| // Copyright 2009 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 os_test |
| |
| import ( |
| "bytes" |
| "fmt" |
| "io" |
| "io/ioutil" |
| . "os" |
| "path/filepath" |
| "strings" |
| "syscall" |
| "testing" |
| ) |
| |
| var dot = []string{ |
| "dir_unix.go", |
| "env_unix.go", |
| "error.go", |
| "file.go", |
| "os_test.go", |
| "time.go", |
| "types.go", |
| "stat_darwin.go", |
| "stat_linux.go", |
| } |
| |
| type sysDir struct { |
| name string |
| files []string |
| } |
| |
| var sysdir = func() (sd *sysDir) { |
| switch syscall.OS { |
| case "windows": |
| sd = &sysDir{ |
| Getenv("SystemRoot") + "\\system32\\drivers\\etc", |
| []string{ |
| "hosts", |
| "networks", |
| "protocol", |
| "services", |
| }, |
| } |
| case "plan9": |
| sd = &sysDir{ |
| "/lib/ndb", |
| []string{ |
| "common", |
| "local", |
| }, |
| } |
| default: |
| sd = &sysDir{ |
| "/etc", |
| []string{ |
| "group", |
| "hosts", |
| "passwd", |
| }, |
| } |
| } |
| return |
| }() |
| |
| func size(name string, t *testing.T) int64 { |
| file, err := Open(name) |
| defer file.Close() |
| if err != nil { |
| t.Fatal("open failed:", err) |
| } |
| var buf [100]byte |
| len := 0 |
| for { |
| n, e := file.Read(buf[0:]) |
| len += n |
| if e == EOF { |
| break |
| } |
| if e != nil { |
| t.Fatal("read failed:", err) |
| } |
| } |
| return int64(len) |
| } |
| |
| func equal(name1, name2 string) (r bool) { |
| switch syscall.OS { |
| case "windows": |
| r = strings.ToLower(name1) == strings.ToLower(name2) |
| default: |
| r = name1 == name2 |
| } |
| return |
| } |
| |
| func newFile(testName string, t *testing.T) (f *File) { |
| // Use a local file system, not NFS. |
| // On Unix, override $TMPDIR in case the user |
| // has it set to an NFS-mounted directory. |
| dir := "" |
| if syscall.OS != "windows" { |
| dir = "/tmp" |
| } |
| f, err := ioutil.TempFile(dir, "_Go_"+testName) |
| if err != nil { |
| t.Fatalf("open %s: %s", testName, err) |
| } |
| return |
| } |
| |
| var sfdir = sysdir.name |
| var sfname = sysdir.files[0] |
| |
| func TestStat(t *testing.T) { |
| path := sfdir + "/" + sfname |
| dir, err := Stat(path) |
| if err != nil { |
| t.Fatal("stat failed:", err) |
| } |
| if !equal(sfname, dir.Name) { |
| t.Error("name should be ", sfname, "; is", dir.Name) |
| } |
| filesize := size(path, t) |
| if dir.Size != filesize { |
| t.Error("size should be", filesize, "; is", dir.Size) |
| } |
| } |
| |
| func TestFstat(t *testing.T) { |
| path := sfdir + "/" + sfname |
| file, err1 := Open(path) |
| defer file.Close() |
| if err1 != nil { |
| t.Fatal("open failed:", err1) |
| } |
| dir, err2 := file.Stat() |
| if err2 != nil { |
| t.Fatal("fstat failed:", err2) |
| } |
| if !equal(sfname, dir.Name) { |
| t.Error("name should be ", sfname, "; is", dir.Name) |
| } |
| filesize := size(path, t) |
| if dir.Size != filesize { |
| t.Error("size should be", filesize, "; is", dir.Size) |
| } |
| } |
| |
| func TestLstat(t *testing.T) { |
| path := sfdir + "/" + sfname |
| dir, err := Lstat(path) |
| if err != nil { |
| t.Fatal("lstat failed:", err) |
| } |
| if !equal(sfname, dir.Name) { |
| t.Error("name should be ", sfname, "; is", dir.Name) |
| } |
| filesize := size(path, t) |
| if dir.Size != filesize { |
