Question

我正在尝试创建一个堆栈，并在使用C ++ Google Test框架的实验中使用Google测试对其进行测试。我已经设置了结构，所以我有一个stack.h和stack.cpp用于实现，然后我有一个带有以下代码的tests.cpp。我有几个问题：首先，是否可以像我一样从主要调用我的测试功能？另外，我是否包括正确的一切？为什么会出现构建错误？对不起，我是C ++的新手，感谢您的帮助。这是代码和错误：

#include "stack.h"
#include "gtest/gtest.h"

TEST (StackTest, PushAndPeek) {
    Stack<int> intStack;
    int a = 12;
    int b = 15;
    EXPECT_EQ (12, intStack.push(a));
    EXPECT_EQ (15, intStack.push(b));
    EXPECT_EQ (15, intStack.peek()); //make sure adding in LIFO Order
    EXPECT_EQ (15, intStack.peek()); //Should still be there
}

TEST (StackTest, PushAndPop) {
    Stack<int> intStack;
    int a = 12;
    int b = 15;
    EXPECT_EQ (12, intStack.push(a));
    EXPECT_EQ (15, intStack.push(b));
    EXPECT_EQ (15, intStack.pop()); //make sure adding in LIFO Order
    EXPECT_EQ (12, intStack.pop()); //Should have removed 15, then removed 12
    EXPECT_EQ (-1, intStack.pop()); //Should return -1 because there is nothing on the stack
}

然后在我的main.cpp中我有：

#include <iostream>
#include <string>
#include "gtest/gtest.h"
#include "stack.h"
using namespace std;

int main(int argc, char * argv[])
{
    string input;
    cout << "Hey there! If you wanna run the tests, type in tests. \nOther wise just hit enter to continue...\n";
    getline (cin, input);
    if(input == "tests"){
        ::testing::InitGoogleTest(&argc, argv);
        return RUN_ALL_TESTS();
    }

    return 0;
}

但是，我正在使用XCode进行编译，但由于以下原因而无法构建：

Undefined symbols for architecture x86_64:
  "Stack<int>::pop()", referenced from:
      StackTest_PushAndPop_Test::TestBody() in tests.o
  "Stack<int>::peek()", referenced from:
      StackTest_PushAndPeek_Test::TestBody() in tests.o
  "Stack<int>::push(int&)", referenced from:
      StackTest_PushAndPeek_Test::TestBody() in tests.o
      StackTest_PushAndPop_Test::TestBody() in tests.o
  "Stack<int>::Stack()", referenced from:
      StackTest_PushAndPeek_Test::TestBody() in tests.o
      StackTest_PushAndPop_Test::TestBody() in tests.o
  "Stack<int>::~Stack()", referenced from:
      StackTest_PushAndPeek_Test::TestBody() in tests.o
      StackTest_PushAndPop_Test::TestBody() in tests.o
  "testing::internal::EqFailure(char const*, char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, bool)", referenced from:
      testing::AssertionResult testing::internal::CmpHelperEQ<int, int>(char const*, char const*, int const&, int const&) in tests.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

编辑：通过包含stack.cpp我解决了与此相关的错误，但我仍然有以下错误：

Undefined symbols for architecture x86_64:
  "testing::internal::EqFailure(char const*, char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, bool)", referenced from:
      testing::AssertionResult testing::internal::CmpHelperEQ<int, int>(char const*, char const*, int const&, int const&) in tests.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

初看起来好像你的初学者错误地使用了模板：模板必须在头文件中实现，你不能在头文件和.cpp文件中将它们分开，就像普通的类和函数一样。只需search for "undefined refernce" and "template"就可以了，您将获得有关此事的大量信息： - ）

如何从C ++中的另一个主要功能调用Google测试

1 个答案: