FYI: New TransferHandler test

[Roman Kennke <roman dot kennke at aicas dot com>]

This tests the method TransferHandler.createTransferable().

2006-10-17  Roman Kennke <kennke@aicas.com>

	* gnu/testlet/javax/swing/TransferHandler/createTransferable.java:
	New test.

/Roman

Index: gnu/testlet/javax/swing/TransferHandler/createTransferable.java
===================================================================
RCS file: gnu/testlet/javax/swing/TransferHandler/createTransferable.java
diff -N gnu/testlet/javax/swing/TransferHandler/createTransferable.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gnu/testlet/javax/swing/TransferHandler/createTransferable.java	17 Oct 2006 15:22:14 -0000
@@ -0,0 +1,246 @@
+/* createTransferable.java -- Tests TransferHandler.createTransferable()
+   Copyright (C) 2006 Roman Kennke (kennke@aicas.com)
+This file is part of Mauve.
+
+Mauve is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+Mauve is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Mauve; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+*/
+
+// Tags: JDK1.4
+
+package gnu.testlet.javax.swing.TransferHandler;
+
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.IOException;
+
+import javax.swing.JComponent;
+import javax.swing.TransferHandler;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests the TransferHandler.createTransferable() method.
+ */
+public class createTransferable extends TestCase
+{
+
+  /**
+   * Overridden to make createTransferable() public for testing.
+   */
+  private class TestTransferHandler extends TransferHandler
+  {
+    TestTransferHandler(String prop)
+    {
+      super(prop);
+    }
+    public Transferable createTransferable(JComponent comp)
+    {
+      return super.createTransferable(comp);
+    }
+  }
+
+  public class TestComponent
+    extends JComponent
+  {
+    private String value;
+    public void setTestProperty(String val)
+    {
+      value = val;
+    }
+    public String getTestProperty()
+    {
+      return "HelloWorld";
+    }
+  }
+
+  /**
+   * The transfer handler that we test.
+   */
+  private TestTransferHandler transferHandler;
+
+  /**
+   * The component that is passed in the createTransferable() method.
+   */
+  private JComponent component;
+
+  public void setUp()
+  {
+    component = new TestComponent();
+    transferHandler = new TestTransferHandler("testProperty");
+  }
+
+  public void tearDown()
+  {
+    component = null;
+    transferHandler = null;
+  }
+
+  /**
+   * Check what is returned when we initialize the TransferHandler with a
+   * null property.
+   */
+  public void testNullProperty()
+  {
+    transferHandler = new TestTransferHandler(null);
+    Transferable transferable = transferHandler.createTransferable(component);
+    assertNull(transferable);
+  }
+
+  public void testMissingGetter()
+  {
+    component = new JComponent()
+    {
+      String value;
+      public void setTestProperty(String val)
+      {
+        value = val;
+      }
+    };
+    Transferable transferable = transferHandler.createTransferable(component);
+    assertNull(transferable);
+  }
+
+  public void testMissingSetter()
+  {
+    component = new JComponent()
+    {
+      String value;
+      public String getTestProperty()
+      {
+        return value;
+      }
+    };
+    Transferable transferable = transferHandler.createTransferable(component);
+    assertNotNull(transferable);
+  }
+
+  public void testAllOk()
+  {
+    Transferable transferable = transferHandler.createTransferable(component);
+    assertNotNull(transferable);
+  }
+
+  /**
+   * Tests which transfer flavors are supported by the created Transferable.
+   */
+  public void testTransferableTransferFlavors()
+  {
+    Transferable transferable = transferHandler.createTransferable(component);
+    DataFlavor[] flavors = transferable.getTransferDataFlavors();
+    assertEquals(1, flavors.length);
+    assertEquals("application/x-java-jvm-local-objectref; class=java.lang.String", flavors[0].getMimeType());
+  }
+
+  public void testTransferableDataFlavorSupported()
+  {
+    Transferable transferable = transferHandler.createTransferable(component);
+    try
+      {
+        // Primary type doesn't match.
+        DataFlavor flavor = new DataFlavor("xyz/x-java-jvm-local-objectref; class=java.lang.String");
+        assertFalse(transferable.isDataFlavorSupported(flavor));
+        // Subtype type doesn't match.
+        flavor = new DataFlavor("application/x-java-remote-object; class=java.lang.String");
+        assertFalse(transferable.isDataFlavorSupported(flavor));
+        // Representation class doesn't match.
+        flavor = new DataFlavor("application/x-java-jvm-local-objectref; class=java.lang.Integer");
+        assertFalse(transferable.isDataFlavorSupported(flavor));
+                    
+        // Good match.
+        flavor = new DataFlavor("application/x-java-jvm-local-objectref; class=java.lang.String");
+        assertTrue(transferable.isDataFlavorSupported(flavor));
+      }
+    catch (ClassNotFoundException ex)
+      {
+        fail(ex.getMessage());
+      }
+  }
+
+  public void testTransferableTransferData()
+  {
+    Transferable transferable = transferHandler.createTransferable(component);
+    // Try invalid data flavor.
+    try
+      {
+        DataFlavor flavor = new DataFlavor("xyz/x-java-jvm-local-objectref; class=java.lang.String");
+        Object data = transferable.getTransferData(flavor);
+        fail("UnsupportedOperationException must be thrown");
+      }
+    catch (UnsupportedFlavorException ex)
+      {
+        // Ok.
+      }
+    catch (IOException ex)
+      {
+        fail("UnsupportedFlavorException must be thrown, no IOException");
+      }
+    catch (ClassNotFoundException ex)
+      {
+        fail(ex.getMessage());
+      }
+
+    // Try OK data flavor.
+    try
+      {
+        DataFlavor flavor = new DataFlavor("application/x-java-jvm-local-objectref; class=java.lang.String");
+        Object data = transferable.getTransferData(flavor);
+        assertEquals(data, "HelloWorld");
+      }
+    catch (UnsupportedFlavorException ex)
+      {
+        fail("UnsupportedFlavorException must not be thrown");
+      }
+    catch (IOException ex)
+      {
+        System.err.println(ex.getMessage());
+        fail("IOException must not be thrown");
+      }
+    catch (ClassNotFoundException ex)
+      {
+        fail(ex.getMessage());
+      }
+    // Try non-accessible component.
+    component = new JComponent()
+      {
+        public String getTestProperty()
+        {
+          return "Hello World";
+        }
+      };
+    transferable = transferHandler.createTransferable(component);
+
+    try
+      {
+        DataFlavor flavor = new DataFlavor("application/x-java-jvm-local-objectref; class=java.lang.String");
+        Object data = transferable.getTransferData(flavor);
+        fail("IOException must be thrown");
+      }
+    catch (UnsupportedFlavorException ex)
+      {
+        fail("UnsupportedFlavorException must not be thrown");
+      }
+    catch (IOException ex)
+      {
+        // Ok.
+      }
+    catch (ClassNotFoundException ex)
+      {
+        fail(ex.getMessage());
+      }
+  }
+}