1 /* 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/base/bind.h" 12 #include "webrtc/base/callback.h" 13 #include "webrtc/base/gunit.h" 14 15 namespace rtc { 16 17 namespace { 18 19 void f() {} 20 int g() { return 42; } 21 int h(int x) { return x * x; } 22 void i(int& x) { x *= x; } // NOLINT: Testing refs 23 24 struct BindTester { 25 int a() { return 24; } 26 int b(int x) const { return x * x; } 27 }; 28 29 } // namespace 30 31 TEST(CallbackTest, VoidReturn) { 32 Callback0<void> cb; 33 EXPECT_TRUE(cb.empty()); 34 cb(); // Executing an empty callback should not crash. 35 cb = Callback0<void>(&f); 36 EXPECT_FALSE(cb.empty()); 37 cb(); 38 } 39 40 TEST(CallbackTest, IntReturn) { 41 Callback0<int> cb; 42 EXPECT_TRUE(cb.empty()); 43 cb = Callback0<int>(&g); 44 EXPECT_FALSE(cb.empty()); 45 EXPECT_EQ(42, cb()); 46 EXPECT_EQ(42, cb()); 47 } 48 49 TEST(CallbackTest, OneParam) { 50 Callback1<int, int> cb1(&h); 51 EXPECT_FALSE(cb1.empty()); 52 EXPECT_EQ(9, cb1(-3)); 53 EXPECT_EQ(100, cb1(10)); 54 55 // Try clearing a callback. 56 cb1 = Callback1<int, int>(); 57 EXPECT_TRUE(cb1.empty()); 58 59 // Try a callback with a ref parameter. 60 Callback1<void, int&> cb2(&i); 61 int x = 3; 62 cb2(x); 63 EXPECT_EQ(9, x); 64 cb2(x); 65 EXPECT_EQ(81, x); 66 } 67 68 TEST(CallbackTest, WithBind) { 69 BindTester t; 70 Callback0<int> cb1 = Bind(&BindTester::a, &t); 71 EXPECT_EQ(24, cb1()); 72 EXPECT_EQ(24, cb1()); 73 cb1 = Bind(&BindTester::b, &t, 10); 74 EXPECT_EQ(100, cb1()); 75 EXPECT_EQ(100, cb1()); 76 cb1 = Bind(&BindTester::b, &t, 5); 77 EXPECT_EQ(25, cb1()); 78 EXPECT_EQ(25, cb1()); 79 } 80 81 } // namespace rtc 82
