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// Copyright 2013 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 main_test
import (
"bufio"
"bytes"
"fmt"
"go/build"
"io"
"io/ioutil"
"net"
"net/http"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"strings"
"testing"
"time"
)
// buildGodoc builds the godoc executable.
// It returns its path, and a cleanup function.
//
// TODO(adonovan): opt: do this at most once, and do the cleanup
// exactly once. How though? There's no atexit.
func buildGodoc(t *testing.T) (bin string, cleanup func()) {
if runtime.GOARCH == "arm" {
t.Skip("skipping test on arm platforms; too slow")
}
if runtime.GOOS == "android" {
t.Skipf("the dependencies are not available on android")
}
tmp, err := ioutil.TempDir("", "godoc-regtest-")
if err != nil {
t.Fatal(err)
}
defer func() {
if cleanup == nil { // probably, go build failed.
os.RemoveAll(tmp)
}
}()
bin = filepath.Join(tmp, "godoc")
if runtime.GOOS == "windows" {
bin += ".exe"
}
cmd := exec.Command("go", "build", "-o", bin)
if err := cmd.Run(); err != nil {
t.Fatalf("Building godoc: %v", err)
}
return bin, func() { os.RemoveAll(tmp) }
}
func serverAddress(t *testing.T) string {
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
ln, err = net.Listen("tcp6", "[::1]:0")
}
if err != nil {
t.Fatal(err)
}
defer ln.Close()
return ln.Addr().String()
}
func waitForServerReady(t *testing.T, addr string) {
waitForServer(t,
fmt.Sprintf("http://%v/", addr),
"The Go Programming Language",
15*time.Second,
false)
}
func waitForSearchReady(t *testing.T, addr string) {
waitForServer(t,
fmt.Sprintf("http://%v/search?q=FALLTHROUGH", addr),
"The list of tokens.",
2*time.Minute,
false)
}
func waitUntilScanComplete(t *testing.T, addr string) {
waitForServer(t,
fmt.Sprintf("http://%v/pkg", addr),
"Scan is not yet complete",
2*time.Minute,
true,
)
// setting reverse as true, which means this waits
// until the string is not returned in the response anymore
}
const pollInterval = 200 * time.Millisecond
func waitForServer(t *testing.T, url, match string, timeout time.Duration, reverse bool) {
// "health check" duplicated from x/tools/cmd/tipgodoc/tip.go
deadline := time.Now().Add(timeout)
for time.Now().Before(deadline) {
time.Sleep(pollInterval)
res, err := http.Get(url)
if err != nil {
continue
}
rbody, err := ioutil.ReadAll(res.Body)
res.Body.Close()
if err == nil && res.StatusCode == http.StatusOK {
if bytes.Contains(rbody, []byte(match)) && !reverse {
return
}
if !bytes.Contains(rbody, []byte(match)) && reverse {
return
}
}
}
t.Fatalf("Server failed to respond in %v", timeout)
}
// hasTag checks whether a given release tag is contained in the current version
// of the go binary.
func hasTag(t string) bool {
for _, v := range build.Default.ReleaseTags {
if t == v {
return true
}
}
return false
}
func killAndWait(cmd *exec.Cmd) {
cmd.Process.Kill()
cmd.Wait()
}
func TestURL(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping on plan9; fails to start up quickly enough")
}
bin, cleanup := buildGodoc(t)
defer cleanup()
testcase := func(url string, contents string) func(t *testing.T) {
return func(t *testing.T) {
stdout, stderr := new(bytes.Buffer), new(bytes.Buffer)
args := []string{fmt.Sprintf("-url=%s", url)}
cmd := exec.Command(bin, args...)
cmd.Stdout = stdout
cmd.Stderr = stderr
cmd.Args[0] = "godoc"
// Set GOPATH variable to non-existing path
// and GOPROXY=off to disable module fetches.
// We cannot just unset GOPATH variable because godoc would default it to ~/go.
// (We don't want the indexer looking at the local workspace during tests.)
cmd.Env = append(os.Environ(),
"GOPATH=does_not_exist",
"GOPROXY=off",
"GO111MODULE=off")
if err := cmd.Run(); err != nil {
t.Fatalf("failed to run godoc -url=%q: %s\nstderr:\n%s", url, err, stderr)
}
if !strings.Contains(stdout.String(), contents) {
t.Errorf("did not find substring %q in output of godoc -url=%q:\n%s", contents, url, stdout)
}
}
}
t.Run("index", testcase("/", "Go is an open source programming language"))
t.Run("fmt", testcase("/pkg/fmt", "Package fmt implements formatted I/O"))
}
// Basic integration test for godoc HTTP interface.
