I have some experience in C and C++. But I am new to googletest and googlemock. I am trying unit testing for C++ Programs. I did not get any error while I was working on googletest. But, when I started working on googlemock, I got problems. I have a simple code for working with googlemock, and when I tried to build it with the command
g++ mock.cpp -lgtest -lgtest_main -lgmock -pthread
I get this error which I am not able to understand. (I have attached both the program and the error which I got).
Please help me to understand it and overcome. Thanks in advance.
mock.cpp
#include<iostream>
#include<vector>
#include<gtest/gtest.h>
#include<gmock/gmock.h>
using namespace std;
using ::testing::AtLeast;
using ::testing::Return;
using ::testing::_;
class DataBaseConnect{
public:
virtual bool login(string username, string password){ return true; }
virtual bool logout(string username){ return true; }
virtual int fetchRecord(){ return -1; }
};
class MockDB : public DataBaseConnect{
public:
MOCK_METHOD0(fetchRecord, int());
MOCK_METHOD1(logout, bool(string username));
MOCK_METHOD2(login, bool(string username, string password));
};
class MyDatabase{
DataBaseConnect & dbC;
public:
MyDatabase(DataBaseConnect & _dbC) : dbC(_dbC) {}
int Init(string username, string password){
if(dbC.login(username, password) != true){
cout<<"DB FAILURE\n";
return -1;
}
else{
cout<<"DB SUCCESS\n";
return 1;
}
}
};
TEST(MyDBTest, LoginTest){
//Arrange
MockDB mdb;
MyDatabase db(mdb);
EXPECT_CALL(mdb, login(_, _))
.Times(1)
.WillOnce(Return(true));
//Act
int retVal = db.Init("Terminator", "I'm Back");
//Assert
EXPECT_EQ(retVal, 1);
}
int main(int argc, char **argv){
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
command:
g++ mock.cpp -lgtest -lgmock -lgtest_main -pthread
error:
g++ mock.cpp -lgtest -lgmock -lgtest_main -pthread
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::linked_ptr_internal::join(testing::internal::linked_ptr_internal const*)':
mock.cpp:(.text._ZN7testing8internal19linked_ptr_internal4joinEPKS1_[_ZN7testing8internal19linked_ptr_internal4joinEPKS1_]+0x2a): undefined reference to `testing::internal::g_linked_ptr_mutex'
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::linked_ptr_internal::depart()':
mock.cpp:(.text._ZN7testing8internal19linked_ptr_internal6departEv[_ZN7testing8internal19linked_ptr_internal6departEv]+0x27): undefined reference to `testing::internal::g_linked_ptr_mutex'
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::FunctionMockerBase<int ()>::InvokeWith(std::tuple<> const&)':
mock.cpp:(.text._ZN7testing8internal18FunctionMockerBaseIFivEE10InvokeWithERKSt5tupleIJEE[_ZN7testing8internal18FunctionMockerBaseIFivEE10InvokeWithERKSt5tupleIJEE]+0x33): undefined reference to `testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith(void const*)'
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::FunctionMockerBase<bool (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)>::InvokeWith(std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&)':
mock.cpp:(.text._ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE10InvokeWithERKSt5tupleIJS7_EE[_ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE10InvokeWithERKSt5tupleIJS7_EE]+0x33): undefined reference to `testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith(void const*)'
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::FunctionMockerBase<bool (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)>::InvokeWith(std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > const&)':
mock.cpp:(.text._ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES7_EE10InvokeWithERKSt5tupleIJS7_S7_EE[_ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES7_EE10InvokeWithERKSt5tupleIJS7_S7_EE]+0x33): undefined reference to `testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith(void const*)'
/usr/bin/ld: /tmp/ccFl5wbu.o: in function `testing::internal::FunctionMockerBase<bool (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)>::AddNewExpectation(char const*, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::tuple<testing::Matcher<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, testing::Matcher<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)':
mock.cpp:(.text._ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES7_EE17AddNewExpectationEPKciRKS7_RKSt5tupleIJNS_7MatcherIS7_EESG_EE[_ZN7testing8internal18FunctionMockerBaseIFbNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES7_EE17AddNewExpectationEPKciRKS7_RKSt5tupleIJNS_7MatcherIS7_EESG_EE]+0xda): undefined reference to `testing::Expectation::Expectation(testing::internal::linked_ptr<testing::internal::ExpectationBase> const&)'
collect2: error: ld returned 1 exit status