| t.Error("size should be", filesize, "; is", dir.Size) |
| } |
| } |
| |
| func testReaddirnames(dir string, contents []string, t *testing.T) { |
| file, err := Open(dir) |
| defer file.Close() |
| if err != nil { |
| t.Fatalf("open %q failed: %v", dir, err) |
| } |
| s, err2 := file.Readdirnames(-1) |
| if err2 != nil { |
| t.Fatalf("readdirnames %q failed: %v", dir, err2) |
| } |
| for _, m := range contents { |
| found := false |
| for _, n := range s { |
| if n == "." || n == ".." { |
| t.Errorf("got %s in directory", n) |
| } |
| if equal(m, n) { |
| if found { |
| t.Error("present twice:", m) |
| } |
| found = true |
| } |
| } |
| if !found { |
| t.Error("could not find", m) |
| } |
| } |
| } |
| |
| func testReaddir(dir string, contents []string, t *testing.T) { |
| file, err := Open(dir) |
| defer file.Close() |
| if err != nil { |
| t.Fatalf("open %q failed: %v", dir, err) |
| } |
| s, err2 := file.Readdir(-1) |
| if err2 != nil { |
| t.Fatalf("readdir %q failed: %v", dir, err2) |
| } |
| for _, m := range contents { |
| found := false |
| for _, n := range s { |
| if equal(m, n.Name) { |
| if found { |
| t.Error("present twice:", m) |
| } |
| found = true |
| } |
| } |
| if !found { |
| t.Error("could not find", m) |
| } |
| } |
| } |
| |
| func TestReaddirnames(t *testing.T) { |
| testReaddirnames(".", dot, t) |
| testReaddirnames(sysdir.name, sysdir.files, t) |
| } |
| |
| func TestReaddir(t *testing.T) { |
| testReaddir(".", dot, t) |
| testReaddir(sysdir.name, sysdir.files, t) |
| } |
| |
| // Read the directory one entry at a time. |
| func smallReaddirnames(file *File, length int, t *testing.T) []string { |
| names := make([]string, length) |
| count := 0 |
| for { |
| d, err := file.Readdirnames(1) |
| if err == EOF { |
| break |
| } |
| if err != nil { |
| t.Fatalf("readdirnames %q failed: %v", file.Name(), err) |
| } |
| if len(d) == 0 { |
| t.Fatalf("readdirnames %q returned empty slice and no error", file.Name()) |
| } |
| names[count] = d[0] |
| count++ |
| } |
| return names[0:count] |
| } |
| |
| // Check that reading a directory one entry at a time gives the same result |
| // as reading it all at once. |
| func TestReaddirnamesOneAtATime(t *testing.T) { |
| // big directory that doesn't change often. |
| dir := "/usr/bin" |
| switch syscall.OS { |
| case "windows": |
| dir = Getenv("SystemRoot") + "\\system32" |
| case "plan9": |
| dir = "/bin" |
| } |
| file, err := Open(dir) |
| defer file.Close() |
| if err != nil { |
| t.Fatalf("open %q failed: %v", dir, err) |
| } |
| all, err1 := file.Readdirnames(-1) |
| if err1 != nil { |
| t.Fatalf("readdirnames %q failed: %v", dir, err1) |
| } |
| file1, err2 := Open(dir) |
| if err2 != nil { |
| t.Fatalf("open %q failed: %v", dir, err2) |
| } |
| small := smallReaddirnames(file1, len(all)+100, t) // +100 in case we screw up |
| if len(small) < len(all) { |
| t.Fatalf("len(small) is %d, less than %d", len(small), len(all)) |
| } |
| for i, n := range all { |
| if small[i] != n { |
| t.Errorf("small read %q mismatch: %v", small[i], n) |
| } |
| } |
| } |
| |
| func TestReaddirNValues(t *testing.T) { |
| if testing.Short() { |
| t.Logf("test.short; skipping") |
| return |
| } |
| dir, err := ioutil.TempDir("", "") |
| if err != nil { |
