConn) string {
mu.Lock()
defer mu.Unlock()
return freedFrom[c]
}
setFreedFrom := func(c dbConn, s string) {
mu.Lock()
defer mu.Unlock()
freedFrom[c] = s
}
putConnHook = func(db *DB, c *driverConn) {
idx := -1
for i, v := range db.freeConn {
if v == c {
idx = i
break
}
}
if idx >= 0 {
// print before panic, as panic may get lost due to conflicting panic
// (all goroutines asleep) elsewhere, since we might not unlock
// the mutex in freeConn here.
println("double free of conn. conflicts are:\nA) " + getFreedFrom(dbConn{db, c}) + "\n\nand\nB) " + stack())
panic("double free of conn.")
}
setFreedFrom(dbConn{db, c}, stack())
}
}
const fakeDBName = "foo"
var chrisBirthday = time.Unix(123456789, 0)
func newTestDB(t testing.TB, name string) *DB {
return newTestDBConnector(t, &fakeConnector{name: fakeDBName}, name)
}
func newTestDBConnector(t testing.TB, fc *fakeConnector, name string) *DB {
fc.name = fakeDBName
db := OpenDB(fc)
if _, err := db.Exec("WIPE"); err != nil {
t.Fatalf("exec wipe: %v", err)
}
if name == "people" {
exec(t, db, "CREATE|people|name=string,age=int32,photo=blob,dead=bool,bdate=datetime")
exec(t, db, "INSERT|people|name=Alice,age=?,photo=APHOTO", 1)
exec(t, db, "INSERT|people|name=Bob,age=?,photo=BPHOTO", 2)
exec(t, db, "INSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?", 3, chrisBirthday)
}
if name == "magicquery" {
// Magic table name and column, known by fakedb_test.go.
exec(t, db, "CREATE|magicquery|op=string,millis=int32")
exec(t, db, "INSERT|magicquery|op=sleep,millis=10")
}
return db
}
func TestOpenDB(t *testing.T) {
db := OpenDB(dsnConnector{dsn: fakeDBName, driver: fdriver})
if db.Driver() != fdriver {
t.Fatalf("OpenDB should return the driver of the Connector")
}
}
func TestDriverPanic(t *testing.T) {
// Test that if driver panics, database/sql does not deadlock.
db, err := Open("test", fakeDBName)
if err != nil {
t.Fatalf("Open: %v", err)
}
expectPanic := func(name string, f func()) {
defer func() {
err := recover()
if err == nil {
t.Fatalf("%s did not panic", name)
}
}()
f()
}
expectPanic("Exec Exec", func() { db.Exec("PANIC|Exec|WIPE") })
exec(t, db, "WIPE") // check not deadlocked
expectPanic("Exec NumInput", func() { db.Exec("PANIC|NumInput|WIPE") })
exec(t, db, "WIPE") // check not deadlocked
expectPanic("Exec Close", func() { db.Exec("PANIC|Close|WIPE") })
exec(t, db, "WIPE") // check not deadlocked
exec(t, db, "PANIC|Query|WIPE") // should run successfully: Exec does not call Query
exec(t, db, "WIPE") // check not deadlocked
exec(t, db, "CREATE|people|name=string,age=int32,photo=blob,dead=bool,bdate=datetime")
expectPanic("Query Query", func() { db.Query("PANIC|Query|SELECT|people|age,name|") })
expectPanic("Query NumInput", func() { db.Query("PANIC|NumInput|SELECT|people|age,name|") })
expectPanic("Query Close", func() {
rows, err := db.Query("PANIC|Close|SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
rows.Close()
})
db.Query("PANIC|Exec|SELECT|people|age,name|") // should run successfully: Query does not call Exec
exec(t, db, "WIPE") // check not deadlocked
}
func exec(t testing.TB, db *DB, query string, args ...interface{}) {
_, err := db.Exec(query, args...)
if err != nil {
t.Fatalf("Exec of %q: %v", query, err)
}
}
func closeDB(t testing.TB, db *DB) {
if e := recover(); e != nil {
fmt.Printf("Panic: %v\n", e)
panic(e)
}
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
db.mu.Lock()
for i, dc := range db.freeConn {
if n := len(dc.openStmt); n > 0 {
// Just a sanity check. This is legal in
// general, but if we make the tests clean up
// their statements first, then we can safely
// verify this is always zero here, and any
// other value is a leak.
t.Errorf("while closing db, freeConn %d/%d had %d open stmts; want 0", i, len(db.freeConn), n)
}
}
db.mu.Unlock()
err := db.Close()
if err != nil {
t.Fatalf("error closing DB: %v", err)
}
var numOpen int
if !waitCondition(5*time.Second, 5*time.Millisecond, func() bool {
numOpen = db.numOpenConns()
return numOpen == 0
}) {
t.Fatalf("%d connections still open after closing DB", numOpen)
}
}
// numPrepares assumes that db has exactly 1 idle conn and returns
// its count of calls to Prepare
func numPrepares(t *testing.T, db *DB) int {
if n := len(db.freeConn); n != 1 {
t.Fatalf("free conns = %d; want 1", n)
}
return db.freeConn[0].ci.(*fakeConn).numPrepare
}
func (db *DB) numDeps() int {
db.mu.Lock()
defer db.mu.Unlock()
return len(db.dep)
}
// Dependencies are closed via a goroutine, so this polls waiting for
// numDeps to fall to want, waiting up to d.
func (db *DB) numDepsPollUntil(want int, d time.Duration) int {
deadline := time.Now().Add(d)
for {
n := db.numDeps()
if n <= want || time.Now().After(deadline) {
return n
}
time.Sleep(50 * time.Millisecond)
}
}
func (db *DB) numFreeConns() int {
db.mu.Lock()
defer db.mu.Unlock()
return len(db.freeConn)
}
func (db *DB) numOpenConns() int {
db.mu.Lock()
defer db.mu.Unlock()
return db.numOpen
}
// clearAllConns closes all connections in db.
func (db *DB) clearAllConns(t *testing.T) {
db.SetMaxIdleConns(0)
if g, w := db.numFreeConns(), 0; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(0, time.Second); n > 0 {
t.Errorf("number of dependencies = %d; expected 0", n)
db.dumpDeps(t)
}
}
func (db *DB) dumpDeps(t *testing.T) {
for fc := range db.dep {
db.dumpDep(t, 0, fc, map[finalCloser]bool{})
}
}
func (db *DB) dumpDep(t *testing.T, depth int, dep finalCloser, seen map[finalCloser]bool) {
seen[dep] = true
indent := strings.Repeat(" ", depth)
ds := db.dep[dep]
for k := range ds {
t.Logf("%s%T (%p) waiting for -> %T (%p)", indent, dep, dep, k, k)
if fc, ok := k.(finalCloser); ok {
if !seen[fc] {
db.dumpDep(t, depth+1, fc, seen)
}
}
}
}
func TestQuery(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
type row struct {
age int
name string
}
got := []row{}
for rows.Next() {
var r row
err = rows.Scan(&r.age, &r.name)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got = append(got, r)
}
err = rows.Err()
if err != nil {
t.Fatalf("Err: %v", err)
}
want := []row{
{age: 1, name: "Alice"},
{age: 2, name: "Bob"},
{age: 3, name: "Chris"},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got, want)
}
// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
if n := db.numFreeConns(); n != 1 {
t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
// TestQueryContext tests canceling the context while scanning the rows.
func TestQueryContext(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
rows, err := db.QueryContext(ctx, "SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
type row struct {
age int
name string
}
got := []row{}
index := 0
for rows.Next() {
if index == 2 {
cancel()
waitForRowsClose(t, rows, 5*time.Second)
}
var r row
err = rows.Scan(&r.age, &r.name)
if err != nil {
if index == 2 {
break
}
t.Fatalf("Scan: %v", err)
}
if index == 2 && err == nil {
t.Fatal("expected an error on last scan")
}
got = append(got, r)
index++
}
select {
case <-ctx.Done():
if err := ctx.Err(); err != context.Canceled {
t.Fatalf("context err = %v; want context.Canceled", err)
}
default:
t.Fatalf("context err = nil; want context.Canceled")
}
want := []row{
{age: 1, name: "Alice"},
{age: 2, name: "Bob"},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got, want)
}
// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
waitForRowsClose(t, rows, 5*time.Second)
waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
func waitCondition(waitFor, checkEvery time.Duration, fn func() bool) bool {
deadline := time.Now().Add(waitFor)
for time.Now().Before(deadline) {
if fn() {
return true
}
time.Sleep(checkEvery)
}
return false
}
// waitForFree checks db.numFreeConns until either it equals want or
// the maxWait time elapses.
func waitForFree(t *testing.T, db *DB, maxWait time.Duration, want int) {
var numFree int
if !waitCondition(maxWait, 5*time.Millisecond, func() bool {
numFree = db.numFreeConns()
return numFree == want
}) {
t.Fatalf("free conns after hitting EOF = %d; want %d", numFree, want)
}
}
func waitForRowsClose(t *testing.T, rows *Rows, maxWait time.Duration) {
if !waitCondition(maxWait, 5*time.Millisecond, func() bool {
rows.closemu.RLock()
defer rows.closemu.RUnlock()
return rows.closed
}) {
t.Fatal("failed to close rows")
}
}
// TestQueryContextWait ensures that rows and all internal statements are closed when
// a query context is closed during execution.
func TestQueryContextWait(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
// TODO(kardianos): convert this from using a timeout to using an explicit
// cancel when the query signals that is is "executing" the query.
ctx, cancel := context.WithTimeout(context.Background(), 300*time.Millisecond)
defer cancel()
// This will trigger the *fakeConn.Prepare method which will take time
// performing the query. The ctxDriverPrepare func will check the context
// after this and close the rows and return an error.
_, err := db.QueryContext(ctx, "WAIT|1s|SELECT|people|age,name|")
if err != context.DeadlineExceeded {
t.Fatalf("expected QueryContext to error with context deadline exceeded but returned %v", err)
}
// Verify closed rows connection after error condition.
waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
// TODO(kardianos): if the context timeouts before the db.QueryContext
// executes this check may fail. After adjusting how the context
// is canceled above revert this back to a Fatal error.
t.Logf("executed %d Prepare statements; want 1", prepares)
}
}
// TestTxContextWait tests the transaction behavior when the tx context is canceled
// during execution of the query.
func TestTxContextWait(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Millisecond)
defer cancel()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
// Guard against the context being canceled before BeginTx completes.
if err == context.DeadlineExceeded {
t.Skip("tx context canceled prior to first use")
}
t.Fatal(err)
}
// This will trigger the *fakeConn.Prepare method which will take time
// performing the query. The ctxDriverPrepare func will check the context
// after this and close the rows and return an error.
