Add a MustNamespace that panics if the namespace wasn't valid

impl/memory/info_test.go

+// Copyright 2015 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 memory
+
+import (
+        "testing"
+
+        "github.com/luci/gae/service/info"
+        "golang.org/x/net/context"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestMustNamespace(t *testing.T) {
+        Convey("MustNamespace panics", t, func() {
+                c := Use(context.Background())
+                i := info.Get(c)
+
+                So(func() {
+                        i.MustNamespace("valid_namespace_name")
+                }, ShouldNotPanic)
+                So(func() {
+                        i.MustNamespace("invalid namespace name")
+                }, ShouldPanic)
+        })
+}