| t.Fatalf("TempDir: %v", err) |
| } |
| defer RemoveAll(dir) |
| for i := 1; i <= 105; i++ { |
| f, err := Create(filepath.Join(dir, fmt.Sprintf("%d", i))) |
| if err != nil { |
| t.Fatalf("Create: %v", err) |
| } |
| f.Write([]byte(strings.Repeat("X", i))) |
| f.Close() |
| } |
| |
| var d *File |
| openDir := func() { |
| var err Error |
| d, err = Open(dir) |
| if err != nil { |
| t.Fatalf("Open directory: %v", err) |
| } |
| } |
| |
| readDirExpect := func(n, want int, wantErr Error) { |
| fi, err := d.Readdir(n) |
| if err != wantErr { |
| t.Fatalf("Readdir of %d got error %v, want %v", n, err, wantErr) |
| } |
| if g, e := len(fi), want; g != e { |
| t.Errorf("Readdir of %d got %d files, want %d", n, g, e) |
| } |
| } |
| |
| readDirNamesExpect := func(n, want int, wantErr Error) { |
| fi, err := d.Readdirnames(n) |
| if err != wantErr { |
| t.Fatalf("Readdirnames of %d got error %v, want %v", n, err, wantErr) |
| } |
| if g, e := len(fi), want; g != e { |
| t.Errorf("Readdirnames of %d got %d files, want %d", n, g, e) |
| } |
| } |
| |
| for _, fn := range []func(int, int, Error){readDirExpect, readDirNamesExpect} { |
| // Test the slurp case |
| openDir() |
| fn(0, 105, nil) |
| fn(0, 0, nil) |
| d.Close() |
| |
| // Slurp with -1 instead |
| openDir() |
| fn(-1, 105, nil) |
| fn(-2, 0, nil) |
| fn(0, 0, nil) |
| d.Close() |
| |
| // Test the bounded case |
| openDir() |
| fn(1, 1, nil) |
| fn(2, 2, nil) |
| fn(105, 102, nil) // and tests buffer >100 case |
| fn(3, 0, EOF) |
| d.Close() |
| } |
| } |
| |
| func TestHardLink(t *testing.T) { |
| // Hardlinks are not supported under windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| from, to := "hardlinktestfrom", "hardlinktestto" |
| Remove(from) // Just in case. |
| file, err := Create(to) |
| if err != nil { |
| t.Fatalf("open %q failed: %v", to, err) |
| } |
| defer Remove(to) |
| if err = file.Close(); err != nil { |
| t.Errorf("close %q failed: %v", to, err) |
| } |
| err = Link(to, from) |
| if err != nil { |
| t.Fatalf("link %q, %q failed: %v", to, from, err) |
| } |
| defer Remove(from) |
| tostat, err := Stat(to) |
| if err != nil { |
| t.Fatalf("stat %q failed: %v", to, err) |
| } |
| fromstat, err := Stat(from) |
| if err != nil { |
| t.Fatalf("stat %q failed: %v", from, err) |
| } |
| if tostat.Dev != fromstat.Dev || tostat.Ino != fromstat.Ino { |
| t.Errorf("link %q, %q did not create hard link", to, from) |
| } |
| } |
| |
| func TestSymLink(t *testing.T) { |
| // Symlinks are not supported under windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| from, to := "symlinktestfrom", "symlinktestto" |
| Remove(from) // Just in case. |
| file, err := Create(to) |
| if err != nil { |
| t.Fatalf("open %q failed: %v", to, err) |
| } |
| defer Remove(to) |
| if err = file.Close(); err != nil { |
| t.Errorf("close %q failed: %v", to, err) |
| } |
| err = Symlink(to, from) |
| if err != nil { |
| t.Fatalf("symlink %q, %q failed: %v", to, from, err) |
| } |
| defer Remove(from) |
| tostat, err := Stat(to) |
| if err != nil { |
| t.Fatalf("stat %q failed: %v", to, err) |
| } |
| if tostat.FollowedSymlink { |
| t.Fatalf("stat %q claims to have followed a symlink", to) |
| } |
| fromstat, err := Stat(from) |
| if err != nil { |
| t.Fatalf("stat %q failed: %v", from, err) |
| } |
| if tostat.Dev != fromstat.Dev || tostat.Ino != fromstat.Ino { |
| t.Errorf("symlink %q, %q did not create symlink", to, from) |
| } |
| fromstat, err = Lstat(from) |
| if err != nil { |
| t.Fatalf("lstat %q failed: %v", from, err) |
| } |
| if !fromstat.IsSymlink() { |
| t.Fatalf("symlink %q, %q did not create symlink", to, from) |
| } |
| fromstat, err = Stat(from) |
| if err != nil { |
| t.Fatalf("stat %q failed: %v", from, err) |
| } |
| if !fromstat.FollowedSymlink { |
| t.Fatalf("stat %q did not follow symlink", from) |
| } |
| s, err := Readlink(from) |
| if err != nil { |
| t.Fatalf("readlink %q failed: %v", from, err) |
| } |
| if s != to { |
| t.Fatalf("after symlink %q != %q", s, to) |
| } |
| file, err = Open(from) |
| if err != nil { |
| t.Fatalf("open %q failed: %v", from, err) |
| } |
| file.Close() |
| } |
| |
| func TestLongSymlink(t *testing.T) { |
| // Symlinks are not supported under windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| s := "0123456789abcdef" |
| // Long, but not too long: a common limit is 255. |
| s = s + s + s + s + s + s + s + s + s + s + s + s + s + s + s |
| from := "longsymlinktestfrom" |
| Remove(from) // Just in case. |
| err := Symlink(s, from) |
| if err != nil { |
| t.Fatalf("symlink %q, %q failed: %v", s, from, err) |
| } |
| defer Remove(from) |
| r, err := Readlink(from) |
| if err != nil { |
| t.Fatalf("readlink %q failed: %v", from, err) |
| } |
| if r != s { |
| t.Fatalf("after symlink %q != %q", r, s) |
| } |
| } |
| |
| func TestRename(t *testing.T) { |
| from, to := "renamefrom", "renameto" |
| Remove(to) // Just in case. |
| file, err := Create(from) |
| if err != nil { |
| t.Fatalf("open %q failed: %v", to, err) |
| } |
| if err = file.Close(); err != nil { |
| t.Errorf("close %q failed: %v", to, err) |
| } |
| err = Rename(from, to) |
| if err != nil { |
| t.Fatalf("rename %q, %q failed: %v", to, from, err) |
| } |
| defer Remove(to) |
| _, err = Stat(to) |
| if err != nil { |
| t.Errorf("stat %q failed: %v", to, err) |
| } |
| } |
| |
| func exec(t *testing.T, dir, cmd string, args []string, expect string) { |
| r, w, err := Pipe() |
| if err != nil { |
| t.Fatalf("Pipe: %v", err) |
| } |
| attr := &ProcAttr{Dir: dir, Files: []*File{nil, w, Stderr}} |
| p, err := StartProcess(cmd, args, attr) |
| if err != nil { |
| t.Fatalf("StartProcess: %v", err) |
| } |
| defer p.Release() |
| w.Close() |
| |
| var b bytes.Buffer |
| io.Copy(&b, r) |
| output := b.String() |
| // Accept /usr prefix because Solaris /bin is symlinked to /usr/bin. |
| if output != expect && output != "/usr"+expect { |
| t.Errorf("exec %q returned %q wanted %q", |
| strings.Join(append([]string{cmd}, args...), " "), output, expect) |
| } |
| p.Wait(0) |
| } |
| |
| func TestStartProcess(t *testing.T) { |
| var dir, cmd, le string |
| var args []string |
| if syscall.OS == "windows" { |
| le = "\r\n" |
| cmd = Getenv("COMSPEC") |
| dir = Getenv("SystemRoot") |
| args = []string{"/c", "cd"} |
| } else { |
| le = "\n" |
| cmd = "/bin/pwd" |
| dir = "/" |
| args = []string{} |
| } |
| cmddir, cmdbase := filepath.Split(cmd) |
| args = append([]string{cmdbase}, args...) |
| // Test absolute executable path. |
| exec(t, dir, cmd, args, dir+le) |
