为什么JPanelFixture.comboBox（）。pressAndReleaseKeys（）与FEST一起使用，而不与AssertJ一起使用？

时间：2019-03-22 18:22:56

标签： java swing junit assertj fest

当尝试使用AssertJ的pressAndReleaseKeys（）模拟输入以对Java Swing程序中的JComboBox进行单元测试时，我没有看到预期的行为。该程序通常会挂在pressAndReleaseKeys行上，然后失败，或者偶尔会删除当前正在测试的JComboBox中的所有文本，从而导致以后的声明失败（即requireSelection（））。挂起时，我为提供的示例程序（见下文）收到的堆栈跟踪如下：

  

将焦点更改为javax.swing.JComboBox [name ='combob'，selectedItem ='Bean'，contents = [“ Pork”，“ Beans”，“ Rice”]，editable = true，enabled = true，visible = true，Showing = true]失败的焦点所有者：javax.swing.plaf.metal.MetalComboBoxEditor $ 1（javax.swing.JTextField）[name = null，text ='Bean'，enabled = true，visible = true，showing = true]

     

org.assertj.swing.exception.ActionFailedException
      在org.assertj.swing.exception.ActionFailedException.actionFailure（ActionFailedException.java:33）
      在org.assertj.swing.core.BasicRobot.focus（BasicRobot.java:301）
      在org.assertj.swing.core.BasicRobot.focusAndWaitForFocusGain（BasicRobot.java:270）
      在org.assertj.swing.driver.ComponentDriver.focusAndWaitForFocusGain（ComponentDriver.java:419）
      在org.assertj.swing.driver.ComponentDriver.pressAndReleaseKeys（ComponentDriver.java:315）
      在org.assertj.swing.fixture.AbstractComponentFixture.pressAndReleaseKeys（AbstractComponentFixture.java:293）
      在javapractice.ComboBoxSampleTest.testMain（ComboBoxSampleTest.java:59）

我一直在使用FEST，并希望将其测试迁移到AssertJ，因为它一直处于主动维护状态，而FEST多年没有更新。我使用了Joel Costigliola的migration from Fest to AssertJ指南，但是在使用pressAndReleaseKeys（）模拟键盘输入时遇到了麻烦。使用JTextComponentFixture时，我可以模拟输入。

window.textBox("textB").pressAndReleaseKeys(KeyEvent.VK_LEFT);

（其中窗口是FrameFixture，是AssertJ和FEST中的容器），但是使用JComboBoxFixture即无法模拟输入。

window.comboBox("comboB").pressAndReleaseKeys(KeyEvent.VK_LEFT);

通常可以避免此障碍，因为大多数“按键”都可以通过使用enterText来模拟。

window.comboBox("comboB").enterText("\n"); //to press the enter key
window.comboBox("comboB").enterText("\b"); //to press the backspace key

但是我希望能够使用箭头键，控制键和其他无法使用enterText（）模拟按键的键。该失败是由于我的环境*，我使用方式的问题还是API本身存在缺陷？

我尝试使用pressKey（），然后使用releaseKey（）作为一种解决方法，但是这也不适用于JComboBox，而我的程序却挂在pressKey（）上。话虽如此，我也无法使用pressKey（）和releaseKey（）来通过FEST测试JComboBox。

*环境详细信息：
语言版本：Java版本“ 1.8.0_131”
平台版本（例如.NET 3.5；请注意，语言版本并不总是隐含此版本，反之亦然）
操作系统：Red Hat Release 6.10（圣地亚哥）
IDE：Netbeans 8.0.2

示例GUI应用程序：

package javapractice;

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class ComboBoxSample extends JFrame implements ItemListener{
    JPanel jp;
    JComboBox jcb;
    JLabel result;
    JLabel title;
    JTextField jtc;

    public static void main(String[] args) {
        ComboBoxSample frame = new ComboBoxSample();
    }

