测试拖放文件到应用程序

Question

我正在寻找一种方法,通过单元测试将文件/多个文件拖放到我的应用程序中.例如,在Windows资源管理器中选择一些文件,将它们拖放到我的应用程序中.

我能够在我的应用程序中测试两个组件之间的拖放行为(见下文 - 随意指出你是否知道更好的方法),但我不知道如何在数据必须来自时做同样的事情在我的申请之外.

Transferable当我手动执行拖放操作时,我想过使用调试器来检查'文件' ,但是必须有更好的方法然后硬编码完整Transferable.

组件之间的拖放测试示例

import org.junit.Test;

import javax.swing.Action;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
import java.awt.event.ActionEvent;

import static org.junit.Assert.assertEquals;

public class DragAndDropTest {
  @Test
  public void dragAndDropBetweenTwoTextFields() {
    JTextField firstField = new JTextField();
    JTextField secondField = new JTextField();
    String testText = "Test text";
    firstField.setText( testText );
    firstField.selectAll();
    Action copyAction = TransferHandler.getCopyAction();
    copyAction.actionPerformed( new ActionEvent( firstField, ActionEvent.ACTION_PERFORMED, "Copy" ) );
    Action pasteAction = TransferHandler.getPasteAction();
    pasteAction.actionPerformed( new ActionEvent( secondField, ActionEvent.ACTION_PERFORMED, "Paste" ) );
    assertEquals( "Text is not copied", testText, secondField.getText() );
  }
}

编辑

根据这个问题下的评论,我已经通过提供硬编码将我的代码片段更新为"伪造"拖放Transferable.该代码还包含一个主程序,它只是创建一个空框架,您可以在其上删除文件.然后路径将打印在控制台上.

在我的电脑上,拖放文件不会使用javaFileListFlavorURI风格.以前的经验(参见这个问题)已经告诉我,Transferable当从Java应用程序外部拖动某些东西时,a组件可能会以微妙的方式有所不同.

所以要完全清楚:我想测试我的代码中从提取的信息中提取信息的部分Transferable."信息处理"代码(例如,当应用程序接收文件时会发生什么)可以轻松地进行测试,而不必费心去做D&D.我只需要确保从中提取正确的信息Transferable,用硬编码测试它是愚蠢的Transferable.

import org.junit.Test;

import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.TransferHandler;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.IOException;
import java.util.List;

import static org.junit.Assert.assertEquals;

public class DragAndDropTest {
  private static DataFlavor URI_LIST_FLAVOR = null;
  static {
    try {
      URI_LIST_FLAVOR = new DataFlavor( "text/uri-list;class=java.lang.String" );
    }
    catch ( ClassNotFoundException ignore ) {
    }
  }

  @Test
  public void testFileDragAndDrop() throws IOException, UnsupportedFlavorException {
    JComponent testComponent = new JPanel();
    TestingTransferHandler transferHandler = new TestingTransferHandler();
    testComponent.setTransferHandler( transferHandler );
    Clipboard clipBoard = new JLabel(  ).getToolkit().getSystemClipboard();
    Transferable transferable = new Transferable() {
      @Override
      public DataFlavor[] getTransferDataFlavors() {
        return new DataFlavor[]{URI_LIST_FLAVOR};
      }

      @Override
      public boolean isDataFlavorSupported( DataFlavor flavor ) {
        return flavor == URI_LIST_FLAVOR;
      }

      @Override
      public Object getTransferData( DataFlavor flavor ) throws UnsupportedFlavorException, IOException {
        if ( flavor == URI_LIST_FLAVOR ) {
          return new String( "file:///home/robins/Desktop/swingx-1.0-javadoc.jar" );
        }
        throw new UnsupportedFlavorException( flavor );
      }
    };
    clipBoard.setContents( transferable, null );
    Action pasteAction = TransferHandler.getPasteAction();
    pasteAction.actionPerformed( new ActionEvent( testComponent, ActionEvent.ACTION_PERFORMED, "Paste" ) );
    assertEquals( transferable.getTransferData( URI_LIST_FLAVOR ), transferHandler.transferable.getTransferData( URI_LIST_FLAVOR ) );
  }

  private static class TestingTransferHandler extends TransferHandler{
    public Transferable transferable;
    @Override
    public boolean canImport( TransferSupport support ) {
      return true;
    }
    @Override
    public boolean importData( TransferSupport support ) {
      transferable = support.getTransferable();
      try{
        if ( transferable.isDataFlavorSupported( DataFlavor.javaFileListFlavor ) ) {
          System.out.println("File list flavor");
          List<File> fileList = ( List<File> ) transferable.getTransferData( DataFlavor.javaFileListFlavor );
          System.out.println( "fileList = " + fileList );
        }
        if ( transferable.isDataFlavorSupported( URI_LIST_FLAVOR )){
          System.out.println("URI list flavor");
          String uriList = ( String ) transferable.getTransferData( URI_LIST_FLAVOR );
          System.out.println( "uriList = " + uriList );
        }
        return true;
      } catch ( UnsupportedFlavorException e ) {
        return false;
      } catch ( IOException e ) {
        return false;
      }
    }
  }

  public static void main( String[] args ) {
    EventQueue.invokeLater( new Runnable() {
      @Override
      public void run() {
        JFrame frame = new JFrame( "TestFrame" );
        JPanel contentPane = new JPanel( new BorderLayout(  ) );
        contentPane.setTransferHandler( new TestingTransferHandler() );
        frame.setContentPane( contentPane );
        frame.setSize( 200,200 );
        frame.setVisible( true );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      }
    } );
  }
}

Answer 1

如果你不限于单元测试，你可以尝试编写GUI测试。Swing 有多个框架，请参阅此线程 - Unit testing Framework for a Swing UI

几年前我已经使用过jemmy一段时间了，如果测试很简单的话就还可以