tests/org.eclipse.rap.rwt.test/src/org/eclipse/swt/widgets/Control_Test.java

/*******************************************************************************
 * Copyright (c) 2009, 2019 Innoopract Informationssysteme GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Innoopract Informationssysteme GmbH - initial API and implementation
 *    EclipseSource - ongoing development
 ******************************************************************************/
package org.eclipse.swt.widgets;

import static java.util.Arrays.asList;
import static org.eclipse.rap.rwt.testfixture.internal.TestUtil.createImage;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.rap.rwt.RWT;
import org.eclipse.rap.rwt.internal.lifecycle.RemoteAdapter;
import org.eclipse.rap.rwt.internal.lifecycle.ReparentedControls;
import org.eclipse.rap.rwt.internal.lifecycle.WidgetLCA;
import org.eclipse.rap.rwt.internal.theme.ThemeAdapter;
import org.eclipse.rap.rwt.internal.theme.ThemeTestUtil;
import org.eclipse.rap.rwt.testfixture.TestContext;
import org.eclipse.rap.rwt.testfixture.internal.Fixture;
import org.eclipse.rap.rwt.theme.BoxDimensions;
import org.eclipse.rap.rwt.theme.ControlThemeAdapter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.events.DragDetectListener;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.HelpListener;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.MenuDetectListener;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.internal.widgets.ControlRemoteAdapter;
import org.eclipse.swt.internal.widgets.ControlUtil;
import org.eclipse.swt.internal.widgets.IControlAdapter;
import org.eclipse.swt.internal.widgets.IShellAdapter;
import org.eclipse.swt.internal.widgets.MarkupValidator;
import org.eclipse.swt.layout.FillLayout;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;


@SuppressWarnings( "deprecation" )
public class Control_Test {

  @Rule
  public TestContext context = new TestContext();

  private Display display;
  private Shell shell;

  @Before
  public void setUp() {
    display = new Display();
    shell = new Shell( display );
  }

  @Test
  public void testCreate() {
    Control control = new Button( shell, SWT.NONE );

    assertSame( shell, control.getParent() );
    assertSame( display, control.getDisplay() );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testCreate_failsWithNullParent() {
    new Button( null, SWT.NONE );
  }

  @Test
  public void testGetAdapterWithControlAdapter() {
    Control control = new Button( shell, SWT.NONE );
    Object adapter = control.getAdapter( IControlAdapter.class );
    assertNotNull( adapter );
  }

  @Test
  public void testGetAdapterWithControlThemeAdapter() {
    Control control = new Button( shell, SWT.NONE );
    Object controlThemeAdapter = control.getAdapter( ControlThemeAdapter.class );
    Object themeAdapter = control.getAdapter( ThemeAdapter.class );
    assertNotNull( controlThemeAdapter );
    assertSame( controlThemeAdapter, themeAdapter );
  }

  @Test
  public void testStyle() {
    Control control = new Button( shell, SWT.NONE );
    assertTrue( ( control.getStyle() & SWT.LEFT_TO_RIGHT ) != 0 );
    control = new Button( shell, SWT.BORDER );
    assertTrue( ( control.getStyle() & SWT.LEFT_TO_RIGHT ) != 0 );
  }

  @Test
  public void testBounds() {
    Control control = new Button( shell, SWT.PUSH );
    Rectangle controlBounds = control.getBounds();
    Rectangle expected = new Rectangle( 0, 0, 0, 0 );
    assertEquals( expected, controlBounds );
    Rectangle newBounds = new Rectangle( 10, 20, 30, 40 );
    control.setBounds( newBounds );
    controlBounds = control.getBounds();
    expected = new Rectangle( 10, 20, 30, 40 );
    assertEquals( expected, controlBounds );
    assertNotSame( newBounds, controlBounds );
    assertNotSame( controlBounds, control.getBounds() );
    newBounds.x = 100;
    controlBounds = control.getBounds();
    expected = new Rectangle( 10, 20, 30, 40 );
    assertEquals( expected, controlBounds );
    control.setBounds( 5, 6, 7, 8 );
    controlBounds = control.getBounds();
    expected = new Rectangle( 5, 6, 7, 8 );
    assertEquals( expected, controlBounds );
    control.setLocation( 11, 12 );
    control.setSize( 13, 14 );
    controlBounds = control.getBounds();
    expected = new Rectangle( 11, 12, 13, 14 );
    assertEquals( expected, controlBounds );
    try {
      control.setBounds( null );
      fail( "Rectangle parameter must not be null." );
    } catch( IllegalArgumentException iae ) {
      // expected
    }
    control.setBounds( 0, 0, -1, -1 );
    assertEquals( new Rectangle( 0, 0, 0, 0 ), control.getBounds() );
  }

  @Test
  public void testLocation() {
    Control control = new Button( shell, SWT.PUSH );
    Point expectedLocation = new Point( 10, 20 );
    control.setLocation( expectedLocation );
    Rectangle controlBounds = control.getBounds();
    Rectangle expectedBounds = new Rectangle( 10, 20, 0, 0 );
    assertEquals( expectedBounds, controlBounds );
    Point controlLocation = control.getLocation();
    assertEquals( expectedLocation, controlLocation );
    assertNotSame( expectedLocation, controlLocation );
    expectedLocation.x = 15;
    controlLocation = control.getLocation();
    assertEquals( new Point( 10, 20 ), controlLocation );
    try {
      control.setLocation( null );
      fail( "Point parameter must not be null." );
    } catch( IllegalArgumentException iae ) {
      // expected
    }
  }

  @Test
  public void testSize() {
    Control control = new Button( shell, SWT.PUSH );
    Point expectedSize = new Point( 10, 20 );
    control.setSize( expectedSize );
    Rectangle controlBounds = control.getBounds();
    Rectangle expectedBounds = new Rectangle( 0, 0, 10, 20 );
    assertEquals( expectedBounds, controlBounds );
    Point controlSize = control.getSize();
    assertEquals( expectedSize, controlSize );
    assertNotSame( expectedSize, controlSize );
    expectedSize.x = 15;
    controlSize = control.getSize();
    assertEquals( new Point( 10, 20 ), controlSize );
    try {
      control.setSize( null );
      fail( "Point parameter must not be null." );
    } catch( IllegalArgumentException iae ) {
      // expected
    }
    control.setSize( -2, -2 );
    assertEquals( new Point( 0, 0 ), control.getSize() );
  }

  @Test
  public void testGetShell() {
    Button button1 = new Button( shell, SWT.PUSH );
    Composite shell2 = new Shell( display, SWT.NONE );
    Button button2 = new Button( shell2, SWT.PUSH );
    assertSame( shell, shell.getShell() );
    assertSame( shell, button1.getShell() );
    assertSame( shell2, shell2.getShell() );
    assertSame( shell2, button2.getShell() );
    assertNotSame( shell2, shell.getShell() );
    assertNotSame( shell2, button1.getShell() );
  }

  @Test
  public void testToolTipText() {
    Control control1 = new Button( shell, SWT.PUSH );
    control1.setToolTipText( null );
    assertEquals( null, control1.getToolTipText() );
    control1.setToolTipText( "" );
    assertEquals( "", control1.getToolTipText() );
    control1.setToolTipText( "xyz" );
    assertEquals( "xyz", control1.getToolTipText() );
    Control control2 = new Button( shell, SWT.PUSH );
    assertEquals( null, control2.getToolTipText() );
  }

  @Test
  public void testMenu() {
    Control control = new Button( shell, SWT.PUSH );
    Menu menu = new Menu( control );
    control.setMenu( menu );
    assertSame( menu, control.getMenu() );
    menu.dispose();
    try {
      control.setMenu( menu );
      fail( "Must not allow to set dipsosed of menu" );
    } catch( IllegalArgumentException e ) {
      // expected
    }
    Shell anotherShell = new Shell( display , SWT.NONE );
    menu = new Menu( anotherShell, SWT.POP_UP );
    try {
      control.setMenu( menu );
      fail( "Must not allow to set menu from different shell" );
    } catch( IllegalArgumentException e ) {
      // expected
    }
    menu = new Menu( shell, SWT.BAR );
    try {
      control.setMenu( menu );
      fail( "Menu to be set must have style SWT.POP_UP" );
    } catch( RuntimeException e ) {
      // expected
    }
    menu = new Menu( shell, SWT.POP_UP );
    control.setMenu( menu );
    menu.dispose();
    assertEquals( null, control.getMenu() );
  }

  @Test
  public void testInitialTabIndex() {
    Control control = new Button( shell, SWT.PUSH );

    IControlAdapter adapter = ControlUtil.getControlAdapter( control );

    assertEquals( -1, adapter.getTabIndex() );
  }

  @Test
  public void testSetTabIndex_onControl() {
    Control control = new Button( shell, SWT.PUSH );

    IControlAdapter adapter = ControlUtil.getControlAdapter( control );
    adapter.setTabIndex( 5 );

    assertEquals( 5, adapter.getTabIndex() );
  }

  @Test
  public void testSetTabIndex_onScrolledComposite() {
    Control control = new ScrolledComposite( shell, SWT.NONE );

    IControlAdapter adapter = ControlUtil.getControlAdapter( control );
    adapter.setTabIndex( 5 );

    assertEquals( -1, adapter.getTabIndex() );
  }

  @Test
  public void testSetTabIndex_onComposite() {
    Control control = new Composite( shell, SWT.NONE );

    IControlAdapter adapter = ControlUtil.getControlAdapter( control );
    adapter.setTabIndex( 5 );

    assertEquals( -1, adapter.getTabIndex() );
  }

  @Test
  public void testSetTabIndex_onSashForm() {
    Control control = new SashForm( shell, SWT.NONE );

    IControlAdapter adapter = ControlUtil.getControlAdapter( control );
    adapter.setTabIndex( 5 );

    assertEquals( -1, adapter.getTabIndex() );
  }

  @Test
  public void testDispose() {
    Control control = new Button( shell, SWT.PUSH );

    control.dispose();

    assertTrue( control.isDisposed() );
  }

  @Test
  public void testDispose_triggersDisposeEvent() {
    Control control = new Button( shell, SWT.PUSH );
    Listener listener = mock( Listener.class );
    control.addListener( SWT.Dispose, listener );

    control.dispose();

    verify( listener ).handleEvent( any( Event.class ) );
  }

  @Test
  public void testDisposeTwice_doesNotTriggerAnotherDisposeEvent() {
    Control control = new Button( shell, SWT.PUSH );
    Listener listener = mock( Listener.class );
    control.addListener( SWT.Dispose, listener );

    control.dispose();
    control.dispose();

    verify( listener, times( 1 ) ).handleEvent( any( Event.class ) );
  }

  @Test
  public void testDispose_removesFromParent() {
    Control control = new Button( shell, SWT.PUSH );

    control.dispose();

    assertFalse( asList( shell.getChildren() ).contains( control ) );
  }

  @Test
  public void testDisposeWithMenu() {
    Control control = new Button( shell, SWT.PUSH );
    Menu menu = new Menu( control );
    control.setMenu( menu );
    control.dispose();
    assertTrue( menu.isDisposed() );
    Control controlA = new Button( shell, SWT.PUSH );
    Control controlB = new Button( shell, SWT.PUSH );
    menu = new Menu( shell, SWT.POP_UP );
    controlA.setMenu( menu );
    controlB.setMenu( menu );
    controlA.dispose();
    assertTrue( menu.isDisposed() );
  }

  @Test
  public void testFont() {
    Composite composite = new Composite( shell, SWT.NONE );
    Control control = new Button( composite, SWT.PUSH );

    // Initially the system font is set
    assertSame( display.getSystemFont(), control.getFont() );

    // Setting a parents' font must not affect the childrens font
    Font compositeFont = new Font( display, "Composite Font", 12, SWT.NORMAL );
    composite.setFont( compositeFont );
    assertNotSame( control.getFont(), compositeFont );

    // (re)setting a font to null assigns the system font to the control
    Label label = new Label( composite, SWT.NONE );
    Font labelFont = new Font( display, "label font", 14, SWT.BOLD );
    label.setFont( labelFont );
    assertSame( labelFont, label.getFont() );
    label.setFont( null );
    assertSame( display.getSystemFont(), label.getFont() );
  }

  /*
   * In SWT, it is not allowed to dispose of a resource that is in use. (see bug 342943)
   * Though, SWT does not immediately 'react' when disposing of a resource that is in use.
   * This test mimics the behaviour on Windows.
   */
  @Test
  public void testGetFontAfterDisposingFont() {
    Control control = new Label( shell, SWT.NONE );
    Font font = new Font( display, "font-name", 10, SWT.NONE );
    control.setFont( font );
    font.dispose();
    Font returnedFont = control.getFont();
    assertSame( font, returnedFont );
  }

  @Test
  public void testForeground() {
    Composite comp = new Composite( shell, SWT.NONE );
    Control control = new Label( comp, SWT.PUSH );

    // Initially the system widget foreground color is set
    assertSame( display.getSystemColor( SWT.COLOR_WIDGET_FOREGROUND ),
                control.getForeground() );

    // Setting a parents' color must not affect the children's color
    comp.setForeground( display.getSystemColor( SWT.COLOR_RED ) );
    assertNotSame( display.getSystemColor( SWT.COLOR_RED ),
                   control.getForeground() );

    // setting the foreground changes the state persistently
    control.setForeground( display.getSystemColor( SWT.COLOR_BLUE ) );
    assertSame( display.getSystemColor( SWT.COLOR_BLUE ),
                control.getForeground() );

    // (re)setting the foreground to null assigns the system color again
    control.setForeground( null );
    assertSame( display.getSystemColor( SWT.COLOR_WIDGET_FOREGROUND ),
                control.getForeground() );
  }

  @Test
  public void testBackground() {
    Composite comp = new Composite( shell, SWT.NONE );
    Control control = new Label( comp, SWT.PUSH );

    // Initially the system widget background color is set
    assertSame( display.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND ),
                control.getBackground() );

    // Setting a parents' color must not affect the children's color
    comp.setBackground( display.getSystemColor( SWT.COLOR_RED ) );
    assertNotSame( display.getSystemColor( SWT.COLOR_RED ),
                   control.getBackground() );

    // setting the background changes the state persistently
    control.setBackground( display.getSystemColor( SWT.COLOR_BLUE ) );
    assertSame( display.getSystemColor( SWT.COLOR_BLUE ),
                control.getBackground() );

    // (re)setting the background to null assigns the system color again
    control.setBackground( null );
    assertSame( display.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND ),
                control.getBackground() );
  }

  @Test
  public void testBackgroundMode() throws IOException {
    Color red = display.getSystemColor( SWT.COLOR_RED );
    Color blue = display.getSystemColor( SWT.COLOR_BLUE );
    Color widgetBg = display.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND );
    Image image = createImage( display, Fixture.IMAGE1 );
    Composite comp = new Composite( shell, SWT.NONE );
    Control control = new Label( comp, SWT.NONE );

    // no inheritance by default
    comp.setBackground( red );
    assertEquals( widgetBg, control.getBackground() );

    // inherited background
    comp.setBackgroundMode( SWT.INHERIT_DEFAULT );
    assertEquals( red, control.getBackground() );

    // newly created control also inherits background mode
    Control control2 = new Label( comp, SWT.NONE );
    assertEquals( red, control2.getBackground() );

    // no inheritance when bg image is set
    control.setBackgroundImage( image );
    assertEquals( widgetBg, control.getBackground() );

    // inherited background again
    control.setBackgroundImage( null );
    assertEquals( red, control.getBackground() );

    // no inheritance when bg color is set
    control.setBackground( blue );
    assertEquals( blue, control.getBackground() );
  }

  @Test
  public void testBackgroundModeMultiLevel() {
    Color red = display.getSystemColor( SWT.COLOR_RED );
    Color blue = display.getSystemColor( SWT.COLOR_BLUE );
    Composite comp = new Composite( shell, SWT.NONE );
    Label label = new Label( comp, SWT.NONE );

    // label inherits background from shell
    shell.setBackground( red );
    shell.setBackgroundMode( SWT.INHERIT_DEFAULT );
    comp.setBackgroundMode( SWT.INHERIT_DEFAULT );
    assertEquals( red, label.getBackground() );

    // label inherits background from comp
    comp.setBackground( blue );
    assertEquals( blue, label.getBackground() );
  }

  @Test
  public void testBackgroundTransparency() throws IOException {
    Composite comp = new Composite( shell, SWT.NONE );
    Color blue = display.getSystemColor( SWT.COLOR_BLUE );
    comp.setBackground( blue );
    Image image = createImage( display, Fixture.IMAGE1 );
    comp.setBackgroundImage( image );
    Control control = new Label( comp, SWT.NONE );
    IControlAdapter adapter = ControlUtil.getControlAdapter( control );

    // initial state
    assertNull( adapter.getUserBackground() );
    assertNull( adapter.getUserBackgroundImage() );
    assertFalse( adapter.getBackgroundTransparency() );

    // set background mode on parent enables transparency
    comp.setBackgroundMode( SWT.INHERIT_DEFAULT );
    assertSame( blue, control.getBackground() );
    assertSame( image, control.getBackgroundImage() );
    assertNull( adapter.getUserBackground() );
    assertNull( adapter.getUserBackgroundImage() );
    assertTrue( adapter.getBackgroundTransparency() );

    // controls created after set background mode are also transparent
    Control control2 = new Label( comp, SWT.NONE );
    IControlAdapter adapter2 = ControlUtil.getControlAdapter( control2 );
    assertSame( blue, control.getBackground() );
    assertSame( image, control.getBackgroundImage() );
    assertNull( adapter2.getUserBackground() );
    assertNull( adapter2.getUserBackgroundImage() );
    assertTrue( adapter2.getBackgroundTransparency() );

    // set color on control overrides transparency
    Color red = display.getSystemColor( SWT.COLOR_RED );
    control.setBackground( red );
    assertSame( red, control.getBackground() );
    assertNull( control.getBackgroundImage() );
    assertEquals( red, adapter.getUserBackground() );
    assertFalse( adapter.getBackgroundTransparency() );
  }

  @Test
  public void testEnabled() {
    Composite composite = new Composite( shell, SWT.NONE );
    Control control = new Button( composite, SWT.PUSH );

    // Must be enabled, initially
    assertTrue( control.getEnabled() );
    assertTrue( control.isEnabled() );

    // Must react on setEnabled()
    control.setEnabled( false );
    assertFalse( control.getEnabled() );
    assertFalse( control.isEnabled() );

    // Test the difference between is- and getEnabled
    control.setEnabled( true );
    composite.setEnabled( false );
    assertFalse( composite.getEnabled() );
    assertFalse( composite.isEnabled() );
    assertTrue( control.getEnabled() );
    assertFalse( control.isEnabled() );
  }

  @Test
  public void testUserForeground() {
    Composite composite = new Composite( shell, SWT.NONE );
    Control control = new Label( composite, SWT.NONE );
    Color blue = display.getSystemColor( SWT.COLOR_BLUE );
    IControlAdapter adapter = ControlUtil.getControlAdapter( control );
    assertNull( adapter.getUserForeground() );
    Color themeColor = control.getForeground();

    control.setForeground( blue );
    assertEquals( blue, adapter.getUserForeground() );
    assertEquals( blue, control.getForeground() );

    control.setForeground( null );
    assertEquals( null, adapter.getUserForeground() );
    assertEquals( themeColor, control.getForeground() );
  }

  @Test
  public void testVisible() {
    Composite composite = new Composite( shell, SWT.NONE );
    Control control = new Button( composite, SWT.PUSH );
    shell.open();

    // Must be enabled, initially
    assertTrue( control.getVisible() );
    assertTrue( control.isVisible() );

    // Must react on setEnabled()
    control.setVisible( false );
    assertFalse( control.getVisible() );
    assertFalse( control.isVisible() );

    // Test the difference between is- and getEnabled
    control.setVisible( true );
    composite.setVisible( false );
    assertFalse( composite.getVisible() );
    assertFalse( composite.isVisible() );
    assertTrue( control.getVisible() );
    assertFalse( control.isVisible() );
  }

  @Test
  public void testSetVisibleSendsShowEvent() {
    Control control = new Button( shell, SWT.PUSH );
    control.setVisible( false );
    Listener listener = mock( Listener.class );
    control.addListener( SWT.Show, listener );

    control.setVisible( true );

    verify( listener ).handleEvent( any( Event.class ) );
  }

  @Test
  public void testSetVisibleOnVisibleControl() {
    Control control = new Button( shell, SWT.PUSH );
    Listener listener = mock( Listener.class );
    control.addListener( SWT.Show, listener );

    control.setVisible( true );

    verify( listener, never() ).handleEvent( any( Event.class ) );
  }

  @Test
  public void testSetVisibleSendsHideEvent() {
    Control control = new Button( shell, SWT.PUSH );
    Listener listener = mock( Listener.class );
    control.addListener( SWT.Hide, listener );

    control.setVisible( false );

