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go/src/infra/libs/git/objectID_test.go

Index: go/src/infra/libs/git/objectID_test.go
diff --git a/go/src/infra/libs/git/objectID_test.go b/go/src/infra/libs/git/objectID_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..a5d07a6e32ff05e91c947ece78eb549994502e36
--- /dev/null
+++ b/go/src/infra/libs/git/objectID_test.go
@@ -0,0 +1,43 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package git
+
+import (
+	"encoding/hex"
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestMakeObjectID(t *testing.T) {
+	t.Parallel()
+
+	Convey("ObjectID", t, func() {
+		Convey("NoID", func() {
+			So(NoID, ShouldResemble, ObjectID{})
+			So(NoID.String(), ShouldEqual, "<NoID>")
+		})
+
+		Convey("MakeObjectID", func() {
+			db := "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef"
+			hdb, err := hex.DecodeString(db)
+			So(err, ShouldBeNil)
+
+			id := MakeObjectID(db)
+			So(id.String(), ShouldEqual, db)
+			So(id.RawString(), ShouldEqual, string(hdb))
+
+			Convey("Panics when given garbage", func() {
+				So(func() { MakeObjectID("cats") }, ShouldPanic)
+				So(func() { MakeObjectID("deadcatsdeadcatsdeadcatsdeadcatsdeadcats") }, ShouldPanic)
+			})
+		})
+
+		Convey("MakeObjectIDRawErr lets you intercept the error", func() {
+			_, err := MakeObjectIDRawErr([]byte("cats"))
+			So(err, ShouldNotBeNil)
+		})
+	})
+}