diff options
Diffstat (limited to 'src/pkg/os/os_test.go')
-rw-r--r-- | src/pkg/os/os_test.go | 1058 |
1 files changed, 1058 insertions, 0 deletions
diff --git a/src/pkg/os/os_test.go b/src/pkg/os/os_test.go new file mode 100644 index 000000000..4d60333df --- /dev/null +++ b/src/pkg/os/os_test.go @@ -0,0 +1,1058 @@ +// 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 or Plan 9. + if syscall.OS == "windows" || syscall.OS == "plan9" { + 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 or Plan 9. + if syscall.OS == "windows" || syscall.OS == "plan9" { + 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 or Plan 9. + if syscall.OS == "windows" || syscall.OS == "plan9" { + 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 or Plan 9. + // Plan9 provides a native ChownPlan9 version instead. + if syscall.OS == "windows" || syscall.OS == "plan9" { + 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) + } + + /* Plan 9: + Mtime is the time of the last change of content. Similarly, atime is set whenever the + contents are accessed; also, it is set whenever mtime is set. + */ + if postStat.Atime_ns >= preStat.Atime_ns && syscall.OS != "plan9" { + 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"} + // /usr/bin does not usually exist on Plan 9. + if syscall.OS == "plan9" { + dirs = []string{"/", "/usr"} + } + 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 { + if syscall.OS == "plan9" { + syscallErrStr := perr.Error.String() + expectedErrStr := strings.Replace(tt.error.String(), "file ", "", 1) + if !strings.HasSuffix(syscallErrStr, expectedErrStr) { + t.Errorf("Open(%q, %d) = _, %q; want suffix %q", tt.path, tt.mode, syscallErrStr, expectedErrStr) + } + } else { + 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) + _, err = p.Wait(0) + if err != nil { + t.Fatalf("run hostname Wait: %v", err) + } + err = p.Kill() + if err == nil { + t.Errorf("expected an error from Kill running 'hostname'") + } + 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. + // On Plan 9 it is can be taken from #c/sysname as Hostname() does. + if syscall.OS == "windows" || syscall.OS == "plan9" { + 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) + } +} + +func TestNilWaitmsgString(t *testing.T) { + var w *Waitmsg + s := w.String() + if s != "<nil>" { + t.Errorf("(*Waitmsg)(nil).String() = %q, want %q", s, "<nil>") + } +} |