| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include <stdlib.h> |
| #include "base/singleton.h" |
| #include "base/thread.h" |
| #include "base/util.h" |
| #include "testing/base/public/gunit.h" |
| |
| namespace mozc { |
| namespace { |
| |
| static int g_counter = 0; |
| |
| class TestInstance { |
| public: |
| TestInstance() { |
| ++g_counter; |
| } |
| }; |
| |
| class ThreadInstance { |
| public: |
| ThreadInstance() { |
| // Wait two secs to test the singleton |
| // can safely block the initialization procedure. |
| Util::Sleep(2000); // wait 2sec |
| ++g_counter; |
| } |
| }; |
| |
| class ThreadTest : public Thread { |
| public: |
| void Run() { |
| instance_ = Singleton<ThreadInstance>::get(); |
| } |
| |
| ThreadInstance *get() { |
| return instance_; |
| } |
| |
| ThreadTest() : instance_(NULL) {} |
| |
| private: |
| ThreadInstance *instance_; |
| }; |
| } // namespace |
| |
| // Cannot have a testcase for Singleton::SingletonFinalizer, |
| // since it affects other tests using Singleton objects. |
| TEST(SingletonTest, BasicTest) { |
| g_counter = 0; |
| TestInstance *t1 = Singleton<TestInstance>::get(); |
| TestInstance *t2 = Singleton<TestInstance>::get(); |
| TestInstance *t3 = Singleton<TestInstance>::get(); |
| EXPECT_EQ(t1, t2); |
| EXPECT_EQ(t2, t3); |
| EXPECT_EQ(1, g_counter); |
| } |
| |
| TEST(SingletonTest, ThreadTest) { |
| // call Singelton::get() at the same time from |
| // different threds. Make sure that get() returns |
| // the same instance |
| |
| g_counter = 0; |
| |
| ThreadTest test1; |
| ThreadTest test2; |
| ThreadTest test3; |
| |
| // Create the ThreadInstance simultaneously. |
| test1.Start(); |
| test2.Start(); |
| test3.Start(); |
| |
| test1.Join(); |
| test2.Join(); |
| test3.Join(); |
| |
| EXPECT_EQ(1, g_counter); |
| |
| // three instances must be the same. |
| EXPECT_EQ(test1.get(), test2.get()); |
| EXPECT_EQ(test2.get(), test3.get()); |
| } |
| } // namespace mozc |