Add wrappers for the module module

impl/memory/module_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/module"
+        "golang.org/x/net/context"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestModule(t *testing.T) {
+        Convey("NumInstances", t, func() {
+                c := Use(context.Background())
+                m := module.Get(c)
+
+                i, err := m.NumInstances("foo", "bar")
+                So(i, ShouldEqual, 1)
+                So(err, ShouldBeNil)
+
+                So(m.SetNumInstances("foo", "bar", 42), ShouldBeNil)
+                i, err = m.NumInstances("foo", "bar")
+                So(i, ShouldEqual, 42)
+                So(err, ShouldBeNil)
+
+                i, err = m.NumInstances("foo", "baz")
+                So(i, ShouldEqual, 1)
+                So(err, ShouldBeNil)
+        })
+}