利用google test 与QTest进行GUI 测试

 利用google test 与QTest进行GUI 测试
Jingwenlai 2009-11-10


Google test写测试用例非常方便，而且相对于QTest来说，提供了更多的比较宏，但其并未提供测试GUI的方法，相反，Qt Test lib虽然仅提供了QCOMPARE等少数的宏，但QtTest提供了诸如keyClick,keyClicks,mouseClicks,mouseClick等模拟UI行为的测试方法。可以将两者结合起来对QT的GUI程序进行测试，同时，也能够利用Google Test的便利性来写测试程序。  please refer to QtAssitant.exe for more informations about QtTest lib.
下面是一个示例程序
    这个示例完成如下功能，根据用户的输入对显示的值进行增减。
 执行了五个测试，其中一个是初始化测试，另外两个是正常情况的测试，还有两种情况是极端情况的测试。



以下是测试代码/**Testing Code;*/
#ifndef TEST_PANELITEM_HPP
#define TEST_PANELITEM_HPP

#include <gtest/gtest.h>
#include "PanelItem.h"
#include <QtTest/QtTest> //for testing Gui
#include <QString>

class GPanelItemTest : public ::testing::Test
{
protected:
    virtual void SetUp()
    {
        panelItem = new GPanelItem();
    }
    virtual void TearDown()
    {
        delete panelItem;
    }

    GPanelItem * panelItem;
};


TEST_F(GPanelItemTest,testInit)
{
}

//GUI testing using QtTest
TEST_F(GPanelItemTest,testIncButton)
{
    panelItem->reset();
    QTest::mouseClick(panelItem->getIncreaseButton(),Qt::LeftButton);
    QCOMPARE(panelItem->getNumLabel()->text(),QString("1"));
}

TEST_F(GPanelItemTest,testDescButton)
{
    panelItem->setValue(1);
    QCOMPARE(panelItem->getNumLabel()->text(),QString("1"));
    QTest::mouseClick(panelItem->getDecreaseButton(),Qt::LeftButton);
    QCOMPARE(panelItem->getNumLabel()->text(),QString("0"));
}

TEST_F(GPanelItemTest,testIncButtonEdge)
{
    panelItem->setValue(9);
    QTest::mouseClick(panelItem->getIncreaseButton(),Qt::LeftButton);
    QCOMPARE(panelItem->getNumLabel()->text(),QString("9"));
}

TEST_F(GPanelItemTest,testDescButtonEdge)
{
    panelItem->setValue(0);
    QTest::mouseClick(panelItem->getDecreaseButton(),Qt::LeftButton);
    QCOMPARE(panelItem->getNumLabel()->text(),QString("0"));
}

#endif

//PenalItem 类：
#ifndef PANELITEM_H
#define PANELITEM_H

#include <QWidget>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QPushButton>
#include <QLabel>
#include <QObject>

class GPanelItem : public QWidget
{
    Q_OBJECT
public:
    GPanelItem(QWidget * parent = 0) : QWidget(parent)
    {
        increaseButton = new QPushButton(QString(tr("<")),this);
        QObject::connect(increaseButton,SIGNAL(clicked()),this,SLOT(increaseNum()));
        decreaseButton = new QPushButton(QString(tr(">")),this);
        QObject::connect(decreaseButton,SIGNAL(clicked()),this,SLOT(decreaseNum()));
        value = 0;
        numLabel = new QLabel();
        numLabel->setNum(value);
    }
    ~GPanelItem()
    {
        delete increaseButton;
        delete decreaseButton;
        delete numLabel;
    }
public:
    void reset()
    {
        setValue(0);
    }
    void setValue(int value)
    {
        this->value = value;
        numLabel->setNum(value);
    }
private slots:
    void increaseNum()
    {
        if(value < 9)
            value++;
        numLabel->setNum(value);
    }
    void decreaseNum()
    {
        if(value > 0)
            value--;
        numLabel->setNum(value);
    }
public:
    QPushButton * getIncreaseButton() { return increaseButton; }
    QPushButton * getDecreaseButton() { return decreaseButton; }
    QLabel * getNumLabel() { return numLabel; }
private:
    QPushButton* increaseButton;
    QPushButton* decreaseButton;
    QLabel * numLabel;
private:
    int value;
};

#endif
//主程序
#include <QApplication>
#include "PanelItem.hpp"
#include <gtest/gtest.h>
#include "test.hpp"

int main(int argc,char ** argv)
{
  QApplication app(argc,argv);

  ::testing::InitGoogleTest(&argc,argv);
  RUN_ALL_TESTS();

  GPanelItem * panelItem = new GPanelItem();
  panelItem->show();

  return app.exec();
}

对应的CMakeLists.txt 如下:
project(QViewpad)
cmake_minimum_required(VERSION 2.6)

set(SOURCES main.cpp PanelItem.cpp)
set(HEADERS PanelItem.hpp)

find_package(Qt4 COMPONENTS QtTest QtGui QtCore REQUIRED)
if(QT4_FOUND)
  include(${QT_USE_FILE})
endif()

qt4_wrap_cpp(GPanelItem_Moc PanelItem.hpp)

add_executable(viewpad ${SOURCES} ${GPanelItem_MOC})
target_link_libraries(viewpad ${QT_LIBRARIES} gtest gtest_main)