Add a test for references

reference_test.go

@@ -0,0 +1,74 @@
+package git
+
+import (
+	"os"
+	"runtime"
+	"testing"
+	"time"
+)
+
+func TestRefModification(t *testing.T) {
+	repo := createTestRepo(t)
+	defer os.RemoveAll(repo.Path())
+
+	loc, err := time.LoadLocation("Europe/Berlin")
+	checkFatal(t, err)
+	sig := &Signature{
+		Name:  "Rand Om Hacker",
+		Email: "random@hacker.com",
+		When:  time.Date(2013, 03, 06, 14, 30, 0, 0, loc),
+	}
+
+	idx, err := repo.Index()
+	checkFatal(t, err)
+	err = idx.AddByPath("README")
+	checkFatal(t, err)
+	treeId, err := idx.WriteTree()
+	checkFatal(t, err)
+
+	message := "This is a commit\n"
+	tree, err := repo.LookupTree(treeId)
+	checkFatal(t, err)
+	commitId, err := repo.CreateCommit("HEAD", sig, sig, message, tree)
+	checkFatal(t, err)
+
+	_, err = repo.CreateReference("refs/tags/tree", treeId, true)
+	checkFatal(t, err)
+
+	tag, err := repo.LookupReference("refs/tags/tree")
+	checkFatal(t, err)
+	checkRefType(t, tag, OID)
+
+	ref, err := repo.LookupReference("HEAD")
+	checkFatal(t, err)
+	checkRefType(t, ref, SYMBOLIC)
+
+	ref, err = ref.Resolve()
+	checkFatal(t, err)
+	checkRefType(t, ref, OID)
+
+	if commitId.String() != ref.Target().String() {
+		t.Fatalf("Wrong ref target")
+	}
+
+	_, err = tag.Rename("refs/tags/renamed", false)
+	checkFatal(t, err)
+	tag, err = repo.LookupReference("refs/tags/renamed")
+	checkFatal(t, err)
+	checkRefType(t, ref, OID)
+
+}
+
+func checkRefType(t *testing.T, ref *Reference, kind int) {
+	if ref.Type() == kind {
+		return
+	}
+
+	// The failure happens at wherever we were called, not here
+	_, file, line, ok := runtime.Caller(1)
+	if !ok {
+		t.Fatal()
+	}
+
+	t.Fatalf("Wrong ref type at %v:%v; have %v, expected %v", file, line, ref.Type(), kind)
+}