Golang fusetesting.ReadDirPicky函数代码示例

func (t *ImplicitDirsTest) Rmdir_Empty() {
	var err error
	var entries []os.FileInfo

	// Create two levels of directories. We can't make an empty implicit dir, so
	// there must be a backing object for each.
	AssertEq(
		nil,
		t.createObjects(
			map[string]string{
				"foo/":     "",
				"foo/bar/": "",
			}))

	// Remove the leaf.
	err = os.Remove(path.Join(t.Dir, "foo/bar"))
	AssertEq(nil, err)

	// There should be nothing left in the parent.
	entries, err = fusetesting.ReadDirPicky(path.Join(t.Dir, "foo"))

	AssertEq(nil, err)
	ExpectThat(entries, ElementsAre())

	// Remove the parent.
	err = os.Remove(path.Join(t.Dir, "foo"))
	AssertEq(nil, err)

	// Now the root directory should be empty, too.
	entries, err = fusetesting.ReadDirPicky(t.Dir)

	AssertEq(nil, err)
	ExpectThat(entries, ElementsAre())
}

func (t *ForeignModsTest) ReadDir_EmptySubDirectory() {
	// Set up an empty directory placeholder called 'bar'.
	AssertEq(nil, t.createEmptyObjects([]string{"bar/"}))

	// ReadDir
	entries, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)
	AssertEq(1, len(entries))

	entries, err = fusetesting.ReadDirPicky(path.Join(t.mfs.Dir(), "bar"))
	AssertEq(nil, err)

	ExpectThat(entries, ElementsAre())
}

func (t *ForeignModsTest) ReadDir_EmptyRoot() {
	// ReadDir
	entries, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	ExpectThat(entries, ElementsAre())
}

func (t *CachingTest) EmptyBucket() {
	// ReadDir
	entries, err := fusetesting.ReadDirPicky(t.Dir)
	AssertEq(nil, err)

	ExpectThat(entries, ElementsAre())
}

func (t *ForeignModsTest) Inodes() {
	// Set up two files and a directory placeholder.
	AssertEq(
		nil,
		t.createEmptyObjects([]string{
			"foo",
			"bar/",
			"baz",
		}))

	// List.
	entries, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	AssertEq(3, len(entries), "Names: %v", getFileNames(entries))

	// Confirm all of the inodes are distinct.
	inodesSeen := make(map[uint64]struct{})
	for _, fileInfo := range entries {
		stat := fileInfo.Sys().(*syscall.Stat_t)
		_, ok := inodesSeen[stat.Ino]
		AssertFalse(
			ok,
			"Duplicate inode (%v). File info: %v",
			stat.Ino,
			fileInfo)

		inodesSeen[stat.Ino] = struct{}{}
	}
}

func (t *GcsfuseTest) OnlyDir_WithImplicitDir() {
	var err error
	var fi os.FileInfo

	// Mount only a single implicit directory from the bucket.
	args := []string{
		"--only-dir",
		path.Dir(canned.ImplicitDirFile),
		canned.FakeBucketName,
		t.dir,
	}

	err = t.runGcsfuse(args)
	AssertEq(nil, err)
	defer unmount(t.dir)

	// It should be as if t.dir points into the implicit directory
	entries, err := fusetesting.ReadDirPicky(t.dir)
	AssertEq(nil, err)

	AssertEq(1, len(entries))
	fi = entries[0]
	ExpectEq(path.Base(canned.ImplicitDirFile), fi.Name())
	ExpectEq(len(canned.ImplicitDirFile_Contents), fi.Size())
}

func (t *ForeignModsTest) ReadBeyondEndOfFile() {
	const contents = "tacoburritoenchilada"
	const contentLen = len(contents)

	// Create an object.
	AssertEq(nil, t.createWithContents("foo", contents))

	// Wait for it to show up in the file system.
	_, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	// Attempt to open it.
	f, err := os.Open(path.Join(t.mfs.Dir(), "foo"))
	AssertEq(nil, err)
	defer func() { AssertEq(nil, f.Close()) }()

	// Attempt to read beyond the end of the file.
	_, err = f.Seek(int64(contentLen-1), 0)
	AssertEq(nil, err)

	buf := make([]byte, 2)
	n, err := f.Read(buf)
	AssertEq(1, n, "err: %v", err)
	AssertEq(contents[contentLen-1], buf[0])

	if err == nil {
		n, err = f.Read(buf)
		AssertEq(0, n)
	}
}

func (t *GcsfuseTest) OnlyDir_TrailingSlash() {
	var err error
	var fi os.FileInfo

	// Mount only a single directory from the bucket, including a trailing slash.
	args := []string{
		"--only-dir",
		path.Dir(canned.ExplicitDirFile) + "/",
		canned.FakeBucketName,
		t.dir,
	}

	err = t.runGcsfuse(args)
	AssertEq(nil, err)
	defer unmount(t.dir)

	// It should be as if t.dir points into the bucket's first-level directory.
	entries, err := fusetesting.ReadDirPicky(t.dir)
	AssertEq(nil, err)

	AssertEq(1, len(entries))
	fi = entries[0]
	ExpectEq(path.Base(canned.ExplicitDirFile), fi.Name())
	ExpectEq(len(canned.ExplicitDirFile_Contents), fi.Size())
}

func (t *ImplicitDirsTest) DirectoryObjectPresent() {
	var fi os.FileInfo
	var entries []os.FileInfo
	var err error

	// Set up contents.
	AssertEq(
		nil,
		t.createObjects(
			map[string]string{
				// Directory
				"foo/": "",
			}))

	// Statting the name should return an entry for the directory.
	fi, err = os.Stat(path.Join(t.mfs.Dir(), "foo"))
	AssertEq(nil, err)

	ExpectEq("foo", fi.Name())
	ExpectTrue(fi.IsDir())

	// ReadDir should show the directory.
	entries, err = fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)
	AssertEq(1, len(entries))

	fi = entries[0]
	ExpectEq("foo", fi.Name())
	ExpectTrue(fi.IsDir())
}

func (t *ImplicitDirsTest) NothingPresent() {
	// ReadDir
	entries, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	ExpectThat(entries, ElementsAre())
}

func (t *ForeignModsTest) ReadDir_ContentsInRoot() {
	// Set up contents.
	createTime := t.mtimeClock.Now()
	AssertEq(
		nil,
		t.createObjects(
			map[string]string{
				// File
				"foo": "taco",

				// Directory
				"bar/": "",

				// File
				"baz": "burrito",
			}))

	/////////////////////////
	// ReadDir
	/////////////////////////

	entries, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	AssertEq(3, len(entries), "Names: %v", getFileNames(entries))
	var e os.FileInfo

	// bar
	e = entries[0]
	ExpectEq("bar", e.Name())
	ExpectEq(0, e.Size())
	ExpectEq(dirPerms|os.ModeDir, e.Mode())
	ExpectTrue(e.IsDir())
	ExpectEq(1, e.Sys().(*syscall.Stat_t).Nlink)
	ExpectEq(currentUid(), e.Sys().(*syscall.Stat_t).Uid)
	ExpectEq(currentGid(), e.Sys().(*syscall.Stat_t).Gid)

	// baz
	e = entries[1]
	ExpectEq("baz", e.Name())
	ExpectEq(len("burrito"), e.Size())
	ExpectEq(filePerms, e.Mode())
	ExpectThat(e, fusetesting.MtimeIsWithin(createTime, timeSlop))
	ExpectFalse(e.IsDir())
	ExpectEq(1, e.Sys().(*syscall.Stat_t).Nlink)
	ExpectEq(currentUid(), e.Sys().(*syscall.Stat_t).Uid)
	ExpectEq(currentGid(), e.Sys().(*syscall.Stat_t).Gid)

	// foo
	e = entries[2]
	ExpectEq("foo", e.Name())
	ExpectEq(len("taco"), e.Size())
	ExpectEq(filePerms, e.Mode())
	ExpectThat(e, fusetesting.MtimeIsWithin(createTime, timeSlop))
	ExpectFalse(e.IsDir())
	ExpectEq(1, e.Sys().(*syscall.Stat_t).Nlink)
	ExpectEq(currentUid(), e.Sys().(*syscall.Stat_t).Uid)
	ExpectEq(currentGid(), e.Sys().(*syscall.Stat_t).Gid)
}

func (t *ImplicitDirsTest) ConflictingNames_OneIsSymlink() {
	var fi os.FileInfo
	var entries []os.FileInfo
	var err error

	// Set up contents.
	AssertEq(
		nil,
		t.createObjects(
			map[string]string{
				// Symlink
				"foo": "",

				// Directory
				"foo/": "",
			}))

	// Cause "foo" to look like a symlink.
	err = setSymlinkTarget(t.ctx, t.bucket, "foo", "")
	AssertEq(nil, err)

	// A listing of the parent should contain a directory named "foo" and a
	// symlink named "foo\n".
	entries, err = fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)
	AssertEq(2, len(entries))

	fi = entries[0]
	ExpectEq("foo", fi.Name())
	ExpectEq(0, fi.Size())
	ExpectEq(dirPerms|os.ModeDir, fi.Mode())
	ExpectTrue(fi.IsDir())
	ExpectEq(1, fi.Sys().(*syscall.Stat_t).Nlink)

	fi = entries[1]
	ExpectEq("foo\n", fi.Name())
	ExpectEq(0, fi.Size())
	ExpectEq(filePerms|os.ModeSymlink, fi.Mode())
	ExpectFalse(fi.IsDir())
	ExpectEq(1, fi.Sys().(*syscall.Stat_t).Nlink)

