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/bind_unittest.cc

@@ -0,0 +1,67 @@
+/*
+ *  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/bind.h"
+#include "webrtc/base/gunit.h"
+
+namespace rtc {
+
+namespace {
+
+struct MethodBindTester {
+  void NullaryVoid() { ++call_count; }
+  int NullaryInt() { ++call_count; return 1; }
+  int NullaryConst() const { ++call_count; return 2; }
+  void UnaryVoid(int dummy) { ++call_count; }
+  template <class T> T Identity(T value) { ++call_count; return value; }
+  int UnaryByRef(int& value) const { ++call_count; return ++value; }  // NOLINT
+  int Multiply(int a, int b) const { ++call_count; return a * b; }
+  mutable int call_count;
+};
+
+int Return42() { return 42; }
+int Negate(int a) { return -a; }
+int Multiply(int a, int b) { return a * b; }
+
+}  // namespace
+
+TEST(BindTest, BindToMethod) {
+  MethodBindTester object = {0};
+  EXPECT_EQ(0, object.call_count);
+  Bind(&MethodBindTester::NullaryVoid, &object)();
+  EXPECT_EQ(1, object.call_count);
+  EXPECT_EQ(1, Bind(&MethodBindTester::NullaryInt, &object)());
+  EXPECT_EQ(2, object.call_count);
+  EXPECT_EQ(2, Bind(&MethodBindTester::NullaryConst,
+                    static_cast<const MethodBindTester*>(&object))());
+  EXPECT_EQ(3, object.call_count);
+  Bind(&MethodBindTester::UnaryVoid, &object, 5)();
+  EXPECT_EQ(4, object.call_count);
+  EXPECT_EQ(100, Bind(&MethodBindTester::Identity<int>, &object, 100)());
+  EXPECT_EQ(5, object.call_count);
+  const std::string string_value("test string");
+  EXPECT_EQ(string_value, Bind(&MethodBindTester::Identity<std::string>,
+                               &object, string_value)());
+  EXPECT_EQ(6, object.call_count);
+  int value = 11;
+  EXPECT_EQ(12, Bind(&MethodBindTester::UnaryByRef, &object, value)());
+  EXPECT_EQ(12, value);
+  EXPECT_EQ(7, object.call_count);
+  EXPECT_EQ(56, Bind(&MethodBindTester::Multiply, &object, 7, 8)());
+  EXPECT_EQ(8, object.call_count);
+}
+
+TEST(BindTest, BindToFunction) {
+  EXPECT_EQ(42, Bind(&Return42)());
+  EXPECT_EQ(3, Bind(&Negate, -3)());
+  EXPECT_EQ(56, Bind(&Multiply, 8, 7)());
+}
+
+}  // namespace rtc