_, err = tx.QueryContext(ctx, "WAIT|1s|SELECT|people|age,name|")
if err != context.DeadlineExceeded {
t.Fatalf("expected QueryContext to error with context deadline exceeded but returned %v", err)
}
waitForFree(t, db, 5*time.Second, 0)
}
// TestUnsupportedOptions checks that the database fails when a driver that
// doesn't implement ConnBeginTx is used with non-default options and an
// un-cancellable context.
func TestUnsupportedOptions(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
_, err := db.BeginTx(context.Background(), &TxOptions{
Isolation: LevelSerializable, ReadOnly: true,
})
if err == nil {
t.Fatal("expected error when using unsupported options, got nil")
}
}
func TestMultiResultSetQuery(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
rows, err := db.Query("SELECT|people|age,name|;SELECT|people|name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
type row1 struct {
age int
name string
}
type row2 struct {
name string
}
got1 := []row1{}
for rows.Next() {
var r row1
err = rows.Scan(&r.age, &r.name)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got1 = append(got1, r)
}
err = rows.Err()
if err != nil {
t.Fatalf("Err: %v", err)
}
want1 := []row1{
{age: 1, name: "Alice"},
{age: 2, name: "Bob"},
{age: 3, name: "Chris"},
}
if !reflect.DeepEqual(got1, want1) {
t.Errorf("mismatch.\n got1: %#v\nwant: %#v", got1, want1)
}
if !rows.NextResultSet() {
t.Errorf("expected another result set")
}
got2 := []row2{}
for rows.Next() {
var r row2
err = rows.Scan(&r.name)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got2 = append(got2, r)
}
err = rows.Err()
if err != nil {
t.Fatalf("Err: %v", err)
}
want2 := []row2{
{name: "Alice"},
{name: "Bob"},
{name: "Chris"},
}
if !reflect.DeepEqual(got2, want2) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got2, want2)
}
if rows.NextResultSet() {
t.Errorf("expected no more result sets")
}
// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
func TestQueryNamedArg(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
rows, err := db.Query(
// Ensure the name and age parameters only match on placeholder name, not position.
"SELECT|people|age,name|name=?name,age=?age",
Named("age", 2),
Named("name", "Bob"),
)
if err != nil {
t.Fatalf("Query: %v", err)
}
type row struct {
age int
name string
}
got := []row{}
for rows.Next() {
var r row
err = rows.Scan(&r.age, &r.name)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got = append(got, r)
}
err = rows.Err()
if err != nil {
t.Fatalf("Err: %v", err)
}
want := []row{
{age: 2, name: "Bob"},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got, want)
}
// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
if n := db.numFreeConns(); n != 1 {
t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
func TestPoolExhaustOnCancel(t *testing.T) {
if testing.Short() {
t.Skip("long test")
}
max := 3
var saturate, saturateDone sync.WaitGroup
saturate.Add(max)
saturateDone.Add(max)
donePing := make(chan bool)
state := 0
// waiter will be called for all queries, including
// initial setup queries. The state is only assigned when no
// no queries are made.
//
// Only allow the first batch of queries to finish once the
// second batch of Ping queries have finished.
waiter := func(ctx context.Context) {
switch state {
case 0:
// Nothing. Initial database setup.
case 1:
saturate.Done()
select {
case <-ctx.Done():
case <-donePing:
}
case 2:
}
}
db := newTestDBConnector(t, &fakeConnector{waiter: waiter}, "people")
defer closeDB(t, db)
db.SetMaxOpenConns(max)
// First saturate the connection pool.
// Then start new requests for a connection that is cancelled after it is requested.
state = 1
for i := 0; i < max; i++ {
go func() {
rows, err := db.Query("SELECT|people|name,photo|")
if err != nil {
t.Fatalf("Query: %v", err)
}
rows.Close()
saturateDone.Done()
}()
}
saturate.Wait()
state = 2
// Now cancel the request while it is waiting.
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
for i := 0; i < max; i++ {
ctxReq, cancelReq := context.WithCancel(ctx)
go func() {
time.Sleep(100 * time.Millisecond)
cancelReq()
}()
err := db.PingContext(ctxReq)
if err != context.Canceled {
t.Fatalf("PingContext (Exhaust): %v", err)
}
}
close(donePing)
saturateDone.Wait()
// Now try to open a normal connection.
err := db.PingContext(ctx)
if err != nil {
t.Fatalf("PingContext (Normal): %v", err)
}
}
func TestRowsColumns(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
cols, err := rows.Columns()
if err != nil {
t.Fatalf("Columns: %v", err)
}
want := []string{"age", "name"}
if !reflect.DeepEqual(cols, want) {
t.Errorf("got %#v; want %#v", cols, want)
}
if err := rows.Close(); err != nil {
t.Errorf("error closing rows: %s", err)
}
}
func TestRowsColumnTypes(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
tt, err := rows.ColumnTypes()
if err != nil {
t.Fatalf("ColumnTypes: %v", err)
}
types := make([]reflect.Type, len(tt))
for i, tp := range tt {
st := tp.ScanType()
if st == nil {
t.Errorf("scantype is null for column %q", tp.Name())
continue
}
types[i] = st
}
values := make([]interface{}, len(tt))
for i := range values {
values[i] = reflect.New(types[i]).Interface()
}
ct := 0
for rows.Next() {
err = rows.Scan(values...)
if err != nil {
t.Fatalf("failed to scan values in %v", err)
}
if ct == 1 {
if age := *values[0].(*int32); age != 2 {
t.Errorf("Expected 2, got %v", age)
}
if name := *values[1].(*string); name != "Bob" {
t.Errorf("Expected Bob, got %v", name)
}
}
ct++
}
if ct != 3 {
t.Errorf("expected 3 rows, got %d", ct)
}
if err := rows.Close(); err != nil {
t.Errorf("error closing rows: %s", err)
}
}
func TestQueryRow(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name string
var age int
var birthday time.Time
err := db.QueryRow("SELECT|people|age,name|age=?", 3).Scan(&age)
if err == nil || !strings.Contains(err.Error(), "expected 2 destination arguments") {
t.Errorf("expected error from wrong number of arguments; actually got: %v", err)
}
err = db.QueryRow("SELECT|people|bdate|age=?", 3).Scan(&birthday)
if err != nil || !birthday.Equal(chrisBirthday) {
t.Errorf("chris birthday = %v, err = %v; want %v", birthday, err, chrisBirthday)
}
err = db.QueryRow("SELECT|people|age,name|age=?", 2).Scan(&age, &name)
if err != nil {
t.Fatalf("age QueryRow+Scan: %v", err)
}
if name != "Bob" {
t.Errorf("expected name Bob, got %q", name)
}
if age != 2 {
t.Errorf("expected age 2, got %d", age)
}
err = db.QueryRow("SELECT|people|age,name|name=?", "Alice").Scan(&age, &name)
if err != nil {
t.Fatalf("name QueryRow+Scan: %v", err)
}
if name != "Alice" {
t.Errorf("expected name Alice, got %q", name)
}
if age != 1 {
t.Errorf("expected age 1, got %d", age)
}
var photo []byte
err = db.QueryRow("SELECT|people|photo|name=?", "Alice").Scan(&photo)
if err != nil {
t.Fatalf("photo QueryRow+Scan: %v", err)
}
want := []byte("APHOTO")
if !reflect.DeepEqual(photo, want) {
t.Errorf("photo = %q; want %q", photo, want)
}
}
func TestTxRollbackCommitErr(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
err = tx.Rollback()
if err != nil {
t.Errorf("expected nil error from Rollback; got %v", err)
}
err = tx.Commit()
if err != ErrTxDone {
t.Errorf("expected %q from Commit; got %q", ErrTxDone, err)
}
tx, err = db.Begin()
if err != nil {
t.Fatal(err)
}
err = tx.Commit()
if err != nil {
t.Errorf("expected nil error from Commit; got %v", err)
}
err = tx.Rollback()
if err != ErrTxDone {
t.Errorf("expected %q from Rollback; got %q", ErrTxDone, err)
}
}
func TestStatementErrorAfterClose(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
err = stmt.Close()
if err != nil {
t.Fatalf("Close: %v", err)
}
var name string
err = stmt.QueryRow("foo").Scan(&name)
if err == nil {
t.Errorf("expected error from QueryRow.Scan after Stmt.Close")
}
}
func TestStatementQueryRow(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
defer stmt.Close()
var age int
for n, tt := range []struct {
name string
want int
}{
{"Alice", 1},
{"Bob", 2},
{"Chris", 3},
} {
if err := stmt.QueryRow(tt.name).Scan(&age); err != nil {
t.Errorf("%d: on %q, QueryRow/Scan: %v", n, tt.name, err)
} else if age != tt.want {
t.Errorf("%d: age=%d, want %d", n, age, tt.want)
}
}
}
type stubDriverStmt struct {
err error
}
func (s stubDriverStmt) Close() error {
return s.err
}
func (s stubDriverStmt) NumInput() int {
return -1
}
func (s stubDriverStmt) Exec(args []driver.Value) (driver.Result, error) {
return nil, nil
}
func (s stubDriverStmt) Query(args []driver.Value) (driver.Rows, error) {
return nil, nil
}
// golang.org/issue/12798
func TestStatementClose(t *testing.T) {
want := errors.New("STMT ERROR")
tests := []struct {
stmt *Stmt
msg string
}{
{&Stmt{stickyErr: want}, "stickyErr not propagated"},
{&Stmt{cg: &Tx{}, cgds: &driverStmt{Locker: &sync.Mutex{}, si: stubDriverStmt{want}}}, "driverStmt.Close() error not propagated"},
}
for _, test := range tests {
if err := test.stmt.Close(); err != want {
t.Errorf("%s. Got stmt.Close() = %v, want = %v", test.msg, err, want)
}
}
}
// golang.org/issue/3734
func TestStatementQueryRowConcurrent(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
defer stmt.Close()
const n = 10
ch := make(chan error, n)
for i := 0; i < n; i++ {
go func() {
var age int
err := stmt.QueryRow("Alice").Scan(&age)
if err == nil && age != 1 {
err = fmt.Errorf("unexpected age %d", age)
}
ch <- err
}()
}
for i := 0; i < n; i++ {
if err := <-ch; err != nil {
t.Error(err)
}
}
}
// just a test of fakedb itself
func TestBogusPreboundParameters(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
_, err := db.Prepare("INSERT|t1|name=?,age=bogusconversion")
if err == nil {
t.Fatalf("expected error")
}
if err.Error() != `fakedb: invalid conversion to int32 from "bogusconversion"` {
t.Errorf("unexpected error: %v", err)
}
}
func TestExec(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Errorf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
type execTest struct {
args []interface{}
wantErr string
}
execTests := []execTest{
// Okay:
{[]interface{}{"Brad", 31}, ""},
{[]interface{}{"Brad", int64(31)}, ""},
{[]interface{}{"Bob", "32"}, ""},
{[]interface{}{7, 9}, ""},
// Invalid conversions:
{[]interface{}{"Brad", int64(0xFFFFFFFF)}, "sql: converting argument $2 type: sql/driver: value 4294967295 overflows int32"},
{[]interface{}{"Brad", "strconv fail"}, `sql: converting argument $2 type: sql/driver: value "strconv fail" can't be converted to int32`},
// Wrong number of args:
{[]interface{}{}, "sql: expected 2 arguments, got 0"},
{[]interface{}{1, 2, 3}, "sql: expected 2 arguments, got 3"},
}
for n, et := range execTests {
_, err := stmt.Exec(et.args...)
errStr := ""
if err != nil {
errStr = err.Error()
}
if errStr != et.wantErr {
t.Errorf("stmt.Execute #%d: for %v, got error %q, want error %q",
n, et.args, errStr, et.wantErr)
}
}
}
func TestTxPrepare(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
stmt, err := tx.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
_, err = stmt.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
// Commit() should have closed the statement
if !stmt.closed {
t.Fatal("Stmt not closed after Commit")
}
}
func TestTxStmt(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs := tx.Stmt(stmt)
defer txs.Close()
_, err = txs.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
// Commit() should have closed the statement
if !txs.closed {
t.Fatal("Stmt not closed after Commit")
}
}
func TestTxStmtPreparedOnce(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32")
prepares0 := numPrepares(t, db)
// db.Prepare increments numPrepares.
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs1 := tx.Stmt(stmt)
txs2 := tx.Stmt(stmt)
_, err = txs1.Exec("Go", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
txs1.Close()
_, err = txs2.Exec("Gopher", 8)
if err != nil {
t.Fatalf("Exec = %v", err)
}
txs2.Close()
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
func TestTxStmtClosedRePrepares(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32")
prepares0 := numPrepares(t, db)
// db.Prepare increments numPrepares.
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
err = stmt.Close()
if err != nil {
t.Fatalf("stmt.Close() = %v", err)
}
// tx.Stmt increments numPrepares because stmt is closed.
txs := tx.Stmt(stmt)
if txs.stickyErr != nil {
t.Fatal(txs.stickyErr)
}
if txs.parentStmt != nil {
t.Fatal("expected nil parentStmt")
}
_, err = txs.Exec(`Eric`, 82)
if err != nil {
t.Fatalf("txs.Exec = %v", err)
}
err = txs.Close()
if err != nil {
t.Fatalf("txs.Close = %v", err)
}
tx.Rollback()
if prepares := numPrepares(t, db) - prepares0; prepares != 2 {
t.Errorf("executed %d Prepare statements; want 2", prepares)
}
}
func TestParentStmtOutlivesTxStmt(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32")
// Make sure everything happens on the same connection.
db.SetMaxOpenConns(1)
prepares0 := numPrepares(t, db)
// db.Prepare increments numPrepares.
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs := tx.Stmt(stmt)
if len(stmt.css) != 1 {
t.Fatalf("len(stmt.css) = %v; want 1", len(stmt.css))
}
err = txs.Close()
if err != nil {
t.Fatalf("txs.Close() = %v", err)
}
err = tx.Rollback()
if err != nil {
t.Fatalf("tx.Rollback() = %v", err)
}
// txs must not be valid.
_, err = txs.Exec("Suzan", 30)
if err == nil {
t.Fatalf("txs.Exec(), expected err")
}
// Stmt must still be valid.
_, err = stmt.Exec("Janina", 25)
if err != nil {
t.Fatalf("stmt.Exec() = %v", err)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
// Test that tx.Stmt called with a statement already
// associated with tx as argument re-prepares the same
// statement again.
func TestTxStmtFromTxStmtRePrepares(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32")
prepares0 := numPrepares(t, db)
// db.Prepare increments numPrepares.
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs1 := tx.Stmt(stmt)
// tx.Stmt(txs1) increments numPrepares because txs1 already
// belongs to a transaction (albeit the same transaction).
txs2 := tx.Stmt(txs1)
if txs2.stickyErr != nil {
t.Fatal(txs2.stickyErr)
}
if txs2.parentStmt != nil {
t.Fatal("expected nil parentStmt")
}
_, err = txs2.Exec(`Eric`, 82)
if err != nil {
t.Fatal(err)
}
err = txs1.Close()
if err != nil {
t.Fatalf("txs1.Close = %v", err)
}
err = txs2.Close()
if err != nil {
t.Fatalf("txs1.Close = %v", err)
}
err = tx.Rollback()
if err != nil {
t.Fatalf("tx.Rollback = %v", err)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 2 {
t.Errorf("executed %d Prepare statements; want 2", prepares)
}
}
// Issue: https://golang.org/issue/2784
// This test didn't fail before because we got lucky with the fakedb driver.
// It was failing, and now not, in github.com/bradfitz/go-sql-test
func TestTxQuery(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
exec(t, db, "INSERT|t1|name=Alice")
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
r, err := tx.Query("SELECT|t1|name|")
if err != nil {
t.Fatal(err)
}
defer r.Close()
if !r.Next() {
if r.Err() != nil {
t.Fatal(r.Err())
}
t.Fatal("expected one row")
}
var x string
err = r.Scan(&x)
if err != nil {
t.Fatal(err)
}
}
func TestTxQueryInvalid(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
_, err = tx.Query("SELECT|t1|name|")
if err == nil {
t.Fatal("Error expected")
}
}
// Tests fix for issue 4433, that retries in Begin happen when
// conn.Begin() returns ErrBadConn
func TestTxErrBadConn(t *testing.T) {
db, err := Open("test", fakeDBName+";badConn")
if err != nil {
t.Fatalf("Open: %v", err)
}
if _, err := db.Exec("WIPE"); err != nil {
t.Fatalf("exec wipe: %v", err)
}
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs := tx.Stmt(stmt)
defer txs.Close()
_, err = txs.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
}
func TestConnQuery(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal(err)
}
conn.dc.ci.(*fakeConn).skipDirtySession = true
defer conn.Close()
var name string
err = conn.QueryRowContext(ctx, "SELECT|people|name|age=?", 3).Scan(&name)
if err != nil {
t.Fatal(err)
}
if name != "Chris" {
t.Fatalf("unexpected result, got %q want Chris", name)
}
err = conn.PingContext(ctx)
if err != nil {
t.Fatal(err)
}
}
func TestConnTx(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal(err)
}
conn.dc.ci.(*fakeConn).skipDirtySession = true
defer conn.Close()
tx, err := conn.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
insertName, insertAge := "Nancy", 33
_, err = tx.ExecContext(ctx, "INSERT|people|name=?,age=?,photo=APHOTO", insertName, insertAge)
if err != nil {
t.Fatal(err)
}
err = tx.Commit()
if err != nil {
t.Fatal(err)
}
var selectName string
err = conn.QueryRowContext(ctx, "SELECT|people|name|age=?", insertAge).Scan(&selectName)
if err != nil {
t.Fatal(err)
}
if selectName != insertName {
t.Fatalf("got %q want %q", selectName, insertName)
}
}
// Tests fix for issue 2542, that we release a lock when querying on
// a closed connection.
func TestIssue2542Deadlock(t *testing.T) {
db := newTestDB(t, "people")
closeDB(t, db)
for i := 0; i < 2; i++ {
_, err := db.Query("SELECT|people|age,name|")
if err == nil {
t.Fatalf("expected error")
}
}
}
// From golang.org/issue/3865
func TestCloseStmtBeforeRows(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
s, err := db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
r, err := s.Query()
if err != nil {
s.Close()
t.Fatal(err)
}
err = s.Close()
if err != nil {
t.Fatal(err)
}
r.Close()
}
// Tests fix for issue 2788, that we bind nil to a []byte if the
// value in the column is sql null
func TestNullByteSlice(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t|id=int32,name=nullstring")
exec(t, db, "INSERT|t|id=10,name=?", nil)
var name []byte
err := db.QueryRow("SELECT|t|name|id=?", 10).Scan(&name)
if err != nil {
t.Fatal(err)
}
if name != nil {
t.Fatalf("name []byte should be nil for null column value, got: %#v", name)
}
exec(t, db, "INSERT|t|id=11,name=?", "bob")
err = db.QueryRow("SELECT|t|name|id=?", 11).Scan(&name)
if err != nil {
t.Fatal(err)
}
if string(name) != "bob" {
t.Fatalf("name []byte should be bob, got: %q", string(name))
}
}
func TestPointerParamsAndScans(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t|id=int32,name=nullstring")
bob := "bob"
var name *string
name = &bob
exec(t, db, "INSERT|t|id=10,name=?", name)
name = nil
exec(t, db, "INSERT|t|id=20,name=?", name)
err := db.QueryRow("SELECT|t|name|id=?", 10).Scan(&name)
if err != nil {
t.Fatalf("querying id 10: %v", err)
}
if name == nil {
t.Errorf("id 10's name = nil; want bob")
} else if *name != "bob" {
t.Errorf("id 10's name = %q; want bob", *name)
}
err = db.QueryRow("SELECT|t|name|id=?", 20).Scan(&name)
if err != nil {
t.Fatalf("querying id 20: %v", err)
}
if name != nil {
t.Errorf("id 20 = %q; want nil", *name)
}
}
func TestQueryRowClosingStmt(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name string
var age int
err := db.QueryRow("SELECT|people|age,name|age=?", 3).Scan(&age, &name)
if err != nil {
t.Fatal(err)
}
if len(db.freeConn) != 1 {
t.Fatalf("expected 1 free conn")
}
fakeConn := db.freeConn[0].ci.(*fakeConn)
if made, closed := fakeConn.stmtsMade, fakeConn.stmtsClosed; made != closed {
t.Errorf("statement close mismatch: made %d, closed %d", made, closed)
}
}
var atomicRowsCloseHook atomic.Value // of func(*Rows, *error)
func init() {
rowsCloseHook = func() func(*Rows, *error) {
fn, _ := atomicRowsCloseHook.Load().(func(*Rows, *error))
return fn
}
}
func setRowsCloseHook(fn func(*Rows, *error)) {
if fn == nil {
// Can't change an atomic.Value back to nil, so set it to this
// no-op func instead.
fn = func(*Rows, *error) {}
}
atomicRowsCloseHook.Store(fn)
}
// Test issue 6651
func TestIssue6651(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var v string
want := "error in rows.Next"
rowsCursorNextHook = func(dest []driver.Value) error {
return fmt.Errorf(want)
}
defer func() { rowsCursorNextHook = nil }()
err := db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
}
rowsCursorNextHook = nil
want = "error in rows.Close"
setRowsCloseHook(func(rows *Rows, err *error) {
*err = fmt.Errorf(want)
})
defer setRowsCloseHook(nil)
err = db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
}
}
type nullTestRow struct {
nullParam interface{}
notNullParam interface{}
scanNullVal interface{}
}
type nullTestSpec struct {
nullType string
notNullType string
rows [6]nullTestRow
}
func TestNullStringParam(t *testing.T) {
spec := nullTestSpec{"nullstring", "string", [6]nullTestRow{
{NullString{"aqua", true}, "", NullString{"aqua", true}},
{NullString{"brown", false}, "", NullString{"", false}},
{"chartreuse", "", NullString{"chartreuse", true}},
{NullString{"darkred", true}, "", NullString{"darkred", true}},
{NullString{"eel", false}, "", NullString{"", false}},
{"foo", NullString{"black", false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullInt64Param(t *testing.T) {
spec := nullTestSpec{"nullint64", "int64", [6]nullTestRow{
{NullInt64{31, true}, 1, NullInt64{31, true}},
{NullInt64{-22, false}, 1, NullInt64{0, false}},
{22, 1, NullInt64{22, true}},
{NullInt64{33, true}, 1, NullInt64{33, true}},
{NullInt64{222, false}, 1, NullInt64{0, false}},
{0, NullInt64{31, false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullFloat64Param(t *testing.T) {
spec := nullTestSpec{"nullfloat64", "float64", [6]nullTestRow{
{NullFloat64{31.2, true}, 1, NullFloat64{31.2, true}},
{NullFloat64{13.1, false}, 1, NullFloat64{0, false}},
{-22.9, 1, NullFloat64{-22.9, true}},
{NullFloat64{33.81, true}, 1, NullFloat64{33.81, true}},
{NullFloat64{222, false}, 1, NullFloat64{0, false}},
{10, NullFloat64{31.2, false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullBoolParam(t *testing.T) {
spec := nullTestSpec{"nullbool", "bool", [6]nullTestRow{
{NullBool{false, true}, true, NullBool{false, true}},
{NullBool{true, false}, false, NullBool{false, false}},
{true, true, NullBool{true, true}},
{NullBool{true, true}, false, NullBool{true, true}},
{NullBool{true, false}, true, NullBool{false, false}},
{true, NullBool{true, false}, nil},
}}
nullTestRun(t, spec)
}
func nullTestRun(t *testing.T, spec nullTestSpec) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, fmt.Sprintf("CREATE|t|id=int32,name=string,nullf=%s,notnullf=%s", spec.nullType, spec.notNullType))
// Inserts with db.Exec:
exec(t, db, "INSERT|t|id=?,name=?,nullf=?,notnullf=?", 1, "alice", spec.rows[0].nullParam, spec.rows[0].notNullParam)
exec(t, db, "INSERT|t|id=?,name=?,nullf=?,notnullf=?", 2, "bob", spec.rows[1].nullParam, spec.rows[1].notNullParam)
// Inserts with a prepared statement:
stmt, err := db.Prepare("INSERT|t|id=?,name=?,nullf=?,notnullf=?")
if err != nil {
t.Fatalf("prepare: %v", err)
}
defer stmt.Close()
if _, err := stmt.Exec(3, "chris", spec.rows[2].nullParam, spec.rows[2].notNullParam); err != nil {
t.Errorf("exec insert chris: %v", err)
}
if _, err := stmt.Exec(4, "dave", spec.rows[3].nullParam, spec.rows[3].notNullParam); err != nil {
t.Errorf("exec insert dave: %v", err)
}
if _, err := stmt.Exec(5, "eleanor", spec.rows[4].nullParam, spec.rows[4].notNullParam); err != nil {
t.Errorf("exec insert eleanor: %v", err)
}
// Can't put null val into non-null col
if _, err := stmt.Exec(6, "bob", spec.rows[5].nullParam, spec.rows[5].notNullParam); err == nil {
t.Errorf("expected error inserting nil val with prepared statement Exec")
}
_, err = db.Exec("INSERT|t|id=?,name=?,nullf=?", 999, nil, nil)
if err == nil {
// TODO: this test fails, but it's just because
// fakeConn implements the optional Execer interface,
// so arguably this is the correct behavior. But
// maybe I should flesh out the fakeConn.Exec
// implementation so this properly fails.
// t.Errorf("expected error inserting nil name with Exec")
}
paramtype := reflect.TypeOf(spec.rows[0].nullParam)
bindVal := reflect.New(paramtype).Interface()
for i := 0; i < 5; i++ {
id := i + 1
if err := db.QueryRow("SELECT|t|nullf|id=?", id).Scan(bindVal); err != nil {
t.Errorf("id=%d Scan: %v", id, err)
}
bindValDeref := reflect.ValueOf(bindVal).Elem().Interface()
if !reflect.DeepEqual(bindValDeref, spec.rows[i].scanNullVal) {
t.Errorf("id=%d got %#v, want %#v", id, bindValDeref, spec.rows[i].scanNullVal)
}
}
}
// golang.org/issue/4859
func TestQueryRowNilScanDest(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name *string // nil pointer
err := db.QueryRow("SELECT|people|name|").Scan(name)
want := "sql: Scan error on column index 0: destination pointer is nil"
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err.Error(), want)
}
}
func TestIssue4902(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
driver := db.Driver().(*fakeDriver)
opens0 := driver.openCount
var stmt *Stmt
var err error
for i := 0; i < 10; i++ {
stmt, err = db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
err = stmt.Close()
if err != nil {
t.Fatal(err)
}
}
opens := driver.openCount - opens0
if opens > 1 {
t.Errorf("opens = %d; want <= 1", opens)
t.Logf("db = %#v", db)
t.Logf("driver = %#v", driver)
t.Logf("stmt = %#v", stmt)
}
}
// Issue 3857
// This used to deadlock.
func TestSimultaneousQueries(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
r1, err := tx.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer r1.Close()
r2, err := tx.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer r2.Close()
}
func TestMaxIdleConns(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
if got := len(db.freeConn); got != 1 {
t.Errorf("freeConns = %d; want 1", got)
}
db.SetMaxIdleConns(0)
if got := len(db.freeConn); got != 0 {
t.Errorf("freeConns after set to zero = %d; want 0", got)
}
tx, err = db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
if got := len(db.freeConn); got != 0 {
t.Errorf("freeConns = %d; want 0", got)
}
}
func TestMaxOpenConns(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
db := newTestDB(t, "magicquery")
defer closeDB(t, db)
driver := db.Driver().(*fakeDriver)
// Force the number of open connections to 0 so we can get an accurate
// count for the test
db.clearAllConns(t)
driver.mu.Lock()
opens0 := driver.openCount
closes0 := driver.closeCount
driver.mu.Unlock()
db.SetMaxIdleConns(10)
db.SetMaxOpenConns(10)
stmt, err := db.Prepare("SELECT|magicquery|op|op=?,millis=?")
if err != nil {
t.Fatal(err)
}
// Start 50 parallel slow queries.
const (
nquery = 50
sleepMillis = 25
nbatch = 2
)
var wg sync.WaitGroup
for batch := 0; batch < nbatch; batch++ {
for i := 0; i < nquery; i++ {
wg.Add(1)
go func() {
defer wg.Done()
var op string
if err := stmt.QueryRow("sleep", sleepMillis).Scan(&op); err != nil && err != ErrNoRows {
t.Error(err)
}
}()
}
// Sleep for twice the expected length of time for the
// batch of 50 queries above to finish before starting
// the next round.
time.Sleep(2 * sleepMillis * time.Millisecond)
}
wg.Wait()
if g, w := db.numFreeConns(), 10; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(20, time.Second); n > 20 {
t.Errorf("number of dependencies = %d; expected <= 20", n)
db.dumpDeps(t)
}
driver.mu.Lock()
opens := driver.openCount - opens0
closes := driver.closeCount - closes0
driver.mu.Unlock()
if opens > 10 {
t.Logf("open calls = %d", opens)
t.Logf("close calls = %d", closes)
t.Errorf("db connections opened = %d; want <= 10", opens)
db.dumpDeps(t)
}
if err := stmt.Close(); err != nil {
t.Fatal(err)
}
if g, w := db.numFreeConns(), 10; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(10, time.Second); n > 10 {
t.Errorf("number of dependencies = %d; expected <= 10", n)
db.dumpDeps(t)
}
db.SetMaxOpenConns(5)
if g, w := db.numFreeConns(), 5; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(5, time.Second); n > 5 {
t.Errorf("number of dependencies = %d; expected 0", n)
db.dumpDeps(t)
}
db.SetMaxOpenConns(0)
if g, w := db.numFreeConns(), 5; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(5, time.Second); n > 5 {
t.Errorf("number of dependencies = %d; expected 0", n)
db.dumpDeps(t)
}
db.clearAllConns(t)
}
// Issue 9453: tests that SetMaxOpenConns can be lowered at runtime
// and affects the subsequent release of connections.
func TestMaxOpenConnsOnBusy(t *testing.T) {
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
db := newTestDB(t, "magicquery")
defer closeDB(t, db)
db.SetMaxOpenConns(3)
ctx := context.Background()
conn0, err := db.conn(ctx, cachedOrNewConn)
if err != nil {
t.Fatalf("db open conn fail: %v", err)
}
conn1, err := db.conn(ctx, cachedOrNewConn)
if err != nil {
t.Fatalf("db open conn fail: %v", err)
}
conn2, err := db.conn(ctx, cachedOrNewConn)
if err != nil {
t.Fatalf("db open conn fail: %v", err)
}
if g, w := db.numOpen, 3; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
db.SetMaxOpenConns(2)
if g, w := db.numOpen, 3; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
conn0.releaseConn(nil)
conn1.releaseConn(nil)
if g, w := db.numOpen, 2; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
conn2.releaseConn(nil)
if g, w := db.numOpen, 2; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
}
// Issue 10886: tests that all connection attempts return when more than
// DB.maxOpen connections are in flight and the first DB.maxOpen fail.
func TestPendingConnsAfterErr(t *testing.T) {
const (
maxOpen = 2
tryOpen = maxOpen*2 + 2
)
// No queries will be run.
db, err := Open("test", fakeDBName)
if err != nil {
t.Fatalf("Open: %v", err)
}
defer closeDB(t, db)
defer func() {
for k, v := range db.lastPut {
t.Logf("%p: %v", k, v)
}
}()
db.SetMaxOpenConns(maxOpen)
db.SetMaxIdleConns(0)
errOffline := errors.New("db offline")
defer func() { setHookOpenErr(nil) }()
errs := make(chan error, tryOpen)
var opening sync.WaitGroup
opening.Add(tryOpen)
setHookOpenErr(func() error {
// Wait for all connections to enqueue.
opening.Wait()
return errOffline
})
for i := 0; i < tryOpen; i++ {
go func() {
opening.Done() // signal one connection is in flight
_, err := db.Exec("will never run")
errs <- err
}()
}
opening.Wait() // wait for all workers to begin running
const timeout = 5 * time.Second
to := time.NewTimer(timeout)
defer to.Stop()
// check that all connections fail without deadlock
for i := 0; i < tryOpen; i++ {
select {
case err := <-errs:
if got, want := err, errOffline; got != want {
t.Errorf("unexpected err: got %v, want %v", got, want)
}
case <-to.C:
t.Fatalf("orphaned connection request(s), still waiting after %v", timeout)
}
}
// Wait a reasonable time for the database to close all connections.
tick := time.NewTicker(3 * time.Millisecond)
defer tick.Stop()
for {
select {
case <-tick.C:
db.mu.Lock()
if db.numOpen == 0 {
db.mu.Unlock()
return
}
db.mu.Unlock()
case <-to.C:
// Closing the database will check for numOpen and fail the test.
return
}
}
}
func TestSingleOpenConn(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
db.SetMaxOpenConns(1)
rows, err := db.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
if err = rows.Close(); err != nil {
t.Fatal(err)
}
// shouldn't deadlock
rows, err = db.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
if err = rows.Close(); err != nil {
t.Fatal(err)
}
}
func TestStats(t *testing.T) {
db := newTestDB(t, "people")
stats := db.Stats()
if got := stats.OpenConnections; got != 1 {
t.Errorf("stats.OpenConnections = %d; want 1", got)
}
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
closeDB(t, db)
stats = db.Stats()
if got := stats.OpenConnections; got != 0 {
t.Errorf("stats.OpenConnections = %d; want 0", got)
}
}
func TestConnMaxLifetime(t *testing.T) {
t0 := time.Unix(1000000, 0)
offset := time.Duration(0)
nowFunc = func() time.Time { return t0.Add(offset) }
defer func() { nowFunc = time.Now }()
db := newTestDB(t, "magicquery")
defer closeDB(t, db)
driver := db.Driver().(*fakeDriver)
// Force the number of open connections to 0 so we can get an accurate
// count for the test
db.clearAllConns(t)
driver.mu.Lock()
opens0 := driver.openCount
closes0 := driver.closeCount
driver.mu.Unlock()
db.SetMaxIdleConns(10)
db.SetMaxOpenConns(10)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
offset = time.Second
tx2, err := db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
tx2.Commit()
driver.mu.Lock()
opens := driver.openCount - opens0
closes := driver.closeCount - closes0
driver.mu.Unlock()
if opens != 2 {
t.Errorf("opens = %d; want 2", opens)
}
if closes != 0 {
t.Errorf("closes = %d; want 0", closes)
}
if g, w := db.numFreeConns(), 2; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
// Expire first conn
offset = 11 * time.Second
db.SetConnMaxLifetime(10 * time.Second)
if err != nil {
t.Fatal(err)
}
tx, err = db.Begin()
if err != nil {
t.Fatal(err)
}
tx2, err = db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
tx2.Commit()
driver.mu.Lock()
opens = driver.openCount - opens0
closes = driver.closeCount - closes0
driver.mu.Unlock()
if opens != 3 {
t.Errorf("opens = %d; want 3", opens)
}
if closes != 1 {
t.Errorf("closes = %d; want 1", closes)
}
}
// golang.org/issue/5323
func TestStmtCloseDeps(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
db := newTestDB(t, "magicquery")
defer closeDB(t, db)
driver := db.Driver().(*fakeDriver)
driver.mu.Lock()
opens0 := driver.openCount
closes0 := driver.closeCount
driver.mu.Unlock()
openDelta0 := opens0 - closes0
stmt, err := db.Prepare("SELECT|magicquery|op|op=?,millis=?")
if err != nil {
t.Fatal(err)
}
// Start 50 parallel slow queries.
const (
nquery = 50
sleepMillis = 25
nbatch = 2
)
var wg sync.WaitGroup
for batch := 0; batch < nbatch; batch++ {
for i := 0; i < nquery; i++ {
wg.Add(1)
go func() {
defer wg.Done()
var op string
if err := stmt.QueryRow("sleep", sleepMillis).Scan(&op); err != nil && err != ErrNoRows {
t.Error(err)
}
}()
}
// Sleep for twice the expected length of time for the
// batch of 50 queries above to finish before starting
// the next round.
time.Sleep(2 * sleepMillis * time.Millisecond)
}
wg.Wait()
if g, w := db.numFreeConns(), 2; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(4, time.Second); n > 4 {
t.Errorf("number of dependencies = %d; expected <= 4", n)
db.dumpDeps(t)
}
driver.mu.Lock()
opens := driver.openCount - opens0
closes := driver.closeCount - closes0
openDelta := (driver.openCount - driver.closeCount) - openDelta0
driver.mu.Unlock()
if openDelta > 2 {
t.Logf("open calls = %d", opens)
t.Logf("close calls = %d", closes)
t.Logf("open delta = %d", openDelta)
t.Errorf("db connections opened = %d; want <= 2", openDelta)
db.dumpDeps(t)
}
if !waitCondition(5*time.Second, 5*time.Millisecond, func() bool {
return len(stmt.css) <= nquery
}) {
t.Errorf("len(stmt.css) = %d; want <= %d", len(stmt.css), nquery)
}
if err := stmt.Close(); err != nil {
t.Fatal(err)
}
if g, w := db.numFreeConns(), 2; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(2, time.Second); n > 2 {
t.Errorf("number of dependencies = %d; expected <= 2", n)
db.dumpDeps(t)
}
db.clearAllConns(t)
}
// golang.org/issue/5046
func TestCloseConnBeforeStmts(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v; from %s", err, stack())
db.dumpDeps(t)
t.Errorf("DB = %#v", db)
}
})
stmt, err := db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
if len(db.freeConn) != 1 {
t.Fatalf("expected 1 freeConn; got %d", len(db.freeConn))
}
dc := db.freeConn[0]
if dc.closed {
t.Errorf("conn shouldn't be closed")
}
if n := len(dc.openStmt); n != 1 {
t.Errorf("driverConn num openStmt = %d; want 1", n)
}
err = db.Close()
if err != nil {
t.Errorf("db Close = %v", err)
}
if !dc.closed {
t.Errorf("after db.Close, driverConn should be closed")
}
if n := len(dc.openStmt); n != 0 {
t.Errorf("driverConn num openStmt = %d; want 0", n)
}
err = stmt.Close()
if err != nil {
t.Errorf("Stmt close = %v", err)
}
if !dc.closed {
t.Errorf("conn should be closed")
}
if dc.ci != nil {
t.Errorf("after Stmt Close, driverConn's Conn interface should be nil")
}
}
// golang.org/issue/5283: don't release the Rows' connection in Close
// before calling Stmt.Close.
func TestRowsCloseOrder(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
db.SetMaxIdleConns(0)
setStrictFakeConnClose(t)
defer setStrictFakeConnClose(nil)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
err = rows.Close()
if err != nil {
t.Fatal(err)
}
}
func TestRowsImplicitClose(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
want, fail := 2, errors.New("fail")
r := rows.rowsi.(*rowsCursor)
r.errPos, r.err = want, fail
got := 0
for rows.Next() {
got++
}
if got != want {
t.Errorf("got %d rows, want %d", got, want)
}
if err := rows.Err(); err != fail {
t.Errorf("got error %v, want %v", err, fail)
}
if !r.closed {
t.Errorf("r.closed is false, want true")
}
}
func TestStmtCloseOrder(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
db.SetMaxIdleConns(0)
setStrictFakeConnClose(t)
defer setStrictFakeConnClose(nil)
_, err := db.Query("SELECT|non_existent|name|")
if err == nil {
t.Fatal("Querying non-existent table should fail")
}
}
// Test cases where there's more than maxBadConnRetries bad connections in the
// pool (issue 8834)
func TestManyErrBadConn(t *testing.T) {
manyErrBadConnSetup := func(first ...func(db *DB)) *DB {
db := newTestDB(t, "people")
for _, f := range first {
f(db)
}
nconn := maxBadConnRetries + 1
db.SetMaxIdleConns(nconn)
db.SetMaxOpenConns(nconn)
// open enough connections
func() {
for i := 0; i < nconn; i++ {
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
defer rows.Close()
}
}()
db.mu.Lock()
defer db.mu.Unlock()
if db.numOpen != nconn {
t.Fatalf("unexpected numOpen %d (was expecting %d)", db.numOpen, nconn)
} else if len(db.freeConn) != nconn {
t.Fatalf("unexpected len(db.freeConn) %d (was expecting %d)", len(db.freeConn), nconn)
}
for _, conn := range db.freeConn {
conn.Lock()
conn.ci.(*fakeConn).stickyBad = true
conn.Unlock()
}
return db
}
// Query
db := manyErrBadConnSetup()
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
if err = rows.Close(); err != nil {
t.Fatal(err)
}
// Exec
db = manyErrBadConnSetup()
defer closeDB(t, db)
_, err = db.Exec("INSERT|people|name=Julia,age=19")
if err != nil {
t.Fatal(err)
}
// Begin
db = manyErrBadConnSetup()
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
if err = tx.Rollback(); err != nil {
t.Fatal(err)
}
// Prepare
db = manyErrBadConnSetup()
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
if err = stmt.Close(); err != nil {
t.Fatal(err)
}
// Stmt.Exec
db = manyErrBadConnSetup(func(db *DB) {
stmt, err = db.Prepare("INSERT|people|name=Julia,age=19")
if err != nil {
t.Fatal(err)
}
})
defer closeDB(t, db)
_, err = stmt.Exec()
if err != nil {
t.Fatal(err)
}
if err = stmt.Close(); err != nil {
t.Fatal(err)
}
// Stmt.Query
db = manyErrBadConnSetup(func(db *DB) {
stmt, err = db.Prepare("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
})
defer closeDB(t, db)
rows, err = stmt.Query()
if err != nil {
t.Fatal(err)
}
if err = rows.Close(); err != nil {
t.Fatal(err)
}
if err = stmt.Close(); err != nil {
t.Fatal(err)
}
// Conn
db = manyErrBadConnSetup()
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal(err)
}
conn.dc.ci.(*fakeConn).skipDirtySession = true
err = conn.Close()
if err != nil {
t.Fatal(err)
}
// Ping
db = manyErrBadConnSetup()
defer closeDB(t, db)
err = db.PingContext(ctx)
if err != nil {
t.Fatal(err)
}
}
// TestIssue20575 ensures the Rows from query does not block
// closing a transaction. Ensure Rows is closed while closing a trasaction.
func TestIssue20575(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
_, err = tx.QueryContext(ctx, "SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
// Do not close Rows from QueryContext.
err = tx.Rollback()
if err != nil {
t.Fatal(err)
}
select {
default:
case <-ctx.Done():
t.Fatal("timeout: failed to rollback query without closing rows:", ctx.Err())
}
}
// TestIssue20622 tests closing the transaction before rows is closed, requires
// the race detector to fail.
func TestIssue20622(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
rows, err := tx.Query("SELECT|people|age,name|")
if err != nil {
t.Fatal(err)
}
count := 0
for rows.Next() {
count++
var age int
var name string
if err := rows.Scan(&age, &name); err != nil {
t.Fatal("scan failed", err)
}
if count == 1 {
cancel()
}
time.Sleep(100 * time.Millisecond)
}
rows.Close()
tx.Commit()
}
// golang.org/issue/5718
func TestErrBadConnReconnect(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
simulateBadConn := func(name string, hook *func() bool, op func() error) {
broken, retried := false, false
numOpen := db.numOpen
// simulate a broken connection on the first try
*hook = func() bool {
if !broken {
broken = true
return true
}
retried = true
return false
}
if err := op(); err != nil {
t.Errorf(name+": %v", err)
return
}
if !broken || !retried {
t.Error(name + ": Failed to simulate broken connection")
}
*hook = nil
if numOpen != db.numOpen {
t.Errorf(name+": leaked %d connection(s)!", db.numOpen-numOpen)
numOpen = db.numOpen
}
}
// db.Exec
dbExec := func() error {
_, err := db.Exec("INSERT|t1|name=?,age=?,dead=?", "Gordon", 3, true)
return err
}
simulateBadConn("db.Exec prepare", &hookPrepareBadConn, dbExec)
simulateBadConn("db.Exec exec", &hookExecBadConn, dbExec)
// db.Query
dbQuery := func() error {
rows, err := db.Query("SELECT|t1|age,name|")
if err == nil {
err = rows.Close()
}
return err
}
simulateBadConn("db.Query prepare", &hookPrepareBadConn, dbQuery)
simulateBadConn("db.Query query", &hookQueryBadConn, dbQuery)
// db.Prepare
simulateBadConn("db.Prepare", &hookPrepareBadConn, func() error {
stmt, err := db.Prepare("INSERT|t1|name=?,age=?,dead=?")
if err != nil {
return err
}
stmt.Close()
return nil
})
// Provide a way to force a re-prepare of a statement on next execution
forcePrepare := func(stmt *Stmt) {
stmt.css = nil
}
// stmt.Exec
stmt1, err := db.Prepare("INSERT|t1|name=?,age=?,dead=?")
if err != nil {
t.Fatalf("prepare: %v", err)
}
defer stmt1.Close()
// make sure we must prepare the stmt first
forcePrepare(stmt1)
stmtExec := func() error {
_, err := stmt1.Exec("Gopher", 3, false)
return err
}
simulateBadConn("stmt.Exec prepare", &hookPrepareBadConn, stmtExec)
simulateBadConn("stmt.Exec exec", &hookExecBadConn, stmtExec)
// stmt.Query
stmt2, err := db.Prepare("SELECT|t1|age,name|")
if err != nil {
t.Fatalf("prepare: %v", err)
}
defer stmt2.Close()
// make sure we must prepare the stmt first
forcePrepare(stmt2)
stmtQuery := func() error {
rows, err := stmt2.Query()
if err == nil {
err = rows.Close()
}
return err
}
simulateBadConn("stmt.Query prepare", &hookPrepareBadConn, stmtQuery)
simulateBadConn("stmt.Query exec", &hookQueryBadConn, stmtQuery)
}
// golang.org/issue/11264
func TestTxEndBadConn(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
db.SetMaxIdleConns(0)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
db.SetMaxIdleConns(1)
simulateBadConn := func(name string, hook *func() bool, op func() error) {
broken := false
numOpen := db.numOpen
*hook = func() bool {
if !broken {
broken = true
}
return broken
}
if err := op(); err != driver.ErrBadConn {
t.Errorf(name+": %v", err)
return
}
if !broken {
t.Error(name + ": Failed to simulate broken connection")
}
*hook = nil
if numOpen != db.numOpen {
t.Errorf(name+": leaked %d connection(s)!", db.numOpen-numOpen)
}
}
// db.Exec
dbExec := func(endTx func(tx *Tx) error) func() error {
return func() error {
tx, err := db.Begin()
if err != nil {
return err
}
_, err = tx.Exec("INSERT|t1|name=?,age=?,dead=?", "Gordon", 3, true)
if err != nil {
return err
}
return endTx(tx)
}
}
simulateBadConn("db.Tx.Exec commit", &hookCommitBadConn, dbExec((*Tx).Commit))
simulateBadConn("db.Tx.Exec rollback", &hookRollbackBadConn, dbExec((*Tx).Rollback))
// db.Query
dbQuery := func(endTx func(tx *Tx) error) func() error {
return func() error {
tx, err := db.Begin()
if err != nil {
return err
}
rows, err := tx.Query("SELECT|t1|age,name|")
if err == nil {
err = rows.Close()
} else {
return err
}
return endTx(tx)
}
}
simulateBadConn("db.Tx.Query commit", &hookCommitBadConn, dbQuery((*Tx).Commit))
simulateBadConn("db.Tx.Query rollback", &hookRollbackBadConn, dbQuery((*Tx).Rollback))
}
type concurrentTest interface {
init(t testing.TB, db *DB)
finish(t testing.TB)
test(t testing.TB) error
}
type concurrentDBQueryTest struct {
db *DB
}
func (c *concurrentDBQueryTest) init(t testing.TB, db *DB) {
c.db = db
}
func (c *concurrentDBQueryTest) finish(t testing.TB) {
c.db = nil
}
func (c *concurrentDBQueryTest) test(t testing.TB) error {
rows, err := c.db.Query("SELECT|people|name|")
if err != nil {
t.Error(err)
return err
}
var name string
for rows.Next() {
rows.Scan(&name)
}
rows.Close()
return nil
}
type concurrentDBExecTest struct {
db *DB
}
func (c *concurrentDBExecTest) init(t testing.TB, db *DB) {
c.db = db
}
func (c *concurrentDBExecTest) finish(t testing.TB) {
c.db = nil
}
func (c *concurrentDBExecTest) test(t testing.TB) error {
_, err := c.db.Exec("NOSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?", 3, chrisBirthday)
if err != nil {
t.Error(err)
return err
}
return nil
}
type concurrentStmtQueryTest struct {
db *DB
stmt *Stmt
}
func (c *concurrentStmtQueryTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.stmt, err = db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentStmtQueryTest) finish(t testing.TB) {
if c.stmt != nil {
c.stmt.Close()
c.stmt = nil
}
c.db = nil
}
func (c *concurrentStmtQueryTest) test(t testing.TB) error {
rows, err := c.stmt.Query()
if err != nil {
t.Errorf("error on query: %v", err)
return err
}
var name string
for rows.Next() {
rows.Scan(&name)
}
rows.Close()
return nil
}
type concurrentStmtExecTest struct {
db *DB
stmt *Stmt
}
func (c *concurrentStmtExecTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.stmt, err = db.Prepare("NOSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?")
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentStmtExecTest) finish(t testing.TB) {
if c.stmt != nil {
c.stmt.Close()
c.stmt = nil
}
c.db = nil
}
func (c *concurrentStmtExecTest) test(t testing.TB) error {
_, err := c.stmt.Exec(3, chrisBirthday)
if err != nil {
t.Errorf("error on exec: %v", err)
return err
}
return nil
}
type concurrentTxQueryTest struct {
db *DB
tx *Tx
}
func (c *concurrentTxQueryTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.tx, err = c.db.Begin()
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentTxQueryTest) finish(t testing.TB) {
if c.tx != nil {
c.tx.Rollback()
c.tx = nil
}
c.db = nil
}
func (c *concurrentTxQueryTest) test(t testing.TB) error {
rows, err := c.db.Query("SELECT|people|name|")
if err != nil {
t.Error(err)
return err
}
var name string
for rows.Next() {
rows.Scan(&name)
}
rows.Close()
return nil
}
type concurrentTxExecTest struct {
db *DB
tx *Tx
}
func (c *concurrentTxExecTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.tx, err = c.db.Begin()
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentTxExecTest) finish(t testing.TB) {
if c.tx != nil {
c.tx.Rollback()
c.tx = nil
}
c.db = nil
}
func (c *concurrentTxExecTest) test(t testing.TB) error {
_, err := c.tx.Exec("NOSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?", 3, chrisBirthday)
if err != nil {
t.Error(err)
return err
}
return nil
}
type concurrentTxStmtQueryTest struct {
db *DB
tx *Tx
stmt *Stmt
}
func (c *concurrentTxStmtQueryTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.tx, err = c.db.Begin()
if err != nil {
t.Fatal(err)
}
c.stmt, err = c.tx.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentTxStmtQueryTest) finish(t testing.TB) {
if c.stmt != nil {
c.stmt.Close()
c.stmt = nil
}
if c.tx != nil {
c.tx.Rollback()
c.tx = nil
}
c.db = nil
}
func (c *concurrentTxStmtQueryTest) test(t testing.TB) error {
rows, err := c.stmt.Query()
if err != nil {
t.Errorf("error on query: %v", err)
return err
}
var name string
for rows.Next() {
rows.Scan(&name)
}
rows.Close()
return nil
}
type concurrentTxStmtExecTest struct {
db *DB
tx *Tx
stmt *Stmt
}
func (c *concurrentTxStmtExecTest) init(t testing.TB, db *DB) {
c.db = db
var err error
c.tx, err = c.db.Begin()
if err != nil {
t.Fatal(err)
}
c.stmt, err = c.tx.Prepare("NOSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?")
if err != nil {
t.Fatal(err)
}
}
func (c *concurrentTxStmtExecTest) finish(t testing.TB) {
if c.stmt != nil {
c.stmt.Close()
c.stmt = nil
}
if c.tx != nil {
c.tx.Rollback()
c.tx = nil
}
c.db = nil
}
func (c *concurrentTxStmtExecTest) test(t testing.TB) error {
_, err := c.stmt.Exec(3, chrisBirthday)
if err != nil {
t.Errorf("error on exec: %v", err)
return err
}
return nil
}
type concurrentRandomTest struct {
tests []concurrentTest
}
func (c *concurrentRandomTest) init(t testing.TB, db *DB) {
c.tests = []concurrentTest{
new(concurrentDBQueryTest),
new(concurrentDBExecTest),
new(concurrentStmtQueryTest),
new(concurrentStmtExecTest),
new(concurrentTxQueryTest),
new(concurrentTxExecTest),
new(concurrentTxStmtQueryTest),
new(concurrentTxStmtExecTest),
}
for _, ct := range c.tests {
ct.init(t, db)
}
}
func (c *concurrentRandomTest) finish(t testing.TB) {
for _, ct := range c.tests {
ct.finish(t)
}
}
func (c *concurrentRandomTest) test(t testing.TB) error {
ct := c.tests[rand.Intn(len(c.tests))]
return ct.test(t)
}
func doConcurrentTest(t testing.TB, ct concurrentTest) {
maxProcs, numReqs := 1, 500
if testing.Short() {
maxProcs, numReqs = 4, 50
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(maxProcs))
db := newTestDB(t, "people")
defer closeDB(t, db)
ct.init(t, db)
defer ct.finish(t)
var wg sync.WaitGroup
wg.Add(numReqs)
reqs := make(chan bool)
defer close(reqs)
for i := 0; i < maxProcs*2; i++ {
go func() {
for range reqs {
err := ct.test(t)
if err != nil {
wg.Done()
continue
}
wg.Done()
}
}()
}
for i := 0; i < numReqs; i++ {
reqs <- true
}
wg.Wait()
}
func TestIssue6081(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
drv := db.Driver().(*fakeDriver)
drv.mu.Lock()
opens0 := drv.openCount
closes0 := drv.closeCount
drv.mu.Unlock()
stmt, err := db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
setRowsCloseHook(func(rows *Rows, err *error) {
*err = driver.ErrBadConn
})
defer setRowsCloseHook(nil)
for i := 0; i < 10; i++ {
rows, err := stmt.Query()
if err != nil {
t.Fatal(err)
}
rows.Close()
}
if n := len(stmt.css); n > 1 {
t.Errorf("len(css slice) = %d; want <= 1", n)
}
stmt.Close()
if n := len(stmt.css); n != 0 {
t.Errorf("len(css slice) after Close = %d; want 0", n)
}
drv.mu.Lock()
opens := drv.openCount - opens0
closes := drv.closeCount - closes0
drv.mu.Unlock()
if opens < 9 {
t.Errorf("opens = %d; want >= 9", opens)
}
if closes < 9 {
t.Errorf("closes = %d; want >= 9", closes)
}
}
// TestIssue18429 attempts to stress rolling back the transaction from a
// context cancel while simultaneously calling Tx.Rollback. Rolling back from a
// context happens concurrently so tx.rollback and tx.Commit must guard against
// double entry.
//
// In the test, a context is canceled while the query is in process so
// the internal rollback will run concurrently with the explicitly called
// Tx.Rollback.
//
// The addition of calling rows.Next also tests
// Issue 21117.
func TestIssue18429(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx := context.Background()
sem := make(chan bool, 20)
var wg sync.WaitGroup
const milliWait = 30
for i := 0; i < 100; i++ {
sem <- true
wg.Add(1)
go func() {
defer func() {
<-sem
wg.Done()
}()
qwait := (time.Duration(rand.Intn(milliWait)) * time.Millisecond).String()
ctx, cancel := context.WithTimeout(ctx, time.Duration(rand.Intn(milliWait))*time.Millisecond)
defer cancel()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return
}
// This is expected to give a cancel error most, but not all the time.
// Test failure will happen with a panic or other race condition being
// reported.
rows, _ := tx.QueryContext(ctx, "WAIT|"+qwait+"|SELECT|people|name|")
if rows != nil {
var name string
// Call Next to test Issue 21117 and check for races.
for rows.Next() {
// Scan the buffer so it is read and checked for races.
rows.Scan(&name)
}
rows.Close()
}
// This call will race with the context cancel rollback to complete
// if the rollback itself isn't guarded.
tx.Rollback()
}()
}
wg.Wait()
}
// TestIssue20160 attempts to test a short context life on a stmt Query.
func TestIssue20160(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx := context.Background()
sem := make(chan bool, 20)
var wg sync.WaitGroup
const milliWait = 30
stmt, err := db.PrepareContext(ctx, "SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer stmt.Close()
for i := 0; i < 100; i++ {
sem <- true
wg.Add(1)
go func() {
defer func() {
<-sem
wg.Done()
}()
ctx, cancel := context.WithTimeout(ctx, time.Duration(rand.Intn(milliWait))*time.Millisecond)
defer cancel()
// This is expected to give a cancel error most, but not all the time.
// Test failure will happen with a panic or other race condition being
// reported.
rows, _ := stmt.QueryContext(ctx)
if rows != nil {
rows.Close()
}
}()
}
wg.Wait()
}
// TestIssue18719 closes the context right before use. The sql.driverConn
// will nil out the ci on close in a lock, but if another process uses it right after
// it will panic with on the nil ref.
//
// See https://golang.org/cl/35550 .
func TestIssue18719(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
hookTxGrabConn = func() {
cancel()
// Wait for the context to cancel and tx to rollback.
for tx.isDone() == false {
time.Sleep(3 * time.Millisecond)
}
}
defer func() { hookTxGrabConn = nil }()
// This call will grab the connection and cancel the context
// after it has done so. Code after must deal with the canceled state.
_, err = tx.QueryContext(ctx, "SELECT|people|name|")
if err != nil {
t.Fatalf("expected error %v but got %v", nil, err)
}
// Rows may be ignored because it will be closed when the context is canceled.
// Do not explicitly rollback. The rollback will happen from the
// canceled context.
cancel()
}
func TestIssue20647(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal(err)
}
conn.dc.ci.(*fakeConn).skipDirtySession = true
defer conn.Close()
stmt, err := conn.PrepareContext(ctx, "SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer stmt.Close()
rows1, err := stmt.QueryContext(ctx)
if err != nil {
t.Fatal("rows1", err)
}
defer rows1.Close()
rows2, err := stmt.QueryContext(ctx)
if err != nil {
t.Fatal("rows2", err)
}
defer rows2.Close()
if rows1.dc != rows2.dc {
t.Fatal("stmt prepared on Conn does not use same connection")
}
}
func TestConcurrency(t *testing.T) {
list := []struct {
name string
ct concurrentTest
}{
{"Query", new(concurrentDBQueryTest)},
{"Exec", new(concurrentDBExecTest)},
{"StmtQuery", new(concurrentStmtQueryTest)},
{"StmtExec", new(concurrentStmtExecTest)},
{"TxQuery", new(concurrentTxQueryTest)},
{"TxExec", new(concurrentTxExecTest)},
{"TxStmtQuery", new(concurrentTxStmtQueryTest)},
{"TxStmtExec", new(concurrentTxStmtExecTest)},
{"Random", new(concurrentRandomTest)},
}
for _, item := range list {
t.Run(item.name, func(t *testing.T) {
doConcurrentTest(t, item.ct)
})
}
}
func TestConnectionLeak(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
// Start by opening defaultMaxIdleConns
rows := make([]*Rows, defaultMaxIdleConns)
// We need to SetMaxOpenConns > MaxIdleConns, so the DB can open
// a new connection and we can fill the idle queue with the released
// connections.
db.SetMaxOpenConns(len(rows) + 1)
for ii := range rows {
r, err := db.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
r.Next()
if err := r.Err(); err != nil {
t.Fatal(err)
}
rows[ii] = r
}
// Now we have defaultMaxIdleConns busy connections. Open
// a new one, but wait until the busy connections are released
// before returning control to DB.
drv := db.Driver().(*fakeDriver)
drv.waitCh = make(chan struct{}, 1)
drv.waitingCh = make(chan struct{}, 1)
var wg sync.WaitGroup
wg.Add(1)
go func() {
r, err := db.Query("SELECT|people|name|")
if err != nil {
t.Error(err)
return
}
r.Close()
wg.Done()
}()
// Wait until the goroutine we've just created has started waiting.
<-drv.waitingCh
// Now close the busy connections. This provides a connection for
// the blocked goroutine and then fills up the idle queue.
for _, v := range rows {
v.Close()
}
// At this point we give the new connection to DB. This connection is
// now useless, since the idle queue is full and there are no pending
// requests. DB should deal with this situation without leaking the
// connection.
drv.waitCh <- struct{}{}
wg.Wait()
}
type nvcDriver struct {
fakeDriver
skipNamedValueCheck bool
}
func (d *nvcDriver) Open(dsn string) (driver.Conn, error) {
c, err := d.fakeDriver.Open(dsn)
fc := c.(*fakeConn)
fc.db.allowAny = true
return &nvcConn{fc, d.skipNamedValueCheck}, err
}
type nvcConn struct {
*fakeConn
skipNamedValueCheck bool
}
type decimal struct {
value int
}
type doNotInclude struct{}
var _ driver.NamedValueChecker = &nvcConn{}
func (c *nvcConn) CheckNamedValue(nv *driver.NamedValue) error {
if c.skipNamedValueCheck {
return driver.ErrSkip
}
switch v := nv.Value.(type) {
default:
return driver.ErrSkip
case Out:
switch ov := v.Dest.(type) {
default:
return errors.New("unknown NameValueCheck OUTPUT type")
case *string:
*ov = "from-server"
nv.Value = "OUT:*string"
}
return nil
case decimal, []int64:
return nil
case doNotInclude:
return driver.ErrRemoveArgument
}
}
func TestNamedValueChecker(t *testing.T) {
Register("NamedValueCheck", &nvcDriver{})
db, err := Open("NamedValueCheck", "")
if err != nil {
t.Fatal(err)
}
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
_, err = db.ExecContext(ctx, "WIPE")
if err != nil {
t.Fatal("exec wipe", err)
}
_, err = db.ExecContext(ctx, "CREATE|keys|dec1=any,str1=string,out1=string,array1=any")
if err != nil {
t.Fatal("exec create", err)
}
o1 := ""
_, err = db.ExecContext(ctx, "INSERT|keys|dec1=?A,str1=?,out1=?O1,array1=?", Named("A", decimal{123}), "hello", Named("O1", Out{Dest: &o1}), []int64{42, 128, 707}, doNotInclude{})
if err != nil {
t.Fatal("exec insert", err)
}
var (
str1 string
dec1 decimal
arr1 []int64
)
err = db.QueryRowContext(ctx, "SELECT|keys|dec1,str1,array1|").Scan(&dec1, &str1, &arr1)
if err != nil {
t.Fatal("select", err)
}
list := []struct{ got, want interface{} }{
{o1, "from-server"},
{dec1, decimal{123}},
{str1, "hello"},
{arr1, []int64{42, 128, 707}},
}
for index, item := range list {
if !reflect.DeepEqual(item.got, item.want) {
t.Errorf("got %#v wanted %#v for index %d", item.got, item.want, index)
}
}
}
func TestNamedValueCheckerSkip(t *testing.T) {
Register("NamedValueCheckSkip", &nvcDriver{skipNamedValueCheck: true})
db, err := Open("NamedValueCheckSkip", "")
if err != nil {
t.Fatal(err)
}
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
_, err = db.ExecContext(ctx, "WIPE")
if err != nil {
t.Fatal("exec wipe", err)
}
_, err = db.ExecContext(ctx, "CREATE|keys|dec1=any")
if err != nil {
t.Fatal("exec create", err)
}
_, err = db.ExecContext(ctx, "INSERT|keys|dec1=?A", Named("A", decimal{123}))
if err == nil {
t.Fatalf("expected error with bad argument, got %v", err)
}
}
func TestOpenConnector(t *testing.T) {
Register("testctx", &fakeDriverCtx{})
db, err := Open("testctx", "people")
if err != nil {
t.Fatal(err)
}
defer db.Close()
if _, is := db.connector.(*fakeConnector); !is {
t.Fatal("not using *fakeConnector")
}
}
type ctxOnlyDriver struct {
fakeDriver
}
func (d *ctxOnlyDriver) Open(dsn string) (driver.Conn, error) {
conn, err := d.fakeDriver.Open(dsn)
if err != nil {
return nil, err
}
return &ctxOnlyConn{fc: conn.(*fakeConn)}, nil
}
var (
_ driver.Conn = &ctxOnlyConn{}
_ driver.QueryerContext = &ctxOnlyConn{}
_ driver.ExecerContext = &ctxOnlyConn{}
)
type ctxOnlyConn struct {
fc *fakeConn
queryCtxCalled bool
execCtxCalled bool
}
func (c *ctxOnlyConn) Begin() (driver.Tx, error) {
return c.fc.Begin()
}
func (c *ctxOnlyConn) Close() error {
return c.fc.Close()
}
// Prepare is still part of the Conn interface, so while it isn't used
// must be defined for compatibility.
func (c *ctxOnlyConn) Prepare(q string) (driver.Stmt, error) {
panic("not used")
}
func (c *ctxOnlyConn) PrepareContext(ctx context.Context, q string) (driver.Stmt, error) {
return c.fc.PrepareContext(ctx, q)
}
func (c *ctxOnlyConn) QueryContext(ctx context.Context, q string, args []driver.NamedValue) (driver.Rows, error) {
c.queryCtxCalled = true
return c.fc.QueryContext(ctx, q, args)
}
func (c *ctxOnlyConn) ExecContext(ctx context.Context, q string, args []driver.NamedValue) (driver.Result, error) {
c.execCtxCalled = true
return c.fc.ExecContext(ctx, q, args)
}
// TestQueryExecContextOnly ensures drivers only need to implement QueryContext
// and ExecContext methods.
func TestQueryExecContextOnly(t *testing.T) {
// Ensure connection does not implment non-context interfaces.
var connType driver.Conn = &ctxOnlyConn{}
if _, ok := connType.(driver.Execer); ok {
t.Fatalf("%T must not implement driver.Execer", connType)
}
if _, ok := connType.(driver.Queryer); ok {
t.Fatalf("%T must not implement driver.Queryer", connType)
}
Register("ContextOnly", &ctxOnlyDriver{})
db, err := Open("ContextOnly", "")
if err != nil {
t.Fatal(err)
}
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal("db.Conn", err)
}
defer conn.Close()
coc := conn.dc.ci.(*ctxOnlyConn)
coc.fc.skipDirtySession = true
_, err = conn.ExecContext(ctx, "WIPE")
if err != nil {
t.Fatal("exec wipe", err)
}
_, err = conn.ExecContext(ctx, "CREATE|keys|v1=string")
if err != nil {
t.Fatal("exec create", err)
}
expectedValue := "value1"
_, err = conn.ExecContext(ctx, "INSERT|keys|v1=?", expectedValue)
if err != nil {
t.Fatal("exec insert", err)
}
rows, err := conn.QueryContext(ctx, "SELECT|keys|v1|")
if err != nil {
t.Fatal("query select", err)
}
v1 := ""
for rows.Next() {
err = rows.Scan(&v1)
if err != nil {
t.Fatal("rows scan", err)
}
}
rows.Close()
if v1 != expectedValue {
t.Fatalf("expected %q, got %q", expectedValue, v1)
}
if !coc.execCtxCalled {
t.Error("ExecContext not called")
}
if !coc.queryCtxCalled {
t.Error("QueryContext not called")
}
}
// badConn implements a bad driver.Conn, for TestBadDriver.
// The Exec method panics.
type badConn struct{}
func (bc badConn) Prepare(query string) (driver.Stmt, error) {
return nil, errors.New("badConn Prepare")
}
func (bc badConn) Close() error {
return nil
}
func (bc badConn) Begin() (driver.Tx, error) {
return nil, errors.New("badConn Begin")
}
func (bc badConn) Exec(query string, args []driver.Value) (driver.Result, error) {
panic("badConn.Exec")
}
// badDriver is a driver.Driver that uses badConn.
type badDriver struct{}
func (bd badDriver) Open(name string) (driver.Conn, error) {
return badConn{}, nil
}
// Issue 15901.
func TestBadDriver(t *testing.T) {
Register("bad", badDriver{})
db, err := Open("bad", "ignored")
if err != nil {
t.Fatal(err)
}
defer func() {
if r := recover(); r == nil {
t.Error("expected panic")
} else {
if want := "badConn.Exec"; r.(string) != want {
t.Errorf("panic was %v, expected %v", r, want)
}
}
}()
defer db.Close()
db.Exec("ignored")
}
type pingDriver struct {
fails bool
}
type pingConn struct {
badConn
driver *pingDriver
}
var pingError = errors.New("Ping failed")
func (pc pingConn) Ping(ctx context.Context) error {
if pc.driver.fails {
return pingError
}
return nil
}
var _ driver.Pinger = pingConn{}
func (pd *pingDriver) Open(name string) (driver.Conn, error) {
return pingConn{driver: pd}, nil
}
func TestPing(t *testing.T) {
driver := &pingDriver{}
Register("ping", driver)
db, err := Open("ping", "ignored")
if err != nil {
t.Fatal(err)
}
if err := db.Ping(); err != nil {
t.Errorf("err was %#v, expected nil", err)
return
}
driver.fails = true
if err := db.Ping(); err != pingError {
t.Errorf("err was %#v, expected pingError", err)
}
}
// Issue 18101.
func TestTypedString(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
type Str string
var scanned Str
err := db.QueryRow("SELECT|people|name|name=?", "Alice").Scan(&scanned)
if err != nil {
t.Fatal(err)
}
expected := Str("Alice")
if scanned != expected {
t.Errorf("expected %+v, got %+v", expected, scanned)
}
}
func BenchmarkConcurrentDBExec(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentDBExecTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentStmtQuery(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentStmtQueryTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentStmtExec(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentStmtExecTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentTxQuery(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentTxQueryTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentTxExec(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentTxExecTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentTxStmtQuery(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentTxStmtQueryTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentTxStmtExec(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentTxStmtExecTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkConcurrentRandom(b *testing.B) {
b.ReportAllocs()
ct := new(concurrentRandomTest)
for i := 0; i < b.N; i++ {
doConcurrentTest(b, ct)
}
}
func BenchmarkManyConcurrentQueries(b *testing.B) {
b.ReportAllocs()
// To see lock contention in Go 1.4, 16~ cores and 128~ goroutines are required.
const parallelism = 16
db := newTestDB(b, "magicquery")
defer closeDB(b, db)
db.SetMaxIdleConns(runtime.GOMAXPROCS(0) * parallelism)
stmt, err := db.Prepare("SELECT|magicquery|op|op=?,millis=?")
if err != nil {
b.Fatal(err)
}
defer stmt.Close()
b.SetParallelism(parallelism)
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
rows, err := stmt.Query("sleep", 1)
if err != nil {
b.Error(err)