如何使用谷歌测试，测试的C静态函数 [英] how to test static functions of C using google test

问题描述

我有一个C文件中包含一些静态的功能，如何使用谷歌测试来测试这些静电功能？

I have a C file contains some static functions, how to use google test to test those static function?

头文件：

test.h
int accessData();

源文件：

test.c
static int value;
static int getData()
{
   return value;
}

int accessData()
{
    if(value != 0)
    {
       return getData();
    }
    return 0;
}

静态函数由全局函数调用，但如何使用谷歌测试，以测试这些静电功能？

static function is called by global function, but how to test those static function using google test?

推荐答案

一个实现这一目标的方法是的#include C源文件到您的测试源。然后，静态的功能是同一个翻译单元测试code的一部分，可以从它被称为：

One way to achieve this is to #include the C source file into your test source. Then, the static function is part of the same translation unit as the test code, and can be called from it:

#include "test.c"

/* here follow the tests of getData() */

这样做的缺点是，一切都在 test.c以被再次编译，对生成时间明显影响。如果得到是一个问题，你可以考虑提取静态函数被测试到自己的源文件（如 test_p.c ，用 _p 意思是私人/内部）。然后的#includetest_p.c来自 test.c以和单元测试。

The downside to this is that everything in test.c gets compiled again, with obvious impact on build times. If that gets to be a problem, you might consider extracting the static functions to be tested into their own source file (e.g. test_p.c, with the _p meaning private/internal). Then #include "test_p.c" from both test.c and your unit test.

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