在哪个网站上可以学做衣服,wordpress菜单函数,石家庄最好的网站建设公司排名,班级网站 模板引言
前文我们已经讲解了gmock的基本语法#xff0c;但是gmock只能mock虚函数#xff0c;如果要mock非虚成员函数、静态成员函数、全局函数、重载函数、模板函数以及其他依赖库的函数时#xff0c;gmock就很难实现。而cppmockfree可以支持这些函数的mock。
快速入门
1. m…引言
前文我们已经讲解了gmock的基本语法但是gmock只能mock虚函数如果要mock非虚成员函数、静态成员函数、全局函数、重载函数、模板函数以及其他依赖库的函数时gmock就很难实现。而cppmockfree可以支持这些函数的mock。
快速入门
1. mock样例
1.1 全局函数
// gloabal function
int g_func(int a, int b)
{return a b;
}#include gtest/gtest.h
#include gmock/gmock.h
#include cpp_free_mock.h
#include stringusing namespace ::testing;
using namespace ::CppFreeMock;namespace {
TEST(TestCppMockFree, CaseGlobalFunction)
{auto mock MOCKER(g_func);EXPECT_CALL(*mock, MOCK_FUNCTION(_, _)).WillOnce(Return(1)).WillRepeatedly(Return(2));EXPECT_EQ(1, g_func(1, 2));EXPECT_EQ(2, g_func(12, 2));mock-RestoreToReal();EXPECT_EQ(14, g_func(12, 2));
}1.2 成员函数
class Adder {
public:int add(int a, int b) const{return a b;}
};TEST(TestCppMockFree, CaseStaticMemberFunction)
{auto mock MOCKER(Adder::add);// 针对类的成员函数要注意占位符会多出一个即第一个为this指针// 而全局函数或者静态成员函数占位符个数等于实际参数个数EXPECT_CALL(*mock, MOCK_FUNCTION(_, _, _)).WillRepeatedly(Return(2));Adder adder;EXPECT_EQ(2, adder.add(1, 2));EXPECT_EQ(2, adder.add(12, 2));mock-RestoreToReal();EXPECT_EQ(14, g_func(12, 2));
}1.3 静态成员函数
// static member function
class Printer {
public:static std::string print(const std::string str){return str;}
};TEST(TestCppMockFree, CaseStaticMemberFunction)
{auto mock MOCKER(Printer::print);EXPECT_CALL(*mock, MOCK_FUNCTION(_)).WillRepeatedly(Return(std::string(mocker)));EXPECT_STREQ(mocker, Printer::print(hello).c_str());mock-RestoreToReal();EXPECT_STREQ(hello, Printer::print(hello).c_str());
}1.4 函数重载
// overload function
class OverloadFunc {
public:int foo() { return 0; }int foo(int a) { return a;}
};TEST(TestCppMockFree, CaseOverloadFunction)
{OverloadFunc overload_func;typedef int (OverloadFunc::*FuncType0)();typedef int (OverloadFunc::*FuncType1)(int);auto mock0 MOCKER((FuncType0)OverloadFunc::foo);EXPECT_CALL(*mock0, MOCK_FUNCTION(_)).WillRepeatedly(Return(2));EXPECT_EQ(2, overload_func.foo());auto mock1 MOCKER((FuncType1)OverloadFunc::foo);EXPECT_CALL(*mock1, MOCK_FUNCTION(_, _)).WillRepeatedly(Return(2));EXPECT_EQ(2, overload_func.foo(1));mock0-RestoreToReal();mock1-RestoreToReal();EXPECT_EQ(2, overload_func.foo(1));mock0-RestoreToReal();mock1-RestoreToReal();EXPECT_EQ(0, overload_func.foo());EXPECT_EQ(1, overload_func.foo(1));
}1.5 模板类成员函数
// template class
template class T
class AdderT {
public:T add(T a, T b) { return a b; }T add(T a, T b, T c) { return a b c; }T adder(T a) { return a; }
};TEST(TestCppMockFree, CaseTemplateFunction)
{AdderTint adder;// overload functiontypedef int (AdderTint::*FuncType0)(int, int);auto mock0 MOCKER((FuncType0)AdderTint::add);EXPECT_CALL(*mock0, MOCK_FUNCTION(_, _, _)).WillRepeatedly(Return(1));EXPECT_EQ(1, adder.add(1, 2));auto mock1 MOCKER((FuncType1)AdderTint::add);EXPECT_CALL(*mock1, MOCK_FUNCTION(_, _, _, _)).WillRepeatedly(Return(1));EXPECT_EQ(1, adder.add(1, 2));auto mock1 MOCKER((FuncType1)AdderTint::add);EXPECT_CALL(*mock1, MOCK_FUNCTION(_, _, _, _)).WillRepeatedly(Return(1));EXPECT_EQ(1, adder.add(1, 2, 3));mock0-RestoreToReal();mock1-RestoreToReal();EXPECT_EQ(3, adder.add(1, 2));EXPECT_EQ(6, adder.add(1, 2, 3));// normal functionauto mock2 MOCKER(AdderTint::adder);EXPECT_CALL(*mock2, MOCK_FUNCTION(_, _)).WillRepeatedly(Return(1));EXPECT_EQ(1, adder.adder(2));mock2-RestoreToReal();EXPECT_EQ(2, adder.adder(2));
}1.6 外部库函数
TEST(TestCppMockFree, CaseOtherLibrary)
{auto mock MOCKER(std::atoi);EXPECT_CALL(*mock, MOCK_FUNCTION(_)).WillRepeatedly(Return(22867));EXPECT_EQ(22867, std::atoi(123));mock-RestoreToReal();EXPECT_EQ(123, std::atoi(123));
} 2. 引入cppmockfree
git clone https://github.com/gzc9047/CppFreeMock.git注意在引入cppmockfree之前请务必引入gtest和gmock。如何引入在我之前的文章中均有提及。
3. makefile
CXX g
CXXFLAGS -Wall
LIBES -lgtest -lgtest_main -lpthread
LPATH -L/tools/googletest/1.11.0/build/lib # 替换成自己lib路径
HPATH -I/tools/googletest/1.11.0/googletest/include/ # 替换成自己的include路径
HPATH -I/xxx/cpp_freemock/ #替换成自己的include路径UTEST_OBJD hello_unit_testhello_unit_test:hello_unit_test.cpp${CXX} -o $ $ -I ../ ${HPATH} ${CXXFLAGS} ${LIBES} ${LPATH}clean:rm -rf *_unit_test总结
CPPMockFree能够支持几乎所有场景下的接口mockEXPECT_CALL的使用和gmock基本一致更多的接口如SaveArg、SetArgReferee等请参考gmock文档
