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，我收到以下错误：

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。详细了解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;

查看你的代码。我想你想做的是：

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);
}

在运行每个setup()

之前调用

TEST

请记住unit tests should pass or fail independently of other tests。

Answer 2

您必须为静态成员添加定义：

TEST_GROUP(LedDriverTests)
{
    static uint16_t virtualLeds;

    // ...
};

// Definition of static data
uint16_t TEST_GROUP_CppUTestGroupLedDriverTests::virtualLeds;

// ...

CppUtest在测试之间共享资源，未定义引用

2 个答案: