QTimer 超时不会在单元测试中触发
QTimer timout doesnt trigger in unit testing
我正在尝试为我制作的名为Counter的类创建一个单元测试。这样的类应该每 0.1 秒减少一次它的值"count"，所以我在类构造函数中连接了该方法。在原始程序中一切似乎都很好，但是当我尝试运行单元测试仪时，似乎没有发生连接或 QTimer 根本没有发送定时信号。
gitHub链接：https://github.com/allocro/TimerLFdP/tree/master/testCounter
Counter::Counter(QLineEdit *editSec, QLineEdit *editMin, QObject *parent) :
QObject(parent)
{
timer= new QTimer(this);
[...]
connect(timer, &QTimer::timeout, this, &Counter::decCount);
}
编辑：K，我将尝试在此处安装其他代码部分，因为我被要求这样做。
在前面的代码中，这里是我要测试的类的构造函数，decCount(( 所做的就是：
void Counter::decCount(){
if (count>0)
count--;
else
timer->stop();
int countsec = count % 600;
int countmin = (count - countsec)/600;
QString secOut = QString::number(countsec/10) + "."
+QString::number(countsec%10);
emit showCountMin(countmin);
emit showCountSec(secOut);
}
上述信号与单元测试仪代码无关，它们在完整程序中使用。
现在，在tst_testCounter.cpp中，据我了解，这是经典主的测试单元版本，我得到了
testCounter::testCounter() : QObject ()
{ int i;
editSec= new QLineEdit();
editMin= new QLineEdit();
counter= new Counter(editSec, editMin);
for(i=0; i<=10; i++){
int randsec= rand() %60;
int randmin= rand() %60;
randsec=3;
randmin=0; //To test the tester faster
QString randsecString= QString::number(randsec);
QString randminString= QString::number(randmin);
editSec->setText(randsecString);
editMin->setText(randminString);
counter->set();//those are to input, they work fine, I checked
std::cout << "Starting the Timer at " << (counter->count)/10 <<
"sec" <<std::endl;
counter->start(); //{timer->start();}
while(counter->count>0){
std::cout <<counter->count <<std::endl;
}
auto end= std::chrono::system_clock::now();
counter->stop();
auto check= std::chrono::duration_cast<std::chrono::seconds>(end -
start);
int checkInt= check.count();
if(checkInt==randsec+(randmin*60)){
std::cout << "Timer matches" <<std::endl;
}else{
std::cout << "Timer doesnt match" <<std::endl;
std::cout << "Sec counted: " << (counter->count)/10 <<std::endl;
std::cout << "Sec passed: " << checkInt <<std::endl;
break;
}
}
}
显然，.cpp以
QTEST_MAIN(testCounter)
#include "tst_testcounter.moc"
您应该记住的第一件事是QTimer并不准确，因此按秒的顺序进行检查会导致问题，更好的测试可以验证以毫秒为单位的时间差小于某个值。
另一方面，随着指令：
while (counter-> count> 0) {
std::cout << counter-> count << std::endl;
}
您没有让事件循环工作，因此 QTimer 或信号可以工作。
你应该使用QCoreApplication::processEvents()：
while(counter.count>0){
QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents);
}
还建议在方法中定义测试的元素，并且测试不是在构造函数中给出，而是在插槽中给出。
考虑到上述情况并给出其他改进，得出以下结果：
计数器.h
#ifndef COUNTER_H
#define COUNTER_H
#include <QObject>
class QTimer;
class QLineEdit;
class Counter : public QObject
{
Q_OBJECT
public:
explicit Counter(QLineEdit *setterSec, QLineEdit *setterMin, QObject *parent = nullptr);
QTimer *timer;
QLineEdit *setterSec;
QLineEdit *setterMin;
int count;
signals:
void showCountSec(const QString &count);
void showCountMin(int count);
public slots:
void decCount();
void start();
void stop();
void set();
};
#endif // COUNTER_H
柜台.cpp
#include "counter.h"
#include <QTimer>
#include <QIntValidator>
#include <QLineEdit>
Counter::Counter(QLineEdit *editSec, QLineEdit *editMin, QObject *parent) :
QObject(parent),
timer(new QTimer(this)),
setterSec(editSec),
setterMin(editMin),
count(0)
{
setterSec->setValidator(new QIntValidator(0, 59, this));
setterMin->setValidator(new QIntValidator(0, 59, this));
connect(timer, &QTimer::timeout, this, &Counter::decCount);
}
void Counter::start(){
timer->start(100);
}
void Counter::stop(){
timer->stop();
}
void Counter::set(){
timer->stop();
count = setterSec->text().toInt()*10 + setterMin->text().toInt()*600;
int countsec = count % 600;
int countmin = (count - countsec)/600;
QString secOut = QString::number(countsec/10) + "." +QString::number(countsec%10);
emit showCountMin(countmin);
emit showCountSec(secOut);
}
void Counter::decCount(){
if (count > 0)
count--;
else
timer->stop();
int countsec = count % 600;
int countmin = (count - countsec)/600;
QString secOut = QString::number(countsec/10) + "." +QString::number(countsec%10);
emit showCountMin(countmin);
emit showCountSec(secOut);
}
tst_counter.h
#include <QtTest>
#include "counter.h"
#include <QLineEdit>
#include <iostream>
#include <cmath>
#include <QDebug>
// add necessary includes here
class tst_Counter : public QObject
{
Q_OBJECT
public:
tst_Counter();
~tst_Counter();
private slots:
void initTestCD();
};
tst_Counter::tst_Counter() : QObject ()
{
}
tst_Counter::~tst_Counter()
{
}
void tst_Counter::initTestCD(){
QLineEdit editSec;
QLineEdit editMin;
Counter counter(&editSec, &editMin);
const int epsilon = 50; // ms
for(int i=0; i<=10; i++){
int randsec= rand() %60;
int randmin= rand() %60;
randsec =3;
randmin =0; //To test the tester faster
QString randsecString= QString::number(randsec);
QString randminString= QString::number(randmin);
editSec.setText(randsecString);
editMin.setText(randminString);
counter.set();//those are to input, they work fine, I checked
qDebug() << "Starting the Timer at " << (counter.count)/10;
auto start= std::chrono::system_clock::now();
counter.start(); //{timer->start();}
while(counter.count>0){
QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents);
}
auto end= std::chrono::system_clock::now();
counter.stop();
auto check_ms= std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
int checkInt = check_ms.count();
int delta_s = randsec + randmin*60;
int delta = std::abs(checkInt - delta_s);
QVERIFY(delta < epsilon);
qDebug() << "Sec counted: " << counter.count/10;
qDebug() << "msec passed: " << checkInt;
}
}
QTEST_MAIN(tst_Counter)
#include "tst_counter.moc"
输出：
********* Start testing of tst_Counter *********
Config: Using QtTest library 5.11.2, Qt 5.11.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 8.2.1 20180831)
PASS : tst_Counter::initTestCase()
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 3033
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 3000
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 3000
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
QDEBUG : tst_Counter::initTestCD() Starting the Timer at 3
QDEBUG : tst_Counter::initTestCD() Sec counted: 0
QDEBUG : tst_Counter::initTestCD() msec passed: 2999
PASS : tst_Counter::initTestCD()
PASS : tst_Counter::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 33078ms
********* Finished testing of tst_Counter *********
在下面的链接中，您可以找到完整的示例。
相关文章：
- 有什么好的方法可以让系统调用代理允许在单元测试中进行模拟
- 在子目录中使用target_sources(）命令时用于单元测试(qtest）的项目结构
- VC++本机单元测试，找不到调试符号
- 用于交叉编译和CMake的预处理器宏的单元测试
- C++ 用于单元测试的模板模板
- 提升 1.64 单元测试编译失败
- 单元测试欧拉到四元数实现失败
- 运行 C++ 单元测试时LNK2005链接错误
- 禁用自动捕获 Googletest 单元测试中的C++异常
- 有没有办法在不使用 #ifdef 的情况下不编译发布版本中的单元测试函数体?
- 使用 Google Test 对自定义断言函数进行单元测试
- 如何将我的 CMake 项目配置为运行所有单元测试?
- 在Qt C++单元测试中动态加载QQuickWindow而不是QQuickWidget
- MS 本机单元测试 - 断言：：线程失败不起作用
- 如何获取 CMake 单元测试的相对路径?
- QTimer 超时不会在单元测试中触发
- 如何在提升构建中设置环境变量以进行提升单元测试框架?
- 在 AtMega32a 上运行的C++的单元测试
- 使用 gtest 框架在单元测试代码中检查目标对象的私有变量的最佳实践是什么？
- 如何用 c++ 编写单元测试?
