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// Copyright 2014 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
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"testing"
"time"
"unicode/utf8"
)
func TestExactly16Bytes(t *testing.T) {
var tests = []string{
"",
"a",
"日本語",
"1234567890123456",
"12345678901234567890",
"1234567890123本語4567890",
"12345678901234日本語567890",
"123456789012345日本語67890",
"1234567890123456日本語7890",
"1234567890123456日本語7日本語890",
}
for _, str := range tests {
got := exactly16Bytes(str)
if len(got) != 16 {
t.Errorf("exactly16Bytes(%q) is %q, length %d", str, got, len(got))
}
// Make sure it is full runes.
for _, c := range got {
if c == utf8.RuneError {
t.Errorf("exactly16Bytes(%q) is %q, has partial rune", str, got)
}
}
}
}
// tmpDir creates a temporary directory and returns its name.
func tmpDir(t *testing.T) string {
name, err := ioutil.TempDir("", "pack")
if err != nil {
t.Fatal(err)
}
return name
}
// testCreate creates an archive in the specified directory.
func testCreate(t *testing.T, dir string) {
name := filepath.Join(dir, "pack.a")
ar := archive(name, os.O_RDWR, nil)
// Add an entry by hand.
ar.addFile(helloFile.Reset())
ar.fd.Close()
// Now check it.
ar = archive(name, os.O_RDONLY, []string{helloFile.name})
var buf bytes.Buffer
stdout = &buf
verbose = true
defer func() {
stdout = os.Stdout
verbose = false
}()
ar.scan(ar.printContents)
ar.fd.Close()
result := buf.String()
// Expect verbose output plus file contents.
expect := fmt.Sprintf("%s\n%s", helloFile.name, helloFile.contents)
if result != expect {
t.Fatalf("expected %q got %q", expect, result)
}
}
// Test that we can create an archive, write to it, and get the same contents back.
// Tests the rv and then the pv command on a new archive.
func TestCreate(t *testing.T) {
dir := tmpDir(t)
defer os.RemoveAll(dir)
testCreate(t, dir)
}
// Test that we can create an archive twice with the same name (Issue 8369).
func TestCreateTwice(t *testing.T) {
dir := tmpDir(t)
defer os.RemoveAll(dir)
testCreate(t, dir)
testCreate(t, dir)
}
// Test that we can create an archive, put some files in it, and get back a correct listing.
// Tests the tv command.
func TestTableOfContents(t *testing.T) {
dir := tmpDir(t)
defer os.RemoveAll(dir)
name := filepath.Join(dir, "pack.a")
ar := archive(name, os.O_RDWR, nil)
// Add some entries by hand.
ar.addFile(helloFile.Reset())
ar.addFile(goodbyeFile.Reset())
ar.fd.Close()
// Now print it.
ar = archive(name, os.O_RDONLY, nil)
var buf bytes.Buffer
stdout = &buf
verbose = true
defer func() {
stdout = os.Stdout
verbose = false
}()
ar.scan(ar.tableOfContents)
ar.fd.Close()
result := buf.String()
// Expect verbose listing.
expect := fmt.Sprintf("%s\n%s\n", helloFile.Entry(), goodbyeFile.Entry())
if result != expect {
t.Fatalf("expected %q got %q", expect, result)
}
// Do it again without verbose.
verbose = false
buf.Reset()
ar = archive(name, os.O_RDONLY, nil)
ar.scan(ar.tableOfContents)
ar.fd.Close()
result = buf.String()
// Expect non-verbose listing.
expect = fmt.Sprintf("%s\n%s\n", helloFile.name, goodbyeFile.name)
if result != expect {
t.Fatalf("expected %q got %q", expect, result)
}
// Do it again with file list arguments.
verbose = false
buf.Reset()
ar = archive(name, os.O_RDONLY, []string{helloFile.name})
ar.scan(ar.tableOfContents)
ar.fd.Close()
result = buf.String()
// Expect only helloFile.
expect = fmt.Sprintf("%s\n", helloFile.name)
if result != expect {
t.Fatalf("expected %q got %q", expect, result)
}
}
// Test that we can create an archive, put some files in it, and get back a file.
// Tests the x command.
func TestExtract(t *testing.T) {
dir := tmpDir(t)
defer os.RemoveAll(dir)
name := filepath.Join(dir, "pack.a")
ar := archive(name, os.O_RDWR, nil)
// Add some entries by hand.
ar.addFile(helloFile.Reset())
ar.addFile(goodbyeFile.Reset())
ar.fd.Close()
// Now extract one file. We chdir to the directory of the archive for simplicity.
pwd, err := os.Getwd()
if err != nil {
t.Fatal("os.Getwd: ", err)
}
err = os.Chdir(dir)
if err != nil {
t.Fatal("os.Chdir: ", err)
}
defer func() {
err := os.Chdir(pwd)
if err != nil {
t.Fatal("os.Chdir: ", err)
}
}()
ar = archive(name, os.O_RDONLY, []string{goodbyeFile.name})
ar.scan(ar.extractContents)
ar.fd.Close()
data, err := ioutil.ReadFile(goodbyeFile.name)
if err != nil {
t.Fatal(err)
}
// Expect contents of file.
result := string(data)
expect := goodbyeFile.contents
if result != expect {
t.Fatalf("expected %q got %q", expect, result)
}
}
// Test that pack-created archives can be understood by the tools.
func TestHello(t *testing.T) {
switch runtime.GOOS {
case "android", "nacl":
t.Skipf("skipping on %s", runtime.GOOS)
}
dir := tmpDir(t)
defer os.RemoveAll(dir)
hello := filepath.Join(dir, "hello.go")
prog := `
package main
func main() {
println("hello world")
}
`
err := ioutil.WriteFile(hello, []byte(prog), 0666)
if err != nil {
t.Fatal(err)
}
char := findChar(t, dir)
run := func(args ...string) string {
return doRun(t, dir, args...)
