Java 使用Gitlab CI和Junit测试mediaplayer

我目前正在为一个可以加载视频并播放/暂停视频的应用程序编写测试。我们使用maven作为构建框架，junit作为测试框架。测试代码如下所示：

public class UnitTest extends ApplicationTest {

  private MediaPlayer mediaPlayer1;
  @FXML
  private MediaView mediaView1;
  @FXML
  private Button playPauseButton;
  private static Media media;

  @Override
  public void start(Stage stage) throws Exception {
    try {
      Parent root = FXMLLoader.load(getClass().getResource("videoMain.fxml"));
      stage.setTitle("Vorprojekt");
      Scene scene = new Scene(root, 1300, 900);
      stage.setScene(scene);
      stage.show();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  @Before
  public void setup() throws Exception {
    try {
      media = new Media(getClass().getResource("small.mp4").toString());
      mediaPlayer1 = new MediaPlayer(media);
      mediaView1 = find("#mediaView1");
      mediaView1.setMediaPlayer(mediaPlayer1);
      playPauseButton = find("#playPauseButton");
    } catch (Exception e) {
    }
  }

  @After
  public void tearDown() {
  }

  @Test
  public void playPauseButtonTest() {
    mediaPlayer1.play();
    clickOn(playPauseButton);
    try {
      assertTrue(mediaPlayer1.getStatus().equals(Status.PAUSED));
    } catch (AssertionError ae) {
      fail("Status should be paused but is " + mediaPlayer1.getStatus());
    }

  }
}

 maven_build:
 image: tomsontom/oracle-java8-mvn
 script:
  - cd Code
  - apt-get update && apt-get upgrade -y
  - DEBIAN_FRONTEND=noninteractive apt-get install openjfx xserver-xorg-   video-dummy xinit fonts-freefont-ttf libavformat-ffmpeg56 wget libswt-gtk-3-java firefox -y
- wget https://raw.githubusercontent.com/thewtex/docker-opengl/master/etc/X11/xorg.conf -O /etc/X11/xorg.conf
- xinit -- :0 -nolisten tcp vt$XDG_VTNR -noreset +extension GLX +extension RANDR +extension RENDER +extension XFIXES &
- DISPLAY=:0 mvn --batch-mode package
- cd target && ls -la

如果我在我的设备上本地运行该测试，它运行时不会出现任何问题。但如果在Gitlab CI上运行它，则会引发以下错误：

[信息]正在运行UnitTest[错误]测试运行：1，失败：1，错误：0， 跳过：0，经过的时间：1.776秒解决方案： 有两个问题我们没有处理。首先，虚拟监视器的大小定义为1366x768，而用户界面的大小初始化为1300x900。因此，无法访问播放/暂停按钮。 第二个错误是，mediaplayer需要更多的时间在运行程序中初始化。因此，在mediaplayer初始化之后，在状态应该切换为playing之后，需要一个循环来等待mediaplayer进行切换。以下设置方法为我们解决了问题：

  @Before
  public void setup() throws Exception {
    media = new Media(getClass().getResource("small.mp4").toString());
    mediaPlayer1 = new MediaPlayer(media);
    mediaPlayer1.setOnError(() -> fail("media error" + mediaPlayer1.getError().toString()));
    int retries = 0;
    while (mediaPlayer1.getStatus() != MediaPlayer.Status.READY) {
      System.out
          .println("media player not yet READY - current status: " + mediaPlayer1.getStatus());
      sleep(100);
      retries++;
      if (retries > 10) {
        fail("waited too long for media player to get READY");
      }   
    }   
    mediaView1 = find("#mediaView1");
    mediaView1.setMediaPlayer(mediaPlayer1);
    mediaPlayer1.play();
    retries = 0;
    while (mediaPlayer1.getStatus() != MediaPlayer.Status.PLAYING) {
      System.out
          .println("media player not yet PLAYING - current status: " + mediaPlayer1.getStatus());
      sleep(100);
      retries++;
      if (retries > 10) {
        fail("waited too long for media player to get PLAYING");
      }   
    }   
  }

需要这个gitlab ci：

maven_build:
  image: tomsontom/oracle-java8-mvn
  script:
    - cd Code
    - apt-get update && apt-get upgrade -y
    - DEBIAN_FRONTEND=noninteractive apt-get install openjfx xserver-xorg-video-dummy xserver-xorg-input-void xinit fonts-freefont-ttf pulseaudio pulseaudio-utils libavformat-ffmpeg56 wget libswt-gtk-3-java firefox -y
    - wget https://xpra.org/xorg.conf -O /etc/X11/xorg.conf
    - service dbus start
    - xinit -- :0 -nolisten tcp vt$XDG_VTNR -noreset +extension GLX +extension RANDR +extension RENDER +extension XFIXES &
    - DISPLAY=:0 pulseaudio --exit-idle-time=-1 &
    - DISPLAY=:0 mvn --batch-mode package
    - cd target && ls -la 

解决方案： 有两个问题我们没有处理。首先，虚拟监视器的大小定义为1366x768，而用户界面的大小初始化为1300x900。因此，无法访问播放/暂停按钮。 第二个错误是，mediaplayer需要更多的时间在运行程序中初始化。因此，在mediaplayer初始化之后，在状态应该切换为playing之后，需要一个循环来等待mediaplayer进行切换。以下设置方法为我们解决了问题：

  @Before
  public void setup() throws Exception {
    media = new Media(getClass().getResource("small.mp4").toString());
    mediaPlayer1 = new MediaPlayer(media);
    mediaPlayer1.setOnError(() -> fail("media error" + mediaPlayer1.getError().toString()));
    int retries = 0;
    while (mediaPlayer1.getStatus() != MediaPlayer.Status.READY) {
      System.out
          .println("media player not yet READY - current status: " + mediaPlayer1.getStatus());
      sleep(100);
      retries++;
      if (retries > 10) {
        fail("waited too long for media player to get READY");
      }   
    }   
    mediaView1 = find("#mediaView1");
    mediaView1.setMediaPlayer(mediaPlayer1);
    mediaPlayer1.play();
    retries = 0;
    while (mediaPlayer1.getStatus() != MediaPlayer.Status.PLAYING) {
      System.out
          .println("media player not yet PLAYING - current status: " + mediaPlayer1.getStatus());
      sleep(100);
      retries++;
      if (retries > 10) {
        fail("waited too long for media player to get PLAYING");
      }   
    }   
  }

需要这个gitlab ci：

maven_build:
  image: tomsontom/oracle-java8-mvn
  script:
    - cd Code
    - apt-get update && apt-get upgrade -y
    - DEBIAN_FRONTEND=noninteractive apt-get install openjfx xserver-xorg-video-dummy xserver-xorg-input-void xinit fonts-freefont-ttf pulseaudio pulseaudio-utils libavformat-ffmpeg56 wget libswt-gtk-3-java firefox -y
    - wget https://xpra.org/xorg.conf -O /etc/X11/xorg.conf
    - service dbus start
    - xinit -- :0 -nolisten tcp vt$XDG_VTNR -noreset +extension GLX +extension RANDR +extension RENDER +extension XFIXES &
    - DISPLAY=:0 pulseaudio --exit-idle-time=-1 &
    - DISPLAY=:0 mvn --batch-mode package
    - cd target && ls -la