Question

我在使用CMockery为下面显示的函数编写模拟代码时遇到问题。你能给我一些提示吗？我想测试是否调用startCalCompute并且还要为updateMode分配值，以使其不等于SYSTEM_CAL_CONFIG。我只需要一个起点或提示。

foo.c

static void checkSystem(void)
{
#ifndef CAL
    startCalCompute();
#endif

    if( SYSTEM_CAL_CONFIG != updateMode )
    {
        updateLogevent(); 
    }

    ...
}

testfoo.c

void Test_checkSystem( void ** state )
{   
    // what to do here to check if startCalCompute() is called ?
}

Answer 1

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如果SYSTEM_CAL_CONFIG取决于您从另一个函数获得的值并且您想在测试期间控制它，那么您应该创建该函数的测试双精度。 Here is a good answer explaining mocks in particular.如果它完全在updateMode内计算，那么测试驱动程序不应该修改它，因为它的目的只是检查整体结果。

checkSystem

checkSystem.c

/* checkSystem depends on a value returned by this function */ int getUpdateMode (void); /* This function knows nothing about testing. It just does whatever it was created to do. */ void checkSystem (void) { int updateMode = getUpdateMode (); if (SYSTEM_CAL_CONFIG != updateMode) { ... } }

test_checkSystem.c

我想测试/* When testing checkSystem, this function will be called instead of getUpdateMode */ int mock_getUpdateMode (void); { /* Get a value from test driver */ int updateMode = (int) mock(); /* Return it to the tested function */ return updateMode; } void test_checkSystem_caseUpdateMode_42 (void ** state) { int updateMode = 42; /* Pass a value to mock_getUpdateMode */ will_return (mock_getUpdateMode, updateMode); checkSystem (); /* Call the tested function */ assert_int_equal (...); /* Compare received result to expected */ }是否被调用

如果startCalCompute被有条件地编译为由startCalCompute()调用，那么你可以有条件地编译你想要在测试中完成的任何事情：

checkSystem()

如果您需要确保调用特定函数并且这取决于运行时条件，或者某些函数是按特定顺序调用的，那么CMockery中没有工具可以执行此操作。但是，there are中的CMocka，它是CMockery的一个分支，非常相似。以下是您在CMocka中的表现方式：

void startCalCompute (void); void checkSystem(void) { #ifdef CAL startCalCompute(); #endif } void test_checkSystem (void ** state) { #ifdef CAL ... #endif }

checkSystem.c

void startCalCompute (void); void checkSystem (void) { if (...) startCalCompute (); }

test_checkSystem.c

现在，如果/* When testing checkSystem, this function will be called instead of startCalCompute */ void __wrap_startCalCompute (void) { /* Register the function call */ function_called (); } void test_checkSystem (void ** status) { expect_function_call (__wrap_startCalCompute); checkSystem (); }无法调用checkSystem，则测试将会失败：

startCalCompute

检查使用CMockery测试的函数是否调用另一个特定函数

1 个答案: