Question

我有一个Api类，其中包含一些由Client类使用的虚拟方法。现在，我尝试使用gMock模拟Api类，以便可以在没有任何依赖关系的情况下对Client类进行单元测试。情况就是这样。

/**
 * CustomEnumStatus data type below is an enum.
 * enum CustomEnumStatus { OK = 0, WARNING, ERROR, CANCEL };
 */
class Api {

  public:
   virtual void delete();
   virtual CustomEnumStatus update();   
};

class MockApi : public Api {
  public:
    MOCK_METHOD0(delete, void());
    MOCK_METHOD0(update, CustomEnumStatus());
};

/// Testing client class code
BOOST_AUTO_TEST_CASE(TestClientMethod)
{
   MockApi mockApi;
   Client client;
   EXPECT_CALL(mockApi, update()).Times(1);
   EXPECT_CALL(mockApi, delete()).Times(1);
   client.clientMethod();
}

现在，这在Linux和Windows环境下可以正常工作，但是在达尔文环境下进行以下堆栈跟踪失败。

In file included from gmock-1.6.0-libc++build/include/gmock/gmock.h:58:
In file included from gmock-1.6.0-libc++build/include/gmock/gmock-actions.h:46:
gmock-1.6.0-libc++build/include/gmock/internal/gmock-internal-utils.h:355:10: error: indirection of non-volatile null pointer will be deleted, not trap [-Werror,-Wnull-dereference]
  return *static_cast<typename remove_reference<T>::type*>(NULL);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gmock-1.6.0-libc++build/include/gmock/gmock-actions.h:78:22: note: in instantiation of function template specialization 'testing::internal::Invalid<CustomEnumStatus>' requested here
    return internal::Invalid<T>();
                     ^
gmock-1.6.0-libc++build/include/gmock/gmock-actions.h:190:43: note: in instantiation of member function 'testing::internal::BuiltInDefaultValue<CustomEnumStatus>::Get' requested here
        internal::BuiltInDefaultValue<T>::Get() : *value_;
                                          ^
gmock-1.6.0-libc++build/include/gmock/gmock-spec-builders.h:1435:34: note: in instantiation of member function 'testing::DefaultValue<CustomEnumStatus>::Get' requested here
    return DefaultValue<Result>::Get();
                                 ^
gmock-1.6.0-libc++build/include/gmock/gmock-spec-builders.h:1334:22: note: in instantiation of member function 'testing::internal::FunctionMockerBase<CustomEnumStatus ()>::PerformDefaultAction' requested here
        func_mocker->PerformDefaultAction(args, call_description));
                     ^
gmock-1.6.0-libc++build/include/gmock/gmock-spec-builders.h:1448:26: note: in instantiation of function template specialization 'testing::internal::ActionResultHolder<CustomEnumStatus>::PerformDefaultAction<CustomEnumStatus ()>' requested here
    return ResultHolder::PerformDefaultAction(this, args, call_description);
                         ^
api_gmock.cpp:22:5: note: in instantiation of member function 'testing::internal::FunctionMockerBase<CustomEnumStatus ()>::UntypedPerformDefaultAction' requested here
    MockApi(
    ^
gmock-1.6.0-libc++build/include/gmock/internal/gmock-internal-utils.h:355:10: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
  return *static_cast<typename remove_reference<T>::type*>(NULL);
         ^
1 error generated.

如果我将Api :: update（）方法的返回类型更改为任何原始类型（例如，bool，int，...），或者如果我不模拟Api :: update（），它在所有环境下都可以正常运行方法。 CustomEnumStatus类型失败。我在这里找到了确切的堆栈跟踪：https://bugzilla.mozilla.org/show_bug.cgi?id=1142396，它声称对于他们而言，升级到gMock 1.7.0可以解决此问题。

我想知道导致此问题的原因，并且是否有任何方法可以在不升级gMock版本的情况下进行修复。我正在使用gMock 1.6.0版。

gMock在达尔文环境中测试构建失败

0 个答案: