Simple memory testing for gae/wrapper

go/src/infra/gae/libs/meta/eg_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 meta
+
+import (
+        "golang.org/x/net/context"
+        "testing"
+
+        "infra/gae/libs/wrapper"
+        "infra/gae/libs/wrapper/memory"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestGetEntityGroupVersion(t *testing.T) {
+        Convey("GetEntityGroupVersion", t, func() {
+                c := memory.Use(memory.Enable(context.Background()))
+                ds := wrapper.DS(c)
+
+                type A struct {
+                        ID  int64 `datastore:"-" goon:"id"`
+                        Val int
+                }
+
+                a := &A{Val: 10}
+                aKey, err := ds.Put(a)
+                So(err, ShouldBeNil)
+
+                v, err := GetEntityGroupVersion(c, aKey)
+                So(err, ShouldBeNil)
+                So(v, ShouldEqual, 1)
+
+                So(ds.Delete(aKey), ShouldBeNil)
+
+                v, err = GetEntityGroupVersion(c, ds.NewKey("madeUp", "thing", 0, aKey))
+                So(err, ShouldBeNil)
+                So(v, ShouldEqual, 2)
+
+                v, err = GetEntityGroupVersion(c, ds.NewKey("madeUp", "thing", 0, nil))
+                So(err, ShouldBeNil)
+                So(v, ShouldEqual, 0)
+
+                tDs := ds.(wrapper.Testable)
+                tDs.SetBrokenFeatures("Get")
+
+                v, err = GetEntityGroupVersion(c, aKey)
+                So(err.Error(), ShouldContainSubstring, "INTERNAL_ERROR")
+        })
+}