Checkin a version of gmock, modified to use our boost_tuple in VS2005.

This checkin adds gmock, and a small example of how to write a gmock-based unittest.

Review URL: http://codereview.chromium.org/113807

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16927 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 137 insertions, 0 deletions

diff --git a/base/gmock_unittest.cc b/base/gmock_unittest.cc
new file mode 100644
index 0000000..855380a
--- /dev/null
+++ b/base/gmock_unittest.cc
@@ -0,0 +1,137 @@
+// Copyright (c) 2009 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.
+//
+// This test is a simple sanity check to make sure gmock is able to build/link
+// correctly.  It just instantiates a mock object and runs through a couple of
+// the basic mock features.
+
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+// Gmock matchers and actions that we use below.
+using testing::AnyOf;
+using testing::Eq;
+using testing::Return;
+using testing::SetArgumentPointee;
+using testing::WithArg;
+using testing::_;
+
+namespace {
+
+// Simple class that we can mock out the behavior for.  Everything is virtual
+// for easy mocking.
+class SampleClass {
+ public:
+  SampleClass() {}
+  virtual ~SampleClass() {}
+
+  virtual int ReturnSomething() {
+    return -1;
+  }
+
+  virtual void ReturnNothingConstly() const {
+  }
+
+  virtual void OutputParam(int* a) {
+  }
+
+  virtual int ReturnSecond(int a, int b) {
+    return b;
+  }
+};
+
+// Declare a mock for the class.
+class MockSampleClass : public SampleClass {
+ public:
+  MOCK_METHOD0(ReturnSomething, int());
+  MOCK_CONST_METHOD0(ReturnNothingConstly, void());
+  MOCK_METHOD1(OutputParam, void(int* a));
+  MOCK_METHOD2(ReturnSecond, int(int a, int b));
+};
+
+// Create a couple of custom actions.  Custom actions can be used for adding
+// more complex behavior into your mock...though if you start needing these, ask
+// if you're asking your mock to do too much.
+ACTION(ReturnVal) {
+  // Return the first argument received.
+  return arg0;
+}
+ACTION(ReturnSecond) {
+  // Returns the second argument.  This basically implemetns ReturnSecond.
+  return arg1;
+}
+
+TEST(GmockTest, SimpleMatchAndActions) {
+  // Basic test of some simple gmock matchers, actions, and cardinality
+  // expectations.
+  MockSampleClass mock;
+
+  EXPECT_CALL(mock, ReturnSomething())
+      .WillOnce(Return(1))
+      .WillOnce(Return(2))
+      .WillOnce(Return(3));
+  EXPECT_EQ(1, mock.ReturnSomething());
+  EXPECT_EQ(2, mock.ReturnSomething());
+  EXPECT_EQ(3, mock.ReturnSomething());
+
+  EXPECT_CALL(mock, ReturnNothingConstly()).Times(2);
+  mock.ReturnNothingConstly();
+  mock.ReturnNothingConstly();
+}
+
+TEST(GmockTest, AssignArgument) {
+  // Capture an argument for examination.
+  MockSampleClass mock;
+
+  EXPECT_CALL(mock, OutputParam(_))
+      .WillRepeatedly(SetArgumentPointee<0>(5));
+
+  int arg = 0;
+  mock.OutputParam(&arg);
+  EXPECT_EQ(5, arg);
+}
+
+TEST(GmockTest, SideEffects) {
+  // Capture an argument for examination.
+  MockSampleClass mock;
+
+  EXPECT_CALL(mock, OutputParam(_))
+      .WillRepeatedly(SetArgumentPointee<0>(5));
+
+  int arg = 0;
+  mock.OutputParam(&arg);
+  EXPECT_EQ(5, arg);
+}
+
+TEST(GmockTest, CustomAction_ReturnSecond) {
+  // Test a mock of the ReturnSecond behavior using an action that provides an
+  // alternate implementation of the function.  Danger here though, this is
+  // starting to add too much behavior of the mock, which means the mock
+  // implementation might start to have bugs itself.
+  MockSampleClass mock;
+
+  EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5))))
+      .WillRepeatedly(ReturnSecond());
+  EXPECT_EQ(4, mock.ReturnSecond(-1, 4));
+  EXPECT_EQ(5, mock.ReturnSecond(0, 5));
+  EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4));
+  EXPECT_EQ(4, mock.ReturnSecond(112358, 4));
+  EXPECT_EQ(5, mock.ReturnSecond(1337, 5));
+}
+
+TEST(GmockTest, CustomAction_ReturnVal) {
+  // Alternate implemention of ReturnSecond using a more general custom action,
+  // and a WithArg adapter to bridge the interfaces.
+  MockSampleClass mock;
+
+  EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5))))
+      .WillRepeatedly(WithArg<1>(ReturnVal()));
+  EXPECT_EQ(4, mock.ReturnSecond(-1, 4));
+  EXPECT_EQ(5, mock.ReturnSecond(0, 5));
+  EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4));
+  EXPECT_EQ(4, mock.ReturnSecond(112358, 4));
+  EXPECT_EQ(5, mock.ReturnSecond(1337, 5));
+}
+
+}  // namespace