如何使 Google 测试正常运行。测试总是失败。（它不会编译）

Question

我的 Google 测试应用程序中的单元测试出现问题。如果我的代码收到错误的日期或错误的日期格式，我想测试它是否会产生异常。我对它使用了正则表达式。我正在使用 Google 测试框架 v1.10.0 和 TDM GCC（GNU G++ GCC C++ 编译器 9.2.0）和 CodeBlocks IDE 20.03。我正在使用 C++ 11。使用 Windows 10.

编译时出现这个错误：

||=== Build: Debug in GT_wsDB_Record_Class (compiler: GNU GCC Compiler) ===|
C:\Users\Donald\Documents\CodeBlocks\GT_Original\GT_wsRecord\GT_wsDB_Record_Class\GT_wsRecord_Test.cpp||In member function 'virtual void wsRecords::wsRecordTest_DoesItThrowExceptionWhenWrongDateIsProvided_Test::TestBody()':|
C:\Users\Donald\Documents\CodeBlocks\GT_Original\GT_wsRecord\GT_wsDB_Record_Class\GT_wsRecord_Test.cpp|28|error: expected ';' before '{' token|
..\..\..\GoogleTest\googletest\googletest\include\gtest\internal\gtest-internal.h|1290|note: in definition of macro 'GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_'|
..\..\..\GoogleTest\googletest\googletest\include\gtest\gtest.h|1970|note: in expansion of macro 'GTEST_TEST_THROW_'|
C:\Users\Donald\Documents\CodeBlocks\GT_Original\GT_wsRecord\GT_wsDB_Record_Class\GT_wsRecord_Test.cpp|28|note: in expansion of macro 'ASSERT_THROW'|
C:\Users\Donald\Documents\CodeBlocks\GT_Original\GT_wsRecord\GT_wsDB_Record_Class\GT_wsRecord_Test.cpp|28|warning: statement has no effect [-Wunused-value]|
..\..\..\GoogleTest\googletest\googletest\include\gtest\internal\gtest-internal.h|1290|note: in definition of macro 'GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_'|
..\..\..\GoogleTest\googletest\googletest\include\gtest\gtest.h|1970|note: in expansion of macro 'GTEST_TEST_THROW_'|
C:\Users\Donald\Documents\CodeBlocks\GT_Original\GT_wsRecord\GT_wsDB_Record_Class\GT_wsRecord_Test.cpp|28|note: in expansion of macro 'ASSERT_THROW'|
||=== Build failed: 1 error(s), 1 warning(s) (0 minute(s), 1 second(s)) ===|

我正在尝试学习 TDD，但我似乎无法通过测试。生产代码有效，只是测试无效。我已经努力解决了 1.5 天，所以现在就这样尝试。

希望有人能帮助我。

你好，

唐.

这是主要的测试文件GT_wsRecord_Test.cpp:

/***************************************/
/* wsDB Record Class - UnitTest        */
/* Framework: Google Test v1.10.0      */
/* Author: D. Voogd - Date: 11-06-2020 */
/***************************************/

#include <gtest/gtest.h>
#include "GT_wsRecord.h"
#include <string>    
namespace wsRecords
{
class wsRecordTest : public ::testing::Test
{
public:

protected:
    weatherdayRecord wsRecord{"2020-10-03"};
};

TEST_F(wsRecordTest,DoIGetTheRightTimeFromTheConstructor)
{
    std::string wsTime = wsRecordTest::wsRecord.getTime();
    ASSERT_EQ(wsTime,"2020-10-03");
}
TEST_F(wsRecordTest,DoesItThrowExceptionWhenWrongDateIsProvided)
{
    ASSERT_THROW(wsRecord{"2002-20-41"},std::invalid_argument);
}
}

这是定义文件GT_wsRecord.h:

#ifndef GT_WSRECORD_H_INCLUDED
#define GT_WSRECORD_H_INCLUDED

#include <string>

namespace wsRecords
{

class weatherdayRecord
{

public:

// constructor
    weatherdayRecord(std::string time_day);
// destructor
    ~weatherdayRecord();

    // accessors
    std::string getTime() const; // get the time from the day.

    /*
    std::string getWeatherCon() const; // get the weather conditions
    double getMinTemp() const; // get the minimum temperature
    double getMaxTemp() const; // get the maximum temperature
    double getWindSpeed() const; // get the wind speed
    std::string getSymbolVar() const; // get the symbol var for the weather icon
    */

    protected:
    std::string time_day; // date of the day.

    /*
    std::string weather_condition; // weather condition of the day
    double min_temperature; // minimum temperature of the day
    double max_temperature; // maximum temperature of the day
    double wind_speed; // maximum weed speed in meters/sec.
    std::string symbol_var; // symbol that resembles the weather icon
    */
};

}


#endif // GT_WSRECORD_H_INCLUDED

这是实现文件 GT_wsRecord.cpp:

/***************************************/
/* wsDB Record Class - UnitTest        */
/* Framework: Google Test v1.10.0      */
/* Author: D. Voogd - Date: 11-06-2020 */
/* Implementation                      */
/***************************************/

#include <iostream>
#include <regex>
#include "GT_wsRecord.h"
namespace wsRecords{

weatherdayRecord::weatherdayRecord(std::string time_day)
{
 this->time_day = time_day;
}

weatherdayRecord::~weatherdayRecord() {
    ;
}

std::string weatherdayRecord::getTime() const// get the time from the day.
{
    auto const regex = std::regex("((?:19|20)\d\d)-(0?[1-9]|1[012])-([12][0-9]|3[01]|0?[1-9])"); // Regex YYYY-MM-DD
    bool const TimeDayContainsRegex = std::regex_search(time_day, regex);
    if(TimeDayContainsRegex == true)
    {
    return time_day;
    }
    else
    {
        throw std::invalid_argument("Wrong date or dateformat.");
    }
}
}

Answer 1

您可能想做这样的事情：

TEST_F(wsRecordTest,DoIGetTheRightTimeFromTheConstructor)
{
    weatherdayRecord wsRecord{"2020-10-03"};
    std::string wsTime = wsRecord.getTime();
    ASSERT_EQ(wsTime,"2020-10-03");
}
TEST_F(wsRecordTest,DoesItThrowExceptionWhenWrongDateIsProvided)
{
    weatherdayRecord wsRecord{"2020-20-41"};
    ASSERT_THROW(wsRecord.getTime(),std::invalid_argument);
}

您想在第二个测试中测试 getTime() 函数是否抛出异常，因此您首先需要创建一个带有错误日期的 weatherdayRecord（我认为您正试图在您的原代码）。

请注意，不需要 wsRecord 数据成员。只有当多个测试需要以相同方式构造的相同对象时，夹具数据成员才是必需的。在您的情况下，您需要为每个测试构建不同的 weatherdayRecord。

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