1 files changed, 69 insertions, 0 deletions
diff --git a/plumbing/format/idxfile/decoder_test.go b/plumbing/format/idxfile/decoder_test.go
new file mode 100644
index 0000000..5231e64
--- /dev/null
+++ b/plumbing/format/idxfile/decoder_test.go
@@ -0,0 +1,69 @@
+package idxfile
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	. "gopkg.in/check.v1"
+	"gopkg.in/src-d/go-git.v4/fixtures"
+	"gopkg.in/src-d/go-git.v4/plumbing/format/packfile"
+	"gopkg.in/src-d/go-git.v4/storage/memory"
+)
+
+func Test(t *testing.T) { TestingT(t) }
+
+type IdxfileSuite struct {
+	fixtures.Suite
+}
+
+var _ = Suite(&IdxfileSuite{})
+
+func (s *IdxfileSuite) TestDecode(c *C) {
+	f := fixtures.Basic().One()
+
+	d := NewDecoder(f.Idx())
+	idx := &Idxfile{}
+	err := d.Decode(idx)
+	c.Assert(err, IsNil)
+
+	c.Assert(idx.Entries, HasLen, 31)
+	c.Assert(idx.Entries[0].Hash.String(), Equals, "1669dce138d9b841a518c64b10914d88f5e488ea")
+	c.Assert(idx.Entries[0].Offset, Equals, uint64(615))
+	c.Assert(idx.Entries[0].CRC32, Equals, uint32(3645019190))
+
+	c.Assert(fmt.Sprintf("%x", idx.IdxChecksum), Equals, "fb794f1ec720b9bc8e43257451bd99c4be6fa1c9")
+	c.Assert(fmt.Sprintf("%x", idx.PackfileChecksum), Equals, f.PackfileHash.String())
+}
+
+func (s *IdxfileSuite) TestDecodeCRCs(c *C) {
+	f := fixtures.Basic().ByTag("ofs-delta").One()
+
+	scanner := packfile.NewScanner(f.Packfile())
+	storage := memory.NewStorage()
+
+	pd, err := packfile.NewDecoder(scanner, storage)
+	c.Assert(err, IsNil)
+	_, err = pd.Decode()
+	c.Assert(err, IsNil)
+
+	i := &Idxfile{Version: VersionSupported}
+
+	offsets := pd.Offsets()
+	for h, crc := range pd.CRCs() {
+		i.Add(h, uint64(offsets[h]), crc)
+	}
+
+	buf := bytes.NewBuffer(nil)
+	e := NewEncoder(buf)
+	_, err = e.Encode(i)
+	c.Assert(err, IsNil)
+
+	idx := &Idxfile{}
+
+	d := NewDecoder(buf)
+	err = d.Decode(idx)
+	c.Assert(err, IsNil)
+
+	c.Assert(idx.Entries, DeepEquals, i.Entries)
+}