}
run("go", "build", "cmd/pack") // writes pack binary to dir
run("go", "tool", char+"g", "hello.go")
run("./pack", "grc", "hello.a", "hello."+char)
run("go", "tool", char+"l", "-o", "a.out", "hello.a")
out := run("./a.out")
if out != "hello world\n" {
t.Fatalf("incorrect output: %q, want %q", out, "hello world\n")
}
}
// Test that pack works with very long lines in PKGDEF.
func TestLargeDefs(t *testing.T) {
switch runtime.GOOS {
case "android", "nacl":
t.Skipf("skipping on %s", runtime.GOOS)
}
dir := tmpDir(t)
defer os.RemoveAll(dir)
large := filepath.Join(dir, "large.go")
f, err := os.Create(large)
if err != nil {
t.Fatal(err)
}
b := bufio.NewWriter(f)
printf := func(format string, args ...interface{}) {
_, err := fmt.Fprintf(b, format, args...)
if err != nil {
t.Fatalf("Writing to %s: %v", large, err)
}
}
printf("package large\n\ntype T struct {\n")
for i := 0; i < 10000; i++ {
printf("f%d int `tag:\"", i)
for j := 0; j < 100; j++ {
printf("t%d=%d,", j, j)
}
printf("\"`\n")
}
printf("}\n")
if err = b.Flush(); err != nil {
t.Fatal(err)
}
if err = f.Close(); err != nil {
t.Fatal(err)
}
main := filepath.Join(dir, "main.go")
prog := `
package main
import "large"
var V large.T
func main() {
println("ok")
}
`
err = ioutil.WriteFile(main, []byte(prog), 0666)
if err != nil {
t.Fatal(err)
}
char := findChar(t, dir)
run := func(args ...string) string {
return doRun(t, dir, args...)
}
run("go", "build", "cmd/pack") // writes pack binary to dir
run("go", "tool", char+"g", "large.go")
run("./pack", "grc", "large.a", "large."+char)
run("go", "tool", char+"g", "-I", ".", "main.go")
run("go", "tool", char+"l", "-L", ".", "-o", "a.out", "main."+char)
out := run("./a.out")
if out != "ok\n" {
t.Fatalf("incorrect output: %q, want %q", out, "ok\n")
}
}
// doRun runs a program in a directory and returns the output.
func doRun(t *testing.T, dir string, args ...string) string {
cmd := exec.Command(args[0], args[1:]...)
cmd.Dir = dir
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("%v: %v\n%s", args, err, string(out))
}
return string(out)
}
// findChar returns the architecture character for the go command.
func findChar(t *testing.T, dir string) string {
out := doRun(t, dir, "go", "env")
re, err := regexp.Compile(`\s*GOCHAR=['"]?(\w)['"]?`)
if err != nil {
t.Fatal(err)
}
fields := re.FindStringSubmatch(out)
if fields == nil {
t.Fatal("cannot find GOCHAR in 'go env' output:\n", out)
}
return fields[1]
}
// Fake implementation of files.
var helloFile = &FakeFile{
name: "hello",
contents: "hello world", // 11 bytes, an odd number.
mode: 0644,
}
var goodbyeFile = &FakeFile{
name: "goodbye",
contents: "Sayonara, Jim", // 13 bytes, another odd number.
mode: 0644,
}
// FakeFile implements FileLike and also os.FileInfo.
type FakeFile struct {
name string
contents string
mode os.FileMode
offset int
}
// Reset prepares a FakeFile for reuse.
func (f *FakeFile) Reset() *FakeFile {
f.offset = 0
return f
}
// FileLike methods.
func (f *FakeFile) Name() string {
// A bit of a cheat: we only have a basename, so that's also ok for FileInfo.
return f.name
}
func (f *FakeFile) Stat() (os.FileInfo, error) {
return f, nil
}
func (f *FakeFile) Read(p []byte) (int, error) {
if f.offset >= len(f.contents) {
return 0, io.EOF
}
n := copy(p, f.contents[f.offset:])
f.offset += n
return n, nil
}
func (f *FakeFile) Close() error {
return nil
}
// os.FileInfo methods.
func (f *FakeFile) Size() int64 {
return int64(len(f.contents))
}
func (f *FakeFile) Mode() os.FileMode {
return f.mode
}
func (f *FakeFile) ModTime() time.Time {
return time.Time{}
}
func (f *FakeFile) IsDir() bool {
return false
}
func (f *FakeFile) Sys() interface{} {
return nil
}
// Special helpers.
func (f *FakeFile) Entry() *Entry {
return &Entry{
name: f.name,
mtime: 0, // Defined to be zero.
uid: 0, // Ditto.
gid: 0, // Ditto.
mode: f.mode,
size: int64(len(f.contents)),
}
}