| // Test relative executable path. |
| exec(t, cmddir, cmdbase, args, filepath.Clean(cmddir)+le) |
| } |
| |
| func checkMode(t *testing.T, path string, mode uint32) { |
| dir, err := Stat(path) |
| if err != nil { |
| t.Fatalf("Stat %q (looking for mode %#o): %s", path, mode, err) |
| } |
| if dir.Mode&0777 != mode { |
| t.Errorf("Stat %q: mode %#o want %#o", path, dir.Mode, mode) |
| } |
| } |
| |
| func TestChmod(t *testing.T) { |
| // Chmod is not supported under windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| f := newFile("TestChmod", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| if err := Chmod(f.Name(), 0456); err != nil { |
| t.Fatalf("chmod %s 0456: %s", f.Name(), err) |
| } |
| checkMode(t, f.Name(), 0456) |
| |
| if err := f.Chmod(0123); err != nil { |
| t.Fatalf("chmod %s 0123: %s", f.Name(), err) |
| } |
| checkMode(t, f.Name(), 0123) |
| } |
| |
| func checkUidGid(t *testing.T, path string, uid, gid int) { |
| dir, err := Stat(path) |
| if err != nil { |
| t.Fatalf("Stat %q (looking for uid/gid %d/%d): %s", path, uid, gid, err) |
| } |
| if dir.Uid != uid { |
| t.Errorf("Stat %q: uid %d want %d", path, dir.Uid, uid) |
| } |
| if dir.Gid != gid { |
| t.Errorf("Stat %q: gid %d want %d", path, dir.Gid, gid) |
| } |
| } |
| |
| func TestChown(t *testing.T) { |
| // Chown is not supported under windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| // Use TempDir() to make sure we're on a local file system, |
| // so that the group ids returned by Getgroups will be allowed |
| // on the file. On NFS, the Getgroups groups are |
| // basically useless. |
| f := newFile("TestChown", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| dir, err := f.Stat() |
| if err != nil { |
| t.Fatalf("stat %s: %s", f.Name(), err) |
| } |
| |
| // Can't change uid unless root, but can try |
| // changing the group id. First try our current group. |
| gid := Getgid() |
| t.Log("gid:", gid) |
| if err = Chown(f.Name(), -1, gid); err != nil { |
| t.Fatalf("chown %s -1 %d: %s", f.Name(), gid, err) |
| } |
| checkUidGid(t, f.Name(), dir.Uid, gid) |
| |
| // Then try all the auxiliary groups. |
| groups, err := Getgroups() |
| if err != nil { |
| t.Fatalf("getgroups: %s", err) |
| } |
| t.Log("groups: ", groups) |
| for _, g := range groups { |
| if err = Chown(f.Name(), -1, g); err != nil { |
| t.Fatalf("chown %s -1 %d: %s", f.Name(), g, err) |
| } |
| checkUidGid(t, f.Name(), dir.Uid, g) |
| |
| // change back to gid to test fd.Chown |
| if err = f.Chown(-1, gid); err != nil { |
| t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err) |
| } |
| checkUidGid(t, f.Name(), dir.Uid, gid) |
| } |
| } |
| |
| func checkSize(t *testing.T, f *File, size int64) { |
| dir, err := f.Stat() |
| if err != nil { |
| t.Fatalf("Stat %q (looking for size %d): %s", f.Name(), size, err) |
| } |
| if dir.Size != size { |
| t.Errorf("Stat %q: size %d want %d", f.Name(), dir.Size, size) |
| } |
| } |
| |
| func TestFTruncate(t *testing.T) { |
| f := newFile("TestFTruncate", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| checkSize(t, f, 0) |
| f.Write([]byte("hello, world\n")) |
| checkSize(t, f, 13) |
| f.Truncate(10) |
| checkSize(t, f, 10) |
| f.Truncate(1024) |
| checkSize(t, f, 1024) |
| f.Truncate(0) |
| checkSize(t, f, 0) |
| f.Write([]byte("surprise!")) |
| checkSize(t, f, 13+9) // wrote at offset past where hello, world was. |
| } |
| |
| func TestTruncate(t *testing.T) { |
| f := newFile("TestTruncate", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| checkSize(t, f, 0) |
| f.Write([]byte("hello, world\n")) |
| checkSize(t, f, 13) |
| Truncate(f.Name(), 10) |
| checkSize(t, f, 10) |
| Truncate(f.Name(), 1024) |
| checkSize(t, f, 1024) |
| Truncate(f.Name(), 0) |
| checkSize(t, f, 0) |
| f.Write([]byte("surprise!")) |
| checkSize(t, f, 13+9) // wrote at offset past where hello, world was. |
| } |
| |
| // Use TempDir() to make sure we're on a local file system, |
| // so that timings are not distorted by latency and caching. |
| // On NFS, timings can be off due to caching of meta-data on |
| // NFS servers (Issue 848). |
| func TestChtimes(t *testing.T) { |
| f := newFile("TestChtimes", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| f.Write([]byte("hello, world\n")) |
| f.Close() |
| |
| preStat, err := Stat(f.Name()) |
| if err != nil { |
| t.Fatalf("Stat %s: %s", f.Name(), err) |
| } |
| |
| // Move access and modification time back a second |
| const OneSecond = 1e9 // in nanoseconds |
| err = Chtimes(f.Name(), preStat.Atime_ns-OneSecond, preStat.Mtime_ns-OneSecond) |
| if err != nil { |
| t.Fatalf("Chtimes %s: %s", f.Name(), err) |
| } |
| |
| postStat, err := Stat(f.Name()) |
| if err != nil { |
| t.Fatalf("second Stat %s: %s", f.Name(), err) |
| } |
| |
| if postStat.Atime_ns >= preStat.Atime_ns { |
| t.Errorf("Atime_ns didn't go backwards; was=%d, after=%d", |
| preStat.Atime_ns, |
| postStat.Atime_ns) |
| } |
| |
| if postStat.Mtime_ns >= preStat.Mtime_ns { |
| t.Errorf("Mtime_ns didn't go backwards; was=%d, after=%d", |
| preStat.Mtime_ns, |
| postStat.Mtime_ns) |
| } |
| } |
| |
| func TestChdirAndGetwd(t *testing.T) { |
| // TODO(brainman): file.Chdir() is not implemented on windows. |
| if syscall.OS == "windows" { |
| return |
| } |
| fd, err := Open(".") |
| if err != nil { |
| t.Fatalf("Open .: %s", err) |
| } |
| // These are chosen carefully not to be symlinks on a Mac |
| // (unlike, say, /var, /etc, and /tmp). |
| dirs := []string{"/", "/usr/bin"} |
| for mode := 0; mode < 2; mode++ { |
| for _, d := range dirs { |
| if mode == 0 { |
| err = Chdir(d) |
| } else { |
| fd1, err := Open(d) |
| if err != nil { |
| t.Errorf("Open %s: %s", d, err) |
| continue |
| } |
| err = fd1.Chdir() |
| fd1.Close() |
| } |
| pwd, err1 := Getwd() |
| err2 := fd.Chdir() |
| if err2 != nil { |
| // We changed the current directory and cannot go back. |
| // Don't let the tests continue; they'll scribble |
| // all over some other directory. |
| fmt.Fprintf(Stderr, "fchdir back to dot failed: %s\n", err2) |
| Exit(1) |
| } |
| if err != nil { |
| fd.Close() |
| t.Fatalf("Chdir %s: %s", d, err) |
| } |
| if err1 != nil { |
| fd.Close() |
| t.Fatalf("Getwd in %s: %s", d, err1) |
| } |
| if pwd != d { |
| fd.Close() |
| t.Fatalf("Getwd returned %q want %q", pwd, d) |
| } |
| } |
| } |
| fd.Close() |
| } |
| |
| func TestTime(t *testing.T) { |
| // Just want to check that Time() is getting something. |
| // A common failure mode on Darwin is to get 0, 0, |