    ComboBoxSample() {
        super();
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
        this.setTitle("Testing AssertJ");
        this.setLayout(new FlowLayout());
        jp = new JPanel();
        jcb = new JComboBox(new String[] {"Pork", "Beans", "Rice"});
        jcb.setEditable(true);
        jcb.setName("combob");
        jtc = new JTextField();
        jtc.setEditable(true);
        jtc.setPreferredSize(new Dimension(150, 25));
        jtc.setName("textb");
        title = new JLabel("Food: ");
        result = new JLabel("No food");
        jp.add(title);
        jp.add(jcb);
        jp.add(result);
        jp.add(jtc);
        this.add(jp);
        this.setLocationRelativeTo(null);
        jcb.addItemListener(this);


        this.pack();
        this.repaint();        
    }

    @Override
    public void itemStateChanged(ItemEvent e) {
        if(e.getSource() == jcb) {
            result.setText("I'm eating " + jcb.getSelectedItem());
        }
        this.pack();
    }

    public void cleanUp() {
        jcb = null;
        result = null;
        jtc = null;
        jp = null;
        title = null;
    }   
}

测试文件：

package javapractice;

import com.sun.glass.events.KeyEvent;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

/**
 * Fest imports.
 */
import org.fest.swing.edt.FailOnThreadViolationRepaintManager;
import org.fest.swing.edt.GuiActionRunner;
import org.fest.swing.edt.GuiQuery;
import org.fest.swing.fixture.FrameFixture;

public class ComboBoxSampleTest {
    private FrameFixture window;
    private ComboBoxSample frame;

    @BeforeClass
    public static void setUpClass() {
        FailOnThreadViolationRepaintManager.install();
    }

    @AfterClass
    public static void tearDownClass() {

    }

    @Before
    public void setUp() {
        frame = GuiActionRunner.execute(new GuiQuery<ComboBoxSample>() {
            @Override
            protected ComboBoxSample executeInEDT() {
                return new ComboBoxSample();
            }
        });
        window = new FrameFixture(frame);
        window.show();
    }

    @After
    public void tearDown() {
        window.cleanUp();
        frame.cleanUp();
    }

    /**
     * Test of main method, of class ComboBoxSample.
     */
    @Test
    public void testMain() {
        //Delay so that we can see what's going on
        try {
            Thread.sleep(2000);
        } catch (InterruptedException ie) {

        }

        window.textBox("textb").enterText("hi there");
        window.textBox("textb").pressAndReleaseKeys(KeyEvent.VK_BACKSPACE);
        window.comboBox().replaceText("Bean");
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_S);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_ENTER);
    }
}

AssertJ的测试文件：

package javapractice;

import com.sun.glass.events.KeyEvent;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

/**
 * AssertJ imports.
 */
import org.assertj.swing.edt.FailOnThreadViolationRepaintManager;
import org.assertj.swing.edt.GuiActionRunner;
import org.assertj.swing.fixture.FrameFixture;

public class ComboBoxSampleTest {
    private FrameFixture window;
    private ComboBoxSample frame;

    @BeforeClass
    public static void setUpClass() {
        FailOnThreadViolationRepaintManager.install();
    }

    @AfterClass
    public static void tearDownClass() {

    }

    @Before
    public void setUp() {
        frame = GuiActionRunner.execute(() -> new ComboBoxSample());
        window = new FrameFixture(frame);
        window.show();
    }

    @After
    public void tearDown() {
        window.cleanUp();
        frame.cleanUp();
    }

    /**
     * Test of main method, of class ComboBoxSample.
     */
    @Test
    public void testMain() {
        //Delay so that we can see what's going on
        try {
            Thread.sleep(2000);
        } catch (InterruptedException ie) {

        }

        window.textBox("textb").enterText("hi there");
        window.textBox("textb").pressAndReleaseKeys(KeyEvent.VK_BACKSPACE);
        window.comboBox().replaceText("Bean");
        //the above line is the last one to execute
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_S);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_DOWN);
        window.comboBox().pressAndReleaseKeys(KeyEvent.VK_ENTER);
    }
}

1 个答案:

答案 0 :(得分：0)

这不是问题的答案，而是一种允许所需行为的解决方法。可以通过为comboBox（）调用robot（）来缓解此问题。

代替

window.comboBox().pressAndReleaseKeys(KeyEvent.VK_S);

尝试做

window.comboBox().robot().pressAndReleaseKeys(KeyEvent.VK_S);

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