	// Statting "foo" should yield the directory.
	fi, err = os.Lstat(path.Join(t.mfs.Dir(), "foo"))
	AssertEq(nil, err)

	ExpectEq("foo", fi.Name())
	ExpectTrue(fi.IsDir())

	// Statting "foo\n" should yield the symlink.
	fi, err = os.Lstat(path.Join(t.mfs.Dir(), "foo\n"))
	AssertEq(nil, err)

	ExpectEq("foo\n", fi.Name())
	ExpectEq(filePerms|os.ModeSymlink, fi.Mode())
}

func (t *ImplicitDirsTest) ConflictingNames_PlaceholderNotPresent() {
	var fi os.FileInfo
	var entries []os.FileInfo
	var err error

	// Set up contents.
	AssertEq(
		nil,
		t.createObjects(
			map[string]string{
				// File
				"foo": "taco",

				// Implicit directory
				"foo/bar": "",
			}))

	// A listing of the parent should contain a directory named "foo" and a
	// file named "foo\n".
	entries, err = fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)
	AssertEq(2, len(entries))

	fi = entries[0]
	ExpectEq("foo", fi.Name())
	ExpectEq(0, fi.Size())
	ExpectEq(dirPerms|os.ModeDir, fi.Mode())
	ExpectTrue(fi.IsDir())

	fi = entries[1]
	ExpectEq("foo\n", fi.Name())
	ExpectEq(len("taco"), fi.Size())
	ExpectEq(len("taco"), fi.Size())
	ExpectEq(filePerms, fi.Mode())
	ExpectFalse(fi.IsDir())
	ExpectEq(1, fi.Sys().(*syscall.Stat_t).Nlink)

	// Statting "foo" should yield the directory.
	fi, err = os.Stat(path.Join(t.mfs.Dir(), "foo"))
	AssertEq(nil, err)

	ExpectEq("foo", fi.Name())
	ExpectTrue(fi.IsDir())

	// Statting "foo\n" should yield the file.
	fi, err = os.Stat(path.Join(t.mfs.Dir(), "foo\n"))
	AssertEq(nil, err)

	ExpectEq("foo\n", fi.Name())
	ExpectEq(len("taco"), fi.Size())
	ExpectFalse(fi.IsDir())
}

func (t *HelloFSTest) ReadDir_Dir() {
	entries, err := fusetesting.ReadDirPicky(path.Join(t.Dir, "dir"))

	AssertEq(nil, err)
	AssertEq(1, len(entries))
	var fi os.FileInfo

	// world
	fi = entries[0]
	ExpectEq("world", fi.Name())
	ExpectEq(len("Hello, world!"), fi.Size())
	ExpectEq(0444, fi.Mode())
	ExpectEq(0, t.Clock.Now().Sub(fi.ModTime()), "ModTime: %v", fi.ModTime())
	ExpectFalse(fi.IsDir())
}

func (t *ForeignModsTest) ReadFromFile_Large() {
	const contentLen = 1 << 20
	contents := randString(contentLen)

	// Create an object.
	AssertEq(nil, t.createWithContents("foo", contents))

	// Wait for it to show up in the file system.
	_, err := fusetesting.ReadDirPicky(t.mfs.Dir())
	AssertEq(nil, err)

	// Attempt to open it.
	f, err := os.Open(path.Join(t.mfs.Dir(), "foo"))
	AssertEq(nil, err)
	defer func() { AssertEq(nil, f.Close()) }()

	// Read its entire contents.
	slice, err := ioutil.ReadAll(f)
	AssertEq(nil, err)
	if contents != string(slice) {
		ExpectTrue(
			false,
			"Expected:\n%v\n\nActual:\n%v",
			hex.Dump([]byte(contents)),
			hex.Dump(slice))
	}

	// Read from parts of it.
	referenceReader := strings.NewReader(contents)
	for trial := 0; trial < 1000; trial++ {
		offset := rand.Int63n(contentLen + 1)
		size := rand.Intn(int(contentLen - offset))

		expected, err := readRange(referenceReader, offset, size)
		AssertEq(nil, err)

		actual, err := readRange(f, offset, size)
		AssertEq(nil, err)

		if expected != actual {
			AssertTrue(
				expected == actual,
				"Expected:\n%s\nActual:\n%s",
				hex.Dump([]byte(expected)),
				hex.Dump([]byte(actual)))
		}
	}
}