func TestWeb(t *testing.T) {
testWeb(t, false)
}
// Basic integration test for godoc HTTP interface.
func TestWebIndex(t *testing.T) {
if testing.Short() {
t.Skip("skipping test in -short mode")
}
testWeb(t, true)
}
// Basic integration test for godoc HTTP interface.
func testWeb(t *testing.T, withIndex bool) {
if runtime.GOOS == "plan9" {
t.Skip("skipping on plan9; fails to start up quickly enough")
}
bin, cleanup := buildGodoc(t)
defer cleanup()
addr := serverAddress(t)
args := []string{fmt.Sprintf("-http=%s", addr)}
if withIndex {
args = append(args, "-index", "-index_interval=-1s")
}
cmd := exec.Command(bin, args...)
cmd.Stdout = os.Stderr
cmd.Stderr = os.Stderr
cmd.Args[0] = "godoc"
// Set GOPATH variable to non-existing path
// and GOPROXY=off to disable module fetches.
// We cannot just unset GOPATH variable because godoc would default it to ~/go.
// (We don't want the indexer looking at the local workspace during tests.)
cmd.Env = append(os.Environ(),
"GOPATH=does_not_exist",
"GOPROXY=off",
"GO111MODULE=off")
if err := cmd.Start(); err != nil {
t.Fatalf("failed to start godoc: %s", err)
}
defer killAndWait(cmd)
if withIndex {
waitForSearchReady(t, addr)
} else {
waitForServerReady(t, addr)
waitUntilScanComplete(t, addr)
}
tests := []struct {
path string
contains []string // substring
match []string // regexp
notContains []string
needIndex bool
releaseTag string // optional release tag that must be in go/build.ReleaseTags
}{
{
path: "/",
contains: []string{"Go is an open source programming language"},
},
{
path: "/pkg/fmt/",
contains: []string{"Package fmt implements formatted I/O"},
},
{
path: "/src/fmt/",
contains: []string{"scan_test.go"},
},
{
path: "/src/fmt/print.go",
contains: []string{"// Println formats using"},
},
{
path: "/pkg",
contains: []string{
"Standard library",
"Package fmt implements formatted I/O",
},
notContains: []string{
"internal/syscall",
"cmd/gc",
},
},
{
path: "/pkg/?m=all",
contains: []string{
"Standard library",
"Package fmt implements formatted I/O",
"internal/syscall/?m=all",
},
notContains: []string{
"cmd/gc",
},
},
{
path: "/search?q=ListenAndServe",
contains: []string{
"/src",
},
notContains: []string{
"/pkg/bootstrap",
},
needIndex: true,
},
{
path: "/pkg/strings/",
contains: []string{
`href="/src/strings/strings.go"`,
},
},
{
path: "/cmd/compile/internal/amd64/",
contains: []string{
`href="/src/cmd/compile/internal/amd64/ssa.go"`,
},
},
{
path: "/pkg/math/bits/",
contains: []string{
`Added in Go 1.9`,
},
},
{
path: "/pkg/net/",
contains: []string{
`// IPv6 scoped addressing zone; added in Go 1.1`,
},
},
{
path: "/pkg/net/http/httptrace/",
match: []string{
`Got1xxResponse.*// Go 1\.11`,
},
releaseTag: "go1.11",
},
// Verify we don't add version info to a struct field added the same time
// as the struct itself:
{
path: "/pkg/net/http/httptrace/",
match: []string{
`(?m)GotFirstResponseByte func\(\)\s*$`,
},
},
// Remove trailing periods before adding semicolons:
{
path: "/pkg/database/sql/",
contains: []string{
"The number of connections currently in use; added in Go 1.11",
"The number of idle connections; added in Go 1.11",
},
releaseTag: "go1.11",
},
}
for _, test := range tests {
if test.needIndex && !withIndex {
continue
}
url := fmt.Sprintf("http://%s%s", addr, test.path)
resp, err := http.Get(url)
if err != nil {
t.Errorf("GET %s failed: %s", url, err)
continue
}
body, err := ioutil.ReadAll(resp.Body)
strBody := string(body)
resp.Body.Close()
if err != nil {
t.Errorf("GET %s: failed to read body: %s (response: %v)", url, err, resp)
}
isErr := false
for _, substr := range test.contains {
if test.releaseTag != "" && !hasTag(test.releaseTag) {
continue
}
if !bytes.Contains(body, []byte(substr)) {
t.Errorf("GET %s: wanted substring %q in body", url, substr)
isErr = true
}
}
for _, re := range test.match {
if test.releaseTag != "" && !hasTag(test.releaseTag) {
continue
}
if ok, err := regexp.MatchString(re, strBody); !ok || err != nil {
if err != nil {
t.Fatalf("Bad regexp %q: %v", re, err)
}
t.Errorf("GET %s: wanted to match %s in body", url, re)
isErr = true
}
}
for _, substr := range test.notContains {
if bytes.Contains(body, []byte(substr)) {
t.Errorf("GET %s: didn't want substring %q in body", url, substr)
isErr = true
}
}
if isErr {
t.Errorf("GET %s: got:\n%s", url, body)
}
}
}
// Basic integration test for godoc -analysis=type (via HTTP interface).