| // because it returns the time in registers instead of |
| // filling in the structure passed to the system call. |
| // Too bad the compiler doesn't know that |
| // 365.24*86400 is an integer. |
| sec, nsec, err := Time() |
| if sec < (2009-1970)*36524*864 { |
| t.Errorf("Time() = %d, %d, %s; not plausible", sec, nsec, err) |
| } |
| } |
| |
| func TestSeek(t *testing.T) { |
| f := newFile("TestSeek", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| const data = "hello, world\n" |
| io.WriteString(f, data) |
| |
| type test struct { |
| in int64 |
| whence int |
| out int64 |
| } |
| var tests = []test{ |
| {0, 1, int64(len(data))}, |
| {0, 0, 0}, |
| {5, 0, 5}, |
| {0, 2, int64(len(data))}, |
| {0, 0, 0}, |
| {-1, 2, int64(len(data)) - 1}, |
| {1 << 33, 0, 1 << 33}, |
| {1 << 33, 2, 1<<33 + int64(len(data))}, |
| } |
| for i, tt := range tests { |
| off, err := f.Seek(tt.in, tt.whence) |
| if off != tt.out || err != nil { |
| if e, ok := err.(*PathError); ok && e.Error == EINVAL && tt.out > 1<<32 { |
| // Reiserfs rejects the big seeks. |
| // http://code.google.com/p/go/issues/detail?id=91 |
| break |
| } |
| t.Errorf("#%d: Seek(%v, %v) = %v, %v want %v, nil", i, tt.in, tt.whence, off, err, tt.out) |
| } |
| } |
| } |
| |
| type openErrorTest struct { |
| path string |
| mode int |
| error Error |
| } |
| |
| var openErrorTests = []openErrorTest{ |
| { |
| sfdir + "/no-such-file", |
| O_RDONLY, |
| ENOENT, |
| }, |
| { |
| sfdir, |
| O_WRONLY, |
| EISDIR, |
| }, |
| { |
| sfdir + "/" + sfname + "/no-such-file", |
| O_WRONLY, |
| ENOTDIR, |
| }, |
| } |
| |
| func TestOpenError(t *testing.T) { |
| for _, tt := range openErrorTests { |
| f, err := OpenFile(tt.path, tt.mode, 0) |
| if err == nil { |
| t.Errorf("Open(%q, %d) succeeded", tt.path, tt.mode) |
| f.Close() |
| continue |
| } |
| perr, ok := err.(*PathError) |
| if !ok { |
| t.Errorf("Open(%q, %d) returns error of %T type; want *os.PathError", tt.path, tt.mode, err) |
| } |
| if perr.Error != tt.error { |
| t.Errorf("Open(%q, %d) = _, %q; want %q", tt.path, tt.mode, perr.Error.String(), tt.error.String()) |
| } |
| } |
| } |
| |
| func run(t *testing.T, cmd []string) string { |
| // Run /bin/hostname and collect output. |
| r, w, err := Pipe() |
| if err != nil { |
| t.Fatal(err) |
| } |
| p, err := StartProcess("/bin/hostname", []string{"hostname"}, &ProcAttr{Files: []*File{nil, w, Stderr}}) |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer p.Release() |
| w.Close() |
| |
| var b bytes.Buffer |
| io.Copy(&b, r) |
| p.Wait(0) |
| output := b.String() |
| if n := len(output); n > 0 && output[n-1] == '\n' { |
| output = output[0 : n-1] |
| } |
| if output == "" { |
| t.Fatalf("%v produced no output", cmd) |
| } |
| |
| return output |
| } |
| |
| |
| func TestHostname(t *testing.T) { |
| // There is no other way to fetch hostname on windows, but via winapi. |
| if syscall.OS == "windows" { |
| return |
| } |
| // Check internal Hostname() against the output of /bin/hostname. |
| // Allow that the internal Hostname returns a Fully Qualified Domain Name |
| // and the /bin/hostname only returns the first component |
| hostname, err := Hostname() |
| if err != nil { |
| t.Fatalf("%v", err) |
| } |
| want := run(t, []string{"/bin/hostname"}) |
