Question

所以我想尝试TDD并将CppUnit设置为测试环境。我想从小处开始阅读食谱。我只想测试类Factor的公共阶乘函数。我的测试运行成功，但是程序突然核心转储，我不知道为什么。我在Ubuntu 18.04 64位和CppUnit 1.14上使用g ++。

testmain.cpp

#include "test1.h"

int main(){

    CppUnit::TestCaller <Test1> test ("test", &Test1::testFactorial );

    CppUnit::TestSuite suite;
    suite.addTest(&test);

    CppUnit::TextUi::TestRunner runner;
    runner.addTest(&suite);
    runner.run( );
    return 0;
}

test1.h

#ifndef TEST1_H
#define TEST1_H

#include <cppunit/TestAssert.h>
#include <cppunit/TestCase.h>
#include <cppunit/TestFixture.h>
#include <cppunit/TestCaller.h>
#include <cppunit/TestResult.h>
#include <cppunit/ui/text/TestRunner.h>
#include <cppunit/TestSuite.h>

#include "factorial.h"

class Test1 : public CppUnit::TestFixture {
private:
    Factor *f_6;

public:
    void setUp(){
        f_6 = new Factor();
    }

    void tearDown(){
        //to see whether my variable gets freed
        std::cout << "delete testvariable\n";
        delete f_6;
    }

    void testFactorial(){
        int f6 = f_6->factorial(6);
        CPPUNIT_ASSERT(f6 == 720);
    }
};

#endif

factorial.h

#ifndef FACTORIAL_H
#define FACTORIAL_H

class Factor{

public:
    int factorial(int arg){
        int result = 1;
        for(int i = 1; i <= arg; i++){
            result *= i;
        }
        return result;
    }

};

#endif

命令行输出：

user@computer:~/folder$ make test
g++ -g -Wall -o testexecutable testmain.cpp -lcppunit
user@computer:~/folder$ ./testexecutable 
.delete testvariable



OK (1 tests)


free(): invalid size
Aborted (core dumped)
user@computer:~/folder$

为什么在执行测试用例时会有这种奇怪的自由和核心转储？

Answer 1

CppUnit测试套件删除析构函数中的所有测试对象。因此，您需要在主测试中分配测试，而不是直接在堆栈中使用测试。

类似地，我认为TestRunner也会进行清理，因此您也需要分配TestSuide对象。

在以下位置查看“ Suite”和“ TestRunner”标题： http://cppunit.sourceforge.net/doc/cvs/cppunit_cookbook.html

因此您的主要人员变为：

class Account(models.Model):
name = models.CharField(max_length=100)
budget = models.IntegerField()
slug = models.SlugField(max_length=100, blank=True)


def save_account(self):
    self.save()

def budget_left(self):
    expense_list = Expense.objects.filter(account = self)
    total_expense = 0
    for expense in expense_list:
        total_expense += expense.amount
    return self.budget - total_expense

class ExpenseCategory(models.Model):
account = models.ForeignKey(Account, on_delete=models.CASCADE)
name = models.CharField(max_length=50)

class Expense(models.Model):
account = models.ForeignKey(Account, on_delete=models.CASCADE, related_name="expense")
title = models.CharField(max_length=100)
amount = models.DecimalField(max_digits=8, decimal_places=2)
category = models.ForeignKey(ExpenseCategory, on_delete=models.CASCADE)

class Meta:
    ordering = ('-amount',)

尽管测试成功，但CppUnit测试核心已转储。为什么？

1 个答案: