utils: merkletrie support for symlinks

1 files changed, 19 insertions, 0 deletions

diff --git a/utils/merkletrie/filesystem/node_test.go b/utils/merkletrie/filesystem/node_test.go
index a383716..bf1178a 100644
--- a/utils/merkletrie/filesystem/node_test.go
+++ b/utils/merkletrie/filesystem/node_test.go
@@ -25,11 +25,13 @@ func (s *NoderSuite) TestDiff(c *C) {
 	WriteFile(fsA, "foo", []byte("foo"), 0644)
 	WriteFile(fsA, "qux/bar", []byte("foo"), 0644)
 	WriteFile(fsA, "qux/qux", []byte("foo"), 0644)
+	fsA.Symlink("foo", "bar")
 
 	fsB := memfs.New()
 	WriteFile(fsB, "foo", []byte("foo"), 0644)
 	WriteFile(fsB, "qux/bar", []byte("foo"), 0644)
 	WriteFile(fsB, "qux/qux", []byte("foo"), 0644)
+	fsB.Symlink("foo", "bar")
 
 	ch, err := merkletrie.DiffTree(
 		NewRootNode(fsA, nil),
@@ -41,6 +43,23 @@ func (s *NoderSuite) TestDiff(c *C) {
 	c.Assert(ch, HasLen, 0)
 }
 
+func (s *NoderSuite) TestDiffChangeLink(c *C) {
+	fsA := memfs.New()
+	fsA.Symlink("qux", "foo")
+
+	fsB := memfs.New()
+	fsB.Symlink("bar", "foo")
+
+	ch, err := merkletrie.DiffTree(
+		NewRootNode(fsA, nil),
+		NewRootNode(fsB, nil),
+		IsEquals,
+	)
+
+	c.Assert(err, IsNil)
+	c.Assert(ch, HasLen, 1)
+}
+
 func (s *NoderSuite) TestDiffChangeContent(c *C) {
 	fsA := memfs.New()
 	WriteFile(fsA, "foo", []byte("foo"), 0644)