Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/referencecountedsingletonfactory_unittest.cc

@@ -0,0 +1,132 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/gunit.h"
+#include "webrtc/base/referencecountedsingletonfactory.h"
+
+namespace rtc {
+
+class MyExistenceWatcher {
+ public:
+  MyExistenceWatcher() { create_called_ = true; }
+  ~MyExistenceWatcher() { delete_called_ = true; }
+
+  static bool create_called_;
+  static bool delete_called_;
+};
+
+bool MyExistenceWatcher::create_called_ = false;
+bool MyExistenceWatcher::delete_called_ = false;
+
+class TestReferenceCountedSingletonFactory :
+    public ReferenceCountedSingletonFactory<MyExistenceWatcher> {
+ protected:
+  virtual bool SetupInstance() {
+    instance_.reset(new MyExistenceWatcher());
+    return true;
+  }
+
+  virtual void CleanupInstance() {
+    instance_.reset();
+  }
+};
+
+static void DoCreateAndGoOutOfScope(
+    ReferenceCountedSingletonFactory<MyExistenceWatcher> *factory) {
+  rcsf_ptr<MyExistenceWatcher> ptr(factory);
+  ptr.get();
+  // and now ptr should go out of scope.
+}
+
+TEST(ReferenceCountedSingletonFactory, ZeroReferenceCountCausesDeletion) {
+  TestReferenceCountedSingletonFactory factory;
+  MyExistenceWatcher::delete_called_ = false;
+  DoCreateAndGoOutOfScope(&factory);
+  EXPECT_TRUE(MyExistenceWatcher::delete_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, NonZeroReferenceCountDoesNotDelete) {
+  TestReferenceCountedSingletonFactory factory;
+  rcsf_ptr<MyExistenceWatcher> ptr(&factory);
+  ptr.get();
+  MyExistenceWatcher::delete_called_ = false;
+  DoCreateAndGoOutOfScope(&factory);
+  EXPECT_FALSE(MyExistenceWatcher::delete_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, ReturnedPointersReferToSameThing) {
+  TestReferenceCountedSingletonFactory factory;
+  rcsf_ptr<MyExistenceWatcher> one(&factory), two(&factory);
+
+  EXPECT_EQ(one.get(), two.get());
+}
+
+TEST(ReferenceCountedSingletonFactory, Release) {
+  TestReferenceCountedSingletonFactory factory;
+
+  rcsf_ptr<MyExistenceWatcher> one(&factory);
+  one.get();
+
+  MyExistenceWatcher::delete_called_ = false;
+  one.release();
+  EXPECT_TRUE(MyExistenceWatcher::delete_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, GetWithoutRelease) {
+  TestReferenceCountedSingletonFactory factory;
+  rcsf_ptr<MyExistenceWatcher> one(&factory);
+  one.get();
+
+  MyExistenceWatcher::create_called_ = false;
+  one.get();
+  EXPECT_FALSE(MyExistenceWatcher::create_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, GetAfterRelease) {
+  TestReferenceCountedSingletonFactory factory;
+  rcsf_ptr<MyExistenceWatcher> one(&factory);
+
+  MyExistenceWatcher::create_called_ = false;
+  one.release();
+  one.get();
+  EXPECT_TRUE(MyExistenceWatcher::create_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, MultipleReleases) {
+  TestReferenceCountedSingletonFactory factory;
+  rcsf_ptr<MyExistenceWatcher> one(&factory), two(&factory);
+
+  MyExistenceWatcher::create_called_ = false;
+  MyExistenceWatcher::delete_called_ = false;
+  one.release();
+  EXPECT_FALSE(MyExistenceWatcher::delete_called_);
+  one.release();
+  EXPECT_FALSE(MyExistenceWatcher::delete_called_);
+  one.release();
+  EXPECT_FALSE(MyExistenceWatcher::delete_called_);
+  one.get();
+  EXPECT_TRUE(MyExistenceWatcher::create_called_);
+}
+
+TEST(ReferenceCountedSingletonFactory, Existentialism) {
+  TestReferenceCountedSingletonFactory factory;
+
+  rcsf_ptr<MyExistenceWatcher> one(&factory);
+
+  MyExistenceWatcher::create_called_ = false;
+  MyExistenceWatcher::delete_called_ = false;
+
+  one.get();
+  EXPECT_TRUE(MyExistenceWatcher::create_called_);
+  one.release();
+  EXPECT_TRUE(MyExistenceWatcher::delete_called_);
+}
+
+}  // namespace rtc