| if hostname != want { |
| i := strings.Index(hostname, ".") |
| if i < 0 || hostname[0:i] != want { |
| t.Errorf("Hostname() = %q, want %q", hostname, want) |
| } |
| } |
| } |
| |
| func TestReadAt(t *testing.T) { |
| f := newFile("TestReadAt", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| const data = "hello, world\n" |
| io.WriteString(f, data) |
| |
| b := make([]byte, 5) |
| n, err := f.ReadAt(b, 7) |
| if err != nil || n != len(b) { |
| t.Fatalf("ReadAt 7: %d, %r", n, err) |
| } |
| if string(b) != "world" { |
| t.Fatalf("ReadAt 7: have %q want %q", string(b), "world") |
| } |
| } |
| |
| func TestWriteAt(t *testing.T) { |
| f := newFile("TestWriteAt", t) |
| defer Remove(f.Name()) |
| defer f.Close() |
| |
| const data = "hello, world\n" |
| io.WriteString(f, data) |
| |
| n, err := f.WriteAt([]byte("WORLD"), 7) |
| if err != nil || n != 5 { |
| t.Fatalf("WriteAt 7: %d, %v", n, err) |
| } |
| |
| b, err := ioutil.ReadFile(f.Name()) |
| if err != nil { |
| t.Fatalf("ReadFile %s: %v", f.Name(), err) |
| } |
| if string(b) != "hello, WORLD\n" { |
| t.Fatalf("after write: have %q want %q", string(b), "hello, WORLD\n") |
| } |
| } |
| |
| func writeFile(t *testing.T, fname string, flag int, text string) string { |
| f, err := OpenFile(fname, flag, 0666) |
| if err != nil { |
| t.Fatalf("Open: %v", err) |
| } |
| n, err := io.WriteString(f, text) |
| if err != nil { |
| t.Fatalf("WriteString: %d, %v", n, err) |
| } |
| f.Close() |
| data, err := ioutil.ReadFile(fname) |
| if err != nil { |
| t.Fatalf("ReadFile: %v", err) |
| } |
| return string(data) |
| } |
| |
| func TestAppend(t *testing.T) { |
| const f = "append.txt" |
| defer Remove(f) |
| s := writeFile(t, f, O_CREATE|O_TRUNC|O_RDWR, "new") |
| if s != "new" { |
| t.Fatalf("writeFile: have %q want %q", s, "new") |
| } |
| s = writeFile(t, f, O_APPEND|O_RDWR, "|append") |
| if s != "new|append" { |
| t.Fatalf("writeFile: have %q want %q", s, "new|append") |
| } |
| s = writeFile(t, f, O_CREATE|O_APPEND|O_RDWR, "|append") |
| if s != "new|append|append" { |
| t.Fatalf("writeFile: have %q want %q", s, "new|append|append") |
| } |
| err := Remove(f) |
| if err != nil { |
| t.Fatalf("Remove: %v", err) |
| } |
| s = writeFile(t, f, O_CREATE|O_APPEND|O_RDWR, "new&append") |
| if s != "new&append" { |
| t.Fatalf("writeFile: after append have %q want %q", s, "new&append") |
| } |
| s = writeFile(t, f, O_CREATE|O_RDWR, "old") |
| if s != "old&append" { |
| t.Fatalf("writeFile: after create have %q want %q", s, "old&append") |
| } |
| s = writeFile(t, f, O_CREATE|O_TRUNC|O_RDWR, "new") |
| if s != "new" { |
| t.Fatalf("writeFile: after truncate have %q want %q", s, "new") |
| } |
| } |
| |
| func TestStatDirWithTrailingSlash(t *testing.T) { |
| // Create new dir, in _test so it will get |
| // cleaned up by make if not by us. |
| path := "_test/_TestStatDirWithSlash_" |
| err := MkdirAll(path, 0777) |
| if err != nil { |
| t.Fatalf("MkdirAll %q: %s", path, err) |
| } |
| defer RemoveAll(path) |
| |
| // Stat of path should succeed. |
| _, err = Stat(path) |
| if err != nil { |
| t.Fatal("stat failed:", err) |
| } |
| |
| // Stat of path+"/" should succeed too. |
| _, err = Stat(path + "/") |
| if err != nil { |
| t.Fatal("stat failed:", err) |
| } |
| } |
