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28 #include "talk/base/bind.h"
29 #include "talk/base/gunit.h"
35 struct MethodBindTester {
36 void NullaryVoid() { ++call_count; }
37 int NullaryInt() { ++call_count; return 1; }
38 int NullaryConst() const { ++call_count; return 2; }
39 void UnaryVoid(int dummy) { ++call_count; }
40 template <class T> T Identity(T value) { ++call_count; return value; }
41 int UnaryByRef(int& value) const { ++call_count; return ++value; } // NOLINT
42 int Multiply(int a, int b) const { ++call_count; return a * b; }
43 mutable int call_count;
46 int Return42() { return 42; }
47 int Negate(int a) { return -a; }
48 int Multiply(int a, int b) { return a * b; }
52 TEST(BindTest, BindToMethod) {
53 MethodBindTester object = {0};
54 EXPECT_EQ(0, object.call_count);
55 Bind(&MethodBindTester::NullaryVoid, &object)();
56 EXPECT_EQ(1, object.call_count);
57 EXPECT_EQ(1, Bind(&MethodBindTester::NullaryInt, &object)());
58 EXPECT_EQ(2, object.call_count);
59 EXPECT_EQ(2, Bind(&MethodBindTester::NullaryConst,
60 static_cast<const MethodBindTester*>(&object))());
61 EXPECT_EQ(3, object.call_count);
62 Bind(&MethodBindTester::UnaryVoid, &object, 5)();
63 EXPECT_EQ(4, object.call_count);
64 EXPECT_EQ(100, Bind(&MethodBindTester::Identity<int>, &object, 100)());
65 EXPECT_EQ(5, object.call_count);
66 const std::string string_value("test string");
67 EXPECT_EQ(string_value, Bind(&MethodBindTester::Identity<std::string>,
68 &object, string_value)());
69 EXPECT_EQ(6, object.call_count);
71 EXPECT_EQ(12, Bind(&MethodBindTester::UnaryByRef, &object, value)());
73 EXPECT_EQ(7, object.call_count);
74 EXPECT_EQ(56, Bind(&MethodBindTester::Multiply, &object, 7, 8)());
75 EXPECT_EQ(8, object.call_count);
78 TEST(BindTest, BindToFunction) {
79 EXPECT_EQ(42, Bind(&Return42)());
80 EXPECT_EQ(3, Bind(&Negate, -3)());
81 EXPECT_EQ(56, Bind(&Multiply, 8, 7)());
84 } // namespace talk_base