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followlinks_test.go
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followlinks_test.go
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package fsutil
import (
"testing"
"github.com/containerd/continuity/fs/fstest"
"github.com/stretchr/testify/require"
)
func TestFollowLinks(t *testing.T) {
tmpDir := t.TempDir()
apply := fstest.Apply(
fstest.CreateDir("dir", 0700),
fstest.CreateFile("dir/foo", []byte("contents"), 0600),
fstest.Symlink("foo", "dir/l1"),
fstest.Symlink("dir/l1", "l2"),
fstest.CreateFile("bar", nil, 0600),
fstest.CreateFile("baz", nil, 0600),
)
require.NoError(t, apply.Apply(tmpDir))
out, err := FollowLinks(tmpDir, []string{"l2", "bar"})
require.NoError(t, err)
require.Equal(t, out, []string{"bar", "dir/foo", "dir/l1", "l2"})
}
func TestFollowLinksLoop(t *testing.T) {
tmpDir := t.TempDir()
apply := fstest.Apply(
fstest.Symlink("l1", "l1"),
fstest.Symlink("l2", "l3"),
fstest.Symlink("l3", "l2"),
)
require.NoError(t, apply.Apply(tmpDir))
out, err := FollowLinks(tmpDir, []string{"l1", "l3"})
require.NoError(t, err)
require.Equal(t, out, []string{"l1", "l2", "l3"})
}
func TestFollowLinksAbsolute(t *testing.T) {
tmpDir := t.TempDir()
apply := fstest.Apply(
fstest.CreateDir("dir", 0700),
fstest.Symlink("/foo/bar/baz", "dir/l1"),
fstest.CreateDir("foo", 0700),
fstest.Symlink("../", "foo/bar"),
fstest.CreateFile("baz", nil, 0600),
)
require.NoError(t, apply.Apply(tmpDir))
out, err := FollowLinks(tmpDir, []string{"dir/l1"})
require.NoError(t, err)
require.Equal(t, out, []string{"baz", "dir/l1", "foo/bar"})
// same but a link outside root
tmpDir = t.TempDir()
apply = fstest.Apply(
fstest.CreateDir("dir", 0700),
fstest.Symlink("/foo/bar/baz", "dir/l1"),
fstest.CreateDir("foo", 0700),
fstest.Symlink("../../../", "foo/bar"),
fstest.CreateFile("baz", nil, 0600),
)
require.NoError(t, apply.Apply(tmpDir))
out, err = FollowLinks(tmpDir, []string{"dir/l1"})
require.NoError(t, err)
require.Equal(t, out, []string{"baz", "dir/l1", "foo/bar"})
}
func TestFollowLinksNotExists(t *testing.T) {
tmpDir := t.TempDir()
out, err := FollowLinks(tmpDir, []string{"foo/bar/baz", "bar/baz"})
require.NoError(t, err)
require.Equal(t, out, []string{"bar/baz", "foo/bar/baz"})
// root works fine with empty directory
out, err = FollowLinks(tmpDir, []string{"."})
require.NoError(t, err)
require.Equal(t, out, []string(nil))
out, err = FollowLinks(tmpDir, []string{"f*/foo/t*"})
require.NoError(t, err)
require.Equal(t, out, []string{"f*/foo/t*"})
}
func TestFollowLinksNormalized(t *testing.T) {
tmpDir := t.TempDir()
out, err := FollowLinks(tmpDir, []string{"foo/bar/baz", "foo/bar"})
require.NoError(t, err)
require.Equal(t, out, []string{"foo/bar"})
apply := fstest.Apply(
fstest.CreateDir("dir", 0700),
fstest.Symlink("/foo", "dir/l1"),
fstest.Symlink("/", "dir/l2"),
fstest.CreateDir("foo", 0700),
fstest.CreateFile("foo/bar", nil, 0600),
)
require.NoError(t, apply.Apply(tmpDir))
out, err = FollowLinks(tmpDir, []string{"dir/l1", "foo/bar"})
require.NoError(t, err)
require.Equal(t, out, []string{"dir/l1", "foo"})
out, err = FollowLinks(tmpDir, []string{"dir/l2", "foo", "foo/bar"})
require.NoError(t, err)
require.Equal(t, out, []string(nil))
}
func TestFollowLinksWildcard(t *testing.T) {
tmpDir := t.TempDir()
apply := fstest.Apply(
fstest.CreateDir("dir", 0700),
fstest.CreateDir("foo", 0700),
fstest.Symlink("/foo/bar1", "dir/l1"),
fstest.Symlink("/foo/bar2", "dir/l2"),
fstest.Symlink("/foo/bar3", "dir/anotherlink"),
fstest.Symlink("../baz", "foo/bar2"),
fstest.CreateFile("foo/bar1", nil, 0600),
fstest.CreateFile("foo/bar3", nil, 0600),
fstest.CreateFile("baz", nil, 0600),
)
require.NoError(t, apply.Apply(tmpDir))
out, err := FollowLinks(tmpDir, []string{"dir/l*"})
require.NoError(t, err)
require.Equal(t, out, []string{"baz", "dir/l*", "foo/bar1", "foo/bar2"})
out, err = FollowLinks(tmpDir, []string{"dir"})
require.NoError(t, err)
require.Equal(t, out, []string{"dir"})
out, err = FollowLinks(tmpDir, []string{"dir", "dir/*link"})
require.NoError(t, err)
require.Equal(t, out, []string{"dir", "foo/bar3"})
}