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//go:build !baremetal && !js
package os_test
import (
"errors"
"io"
. "os"
"runtime"
"testing"
)
// TestTempDir assumes that the test environment has a filesystem with a working temp dir.
func TestTempDir(t *testing.T) {
name := TempDir() + "/_os_test_TestTempDir"
Remove(name)
f, err := OpenFile(name, O_RDWR|O_CREATE, 0644)
if err != nil {
t.Errorf("OpenFile %s: %s", name, err)
return
}
err = f.Close()
if err != nil {
t.Errorf("Close %s: %s", name, err)
}
err = Remove(name)
if err != nil {
t.Errorf("Remove %s: %s", name, err)
}
}
func TestChdir(t *testing.T) {
// Save and restore the current working directory after the test, otherwise
// we might break other tests that depend on it.
//
// Note that it doesn't work if Chdir is broken, but then this test should
// fail and highlight the issue if that is the case.
oldDir, err := Getwd()
if err != nil {
t.Errorf("Getwd() returned %v", err)
return
}
defer Chdir(oldDir)
// create and cd into a new directory
dir := "_os_test_TestChDir"
Remove(dir)
err = Mkdir(dir, 0755)
defer Remove(dir) // even though not quite sure which directory it will execute in
if err != nil {
t.Errorf("Mkdir(%s, 0755) returned %v", dir, err)
}
err = Chdir(dir)
if err != nil {
t.Fatalf("Chdir %s: %s", dir, err)
return
}
// create a file there
file := "_os_test_TestTempDir.dat"
f, err := OpenFile(file, O_RDWR|O_CREATE, 0644)
if err != nil {
t.Errorf("OpenFile %s: %s", file, err)
}
defer Remove(file) // even though not quite sure which directory it will execute in
err = f.Close()
if err != nil {
t.Errorf("Close %s: %s", file, err)
}
// cd back to original directory
err = Chdir("..")
if err != nil {
t.Errorf("Chdir ..: %s", err)
}
// clean up file and directory explicitly so we can check for errors
fullname := dir + "/" + file
err = Remove(fullname)
if err != nil {
t.Errorf("Remove %s: %s", fullname, err)
}
err = Remove(dir)
if err != nil {
t.Errorf("Remove %s: %s", dir, err)
}
}
func TestStandardFd(t *testing.T) {
if runtime.GOOS == "windows" {
t.Log("TODO: TestFd fails on Windows, skipping")
return
}
if fd := Stdin.Fd(); fd != 0 {
t.Errorf("Stdin.Fd() = %d, want 0", fd)
}
if fd := Stdout.Fd(); fd != 1 {
t.Errorf("Stdout.Fd() = %d, want 1", fd)
}
if fd := Stderr.Fd(); fd != 2 {
t.Errorf("Stderr.Fd() = %d, want 2", fd)
}
}
func TestFd(t *testing.T) {
if runtime.GOOS == "windows" {
t.Log("TODO: TestFd fails on Windows, skipping")
return
}
f := newFile("TestFd.txt", t)
defer Remove(f.Name())
defer f.Close()
const data = "hello, world\n"
io.WriteString(f, data)
fd := NewFile(f.Fd(), "as-fd")
defer fd.Close()
b := make([]byte, 5)
n, err := fd.ReadAt(b, 0)
if n != 5 && err != nil {
t.Errorf("Failed to read 5 bytes from file descriptor: %v", err)
}
if string(b) != data[:5] {
t.Errorf("File descriptor contents not equal to file contents.")
}
}
// closeTests is the list of tests used to validate that after calling Close,
// calling any method of File returns ErrClosed.
var closeTests = map[string]func(*File) error{
"Close": func(f *File) error {
return f.Close()
},
"Read": func(f *File) error {
_, err := f.Read(nil)
return err
},
"ReadAt": func(f *File) error {
_, err := f.ReadAt(nil, 0)
return err
},
"Seek": func(f *File) error {
_, err := f.Seek(0, 0)
return err
},
"Sync": func(f *File) error {
return f.Sync()
},
"SyscallConn": func(f *File) error {
_, err := f.SyscallConn()
return err
},
"Truncate": func(f *File) error {
return f.Truncate(0)
},
"Write": func(f *File) error {
_, err := f.Write(nil)
return err
},
"WriteAt": func(f *File) error {
_, err := f.WriteAt(nil, 0)
return err
},
"WriteString": func(f *File) error {
_, err := f.WriteString("")
return err
},
}
func TestClose(t *testing.T) {
f := newFile("TestClose.txt", t)
if err := f.Close(); err != nil {
t.Error("unexpected error closing the file:", err)
}
if fd := f.Fd(); fd != ^uintptr(0) {
t.Error("unexpected file handle after closing the file:", fd)
}
for name, test := range closeTests {
if err := test(f); !errors.Is(err, ErrClosed) {
t.Errorf("unexpected error returned by calling %s on a closed file: %v", name, err)
}
}
}
|
