1 files changed, 78 insertions, 0 deletions
diff --git a/plumbing/format/index/encoder_test.go b/plumbing/format/index/encoder_test.go
new file mode 100644
index 0000000..6770985
--- /dev/null
+++ b/plumbing/format/index/encoder_test.go
@@ -0,0 +1,78 @@
+package index
+
+import (
+	"bytes"
+	"strings"
+	"time"
+
+	. "gopkg.in/check.v1"
+	"gopkg.in/src-d/go-git.v4/plumbing"
+)
+
+func (s *IdxfileSuite) TestEncode(c *C) {
+	idx := &Index{
+		Version: 2,
+		Entries: []Entry{{
+			CreatedAt:  time.Now(),
+			ModifiedAt: time.Now(),
+			Dev:        4242,
+			Inode:      424242,
+			UID:        84,
+			GID:        8484,
+			Size:       42,
+			Stage:      TheirMode,
+			Hash:       plumbing.NewHash("e25b29c8946e0e192fae2edc1dabf7be71e8ecf3"),
+			Name:       "foo",
+		}, {
+			CreatedAt:  time.Now(),
+			ModifiedAt: time.Now(),
+			Name:       strings.Repeat(" ", 20),
+			Size:       82,
+		}},
+	}
+
+	buf := bytes.NewBuffer(nil)
+	e := NewEncoder(buf)
+	err := e.Encode(idx)
+	c.Assert(err, IsNil)
+
+	output := &Index{}
+	d := NewDecoder(buf)
+	err = d.Decode(output)
+	c.Assert(err, IsNil)
+
+	c.Assert(idx, DeepEquals, output)
+}
+
+func (s *IdxfileSuite) TestEncodeUnsuportedVersion(c *C) {
+	idx := &Index{Version: 3}
+
+	buf := bytes.NewBuffer(nil)
+	e := NewEncoder(buf)
+	err := e.Encode(idx)
+	c.Assert(err, Equals, ErrUnsupportedVersion)
+}
+
+func (s *IdxfileSuite) TestEncodeWithIntentToAddUnsuportedVersion(c *C) {
+	idx := &Index{
+		Version: 2,
+		Entries: []Entry{{IntentToAdd: true}},
+	}
+
+	buf := bytes.NewBuffer(nil)
+	e := NewEncoder(buf)
+	err := e.Encode(idx)
+	c.Assert(err, Equals, ErrUnsupportedVersion)
+}
+
+func (s *IdxfileSuite) TestEncodeWithSkipWorktreeUnsuportedVersion(c *C) {
+	idx := &Index{
+		Version: 2,
+		Entries: []Entry{{SkipWorktree: true}},
+	}
+
+	buf := bytes.NewBuffer(nil)
+	e := NewEncoder(buf)
+	err := e.Encode(idx)
+	c.Assert(err, Equals, ErrUnsupportedVersion)
+}