c++ - CppUtest 在测试之间共享资源， undefined reference

Question

我认为这是一个简单的问题...我希望变量 virtualLeds 在测试组 LedDriverTests 中的所有测试之间共享，这是代码:

#include "CppUTest/TestHarness.h"
#include <stdint.h>

extern "C"
{
    #include "led_driver.h"
}

TEST_GROUP(LedDriverTests)
{
    static uint16_t virtualLeds;

    void setup()
    {
    }

    void teardown()
    {
    }

    void expect(void)
    {
    }

    void given(void)
    {
    }
};

TEST(LedDriverTests, AllOffAtInitialization)
{
    // Set all the bits to 1, the LEDs are turned ON by hardware.
    virtualLeds = 0xFFFF;
    led_driver_create(&virtualLeds);
    LONGS_EQUAL(0x0000, virtualLeds);
}

TEST(LedDriverTests, TurnOnLedOne)
{
    led_driver_turn_on(1);
    LONGS_EQUAL(0x0001, virtualLeds);
}

TEST(LedDriverTests, TurnOffLedOne)
{
    led_driver_turn_on(1);
    led_driver_turn_off(1);
    LONGS_EQUAL(0x0000, virtualLeds);
}

当我尝试编译时出现以下错误:

undefined reference to `TEST_GROUP_CppUTestGroupLedDriverTests::virtualLeds'

有什么想法吗？

Answer 1

TEST_GROUP 宏创建一个 struct然后在该结构中创建一个静态成员。查看更多关于 static members in struct .简而言之，这就是您无法以这种方式访问​​它的原因 virtualLeds = 0xFFFF;

查看您的代码。我想你想要做的是:

TEST_GROUP(LedDriverTests)
{
    uint16_t virtualLeds;

    void setup()
    {
        // Set all the bits to 1, the LEDs are turned ON by hardware.
        virtualLeds = 0xFFFF;
    }

};

TEST(LedDriverTests, AllOffAtInitialization)
{
    led_driver_create(&virtualLeds);
    LONGS_EQUAL(0x0000, virtualLeds);
}

TEST(LedDriverTests, TurnOnLedOne)
{
    led_driver_turn_on(1);
    LONGS_EQUAL(0x0001, virtualLeds);
}

TEST(LedDriverTests, TurnOffLedOne)
{
    led_driver_turn_on(1);
    led_driver_turn_off(1);
    LONGS_EQUAL(0x0000, virtualLeds);
}

setup() 在运行每个 TEST

之前被调用

记住 unit tests should pass or fail independently of other tests .