func TestTypeAnalysis(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test on plan9 (issue #11974)") // see comment re: Plan 9 below
}
// Write a fake GOROOT/GOPATH.
tmpdir, err := ioutil.TempDir("", "godoc-analysis")
if err != nil {
t.Fatalf("ioutil.TempDir failed: %s", err)
}
defer os.RemoveAll(tmpdir)
for _, f := range []struct{ file, content string }{
{"goroot/src/lib/lib.go", `
package lib
type T struct{}
const C = 3
var V T
func (T) F() int { return C }
`},
{"gopath/src/app/main.go", `
package main
import "lib"
func main() { print(lib.V) }
`},
} {
file := filepath.Join(tmpdir, f.file)
if err := os.MkdirAll(filepath.Dir(file), 0755); err != nil {
t.Fatalf("MkdirAll(%s) failed: %s", filepath.Dir(file), err)
}
if err := ioutil.WriteFile(file, []byte(f.content), 0644); err != nil {
t.Fatal(err)
}
}
// Start the server.
bin, cleanup := buildGodoc(t)
defer cleanup()
addr := serverAddress(t)
cmd := exec.Command(bin, fmt.Sprintf("-http=%s", addr), "-analysis=type")
cmd.Env = os.Environ()
cmd.Env = append(cmd.Env, fmt.Sprintf("GOROOT=%s", filepath.Join(tmpdir, "goroot")))
cmd.Env = append(cmd.Env, fmt.Sprintf("GOPATH=%s", filepath.Join(tmpdir, "gopath")))
cmd.Env = append(cmd.Env, "GO111MODULE=off")
cmd.Env = append(cmd.Env, "GOPROXY=off")
cmd.Stdout = os.Stderr
stderr, err := cmd.StderrPipe()
if err != nil {
t.Fatal(err)
}
cmd.Args[0] = "godoc"
if err := cmd.Start(); err != nil {
t.Fatalf("failed to start godoc: %s", err)
}
defer killAndWait(cmd)
waitForServerReady(t, addr)
// Wait for type analysis to complete.
reader := bufio.NewReader(stderr)
for {
s, err := reader.ReadString('\n') // on Plan 9 this fails
if err != nil {
t.Fatal(err)
}
fmt.Fprint(os.Stderr, s)
if strings.Contains(s, "Type analysis complete.") {
break
}
}
go io.Copy(os.Stderr, reader)
t0 := time.Now()
// Make an HTTP request and check for a regular expression match.
// The patterns are very crude checks that basic type information
// has been annotated onto the source view.
tryagain:
for _, test := range []struct{ url, pattern string }{
{"/src/lib/lib.go", "L2.*package .*Package docs for lib.*/lib"},
{"/src/lib/lib.go", "L3.*type .*type info for T.*struct"},
{"/src/lib/lib.go", "L5.*var V .*type T struct"},
{"/src/lib/lib.go", "L6.*func .*type T struct.*T.*return .*const C untyped int.*C"},
{"/src/app/main.go", "L2.*package .*Package docs for app"},
{"/src/app/main.go", "L3.*import .*Package docs for lib.*lib"},
{"/src/app/main.go", "L4.*func main.*package lib.*lib.*var lib.V lib.T.*V"},
} {
url := fmt.Sprintf("http://%s%s", addr, test.url)
resp, err := http.Get(url)
if err != nil {
t.Errorf("GET %s failed: %s", url, err)
continue
}
body, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
t.Errorf("GET %s: failed to read body: %s (response: %v)", url, err, resp)
continue
}
if !bytes.Contains(body, []byte("Static analysis features")) {
// Type analysis results usually become available within
// ~4ms after godoc startup (for this input on my machine).
if elapsed := time.Since(t0); elapsed > 500*time.Millisecond {
t.Fatalf("type analysis results still unavailable after %s", elapsed)
}
time.Sleep(10 * time.Millisecond)
goto tryagain
}
match, err := regexp.Match(test.pattern, body)
if err != nil {
t.Errorf("regexp.Match(%q) failed: %s", test.pattern, err)
continue
}
if !match {
// This is a really ugly failure message.
t.Errorf("GET %s: body doesn't match %q, got:\n%s",
url, test.pattern, string(body))
}
}
}