    verify( listener ).handleEvent( any( Event.class ) );
  }

  @Test
  public void testZOrder() {
    Control control1 = new Button( shell, SWT.PUSH );
    Control control2 = new Button( shell, SWT.PUSH );
    Control control3 = new Button( shell, SWT.PUSH );
    assertEquals( 0, indexOf( shell, control1 ) );
    assertEquals( 1, indexOf( shell, control2 ) );
    assertEquals( 2, indexOf( shell, control3 ) );
    control3.moveAbove( control2 );
    assertEquals( 0, indexOf( shell, control1 ) );
    assertEquals( 1, indexOf( shell, control3 ) );
    assertEquals( 2, indexOf( shell, control2 ) );
    control1.moveBelow( control3 );
    assertEquals( 0, indexOf( shell, control3 ) );
    assertEquals( 1, indexOf( shell, control1 ) );
    assertEquals( 2, indexOf( shell, control2 ) );
    control2.moveAbove( null );
    assertEquals( 0, indexOf( shell, control2 ) );
    assertEquals( 1, indexOf( shell, control3 ) );
    assertEquals( 2, indexOf( shell, control1 ) );
    control2.moveBelow( null );
    assertEquals( 0, indexOf( shell, control3 ) );
    assertEquals( 1, indexOf( shell, control1 ) );
    assertEquals( 2, indexOf( shell, control2 ) );
    // control is already at the top / bottom
    control3.moveAbove( null );
    assertEquals( 0, indexOf( shell, control3 ) );
    control2.moveBelow( null );
    assertEquals( 0, indexOf( shell, control3 ) );
    // try to move control above / below itself
    control1.moveAbove( control1 );
    assertEquals( 1, indexOf( shell, control1 ) );
    control1.moveBelow( control1 );
    assertEquals( 1, indexOf( shell, control1 ) );
    shell.dispose();
  }

  private int indexOf( Composite parent, Control control ) {
    return asList(parent.getChildren()).indexOf( control );
  }

  @Test
  public void testFocus() {
    Control control1 = new Button( shell, SWT.PUSH );
    // When shell is closed, creating a control does not affect its focus
    assertSame( null, display.getFocusControl() );
    // When no focus was set, the first control is forceFocus'ed
    shell.open();
    assertSame( control1, display.getFocusControl() );
    assertTrue( control1.isFocusControl() );
  }

  @Test
  public void testFocusOnClosedShell() {
    Control control1 = new Button( shell, SWT.PUSH );
    final Control control2 = new Button( shell, SWT.PUSH );
    final StringBuilder log = new StringBuilder();
    FocusListener focusListener = new FocusListener() {
      @Override
      public void focusGained( FocusEvent event ) {
        if( event.getSource() == shell ) {
          log.append( "shell.focusGained|" );
        } else if( event.getSource() == control2 ) {
          log.append( "control2.focusGained|" );
        } else {
          fail( "Unexpected event: focusGained" );
        }
      }
      @Override
      public void focusLost( FocusEvent event ) {
        if( event.getSource() == shell ) {
          log.append( "shell.focusLost|" );
        } else if( event.getSource() == control2 ) {
          log.append( "control2.focusLost|" );
        } else {
          fail( "Unexpected event: focusLost" );
        }
      }
    };
    shell.addFocusListener( focusListener );
    control2.addFocusListener( focusListener );
    // focus control on closed shell, returns false
    boolean result = control2.forceFocus();
    assertFalse( result );
    assertNotSame( control2, display.getFocusControl() );
    // ...but will set the focus once the shell is opened
    shell.open();
    assertSame( control2, display.getFocusControl() );
    assertFalse( control1.isFocusControl() );
    assertTrue( control2.isFocusControl() );
    assertEquals( "shell.focusGained|shell.focusLost|control2.focusGained|",
                  log.toString() );
  }

  @Test
  public void testNoFocusControls() {
    Control control = new Button( shell, SWT.NONE );
    control.forceFocus();
    Control noFocusControl = new Label( shell, SWT.NONE );
    shell.open();
    // calling setFocus on controls with NO_FOCUS bit has no effect
    boolean result = noFocusControl.setFocus();
    assertFalse( result );
    assertFalse( noFocusControl.isFocusControl() );
    // ... but calling forceFocus marks even the NO_FOCUS control as focused
    result = noFocusControl.forceFocus();
    assertTrue( result );
    assertTrue( noFocusControl.isFocusControl() );
  }

  @Test
  public void testDisableOfFocused() {
    Control control = new Button( shell, SWT.PUSH );
    shell.open();
    control.setFocus();

    control.setEnabled( false );

    assertSame( shell, display.getFocusControl() );
  }

  @Test
  public void testDisposeOfFocused() {
    Control control1 = new Button( shell, SWT.PUSH );
    Composite composite = new Composite( shell, SWT.NONE );
    Control control2 = new Button( composite, SWT.PUSH );
    Control control3 = new Button( composite, SWT.PUSH );
    shell.open();
    // Disposing of a control focuses its parent if the parent itself was not
    // disposed of
    control1.dispose();
    assertSame( shell, display.getFocusControl() );
    control3.setFocus();
    control3.dispose();
    assertSame( composite, display.getFocusControl() );
    control2.setFocus();
    composite.dispose();
    assertSame( shell, display.getFocusControl() );
    shell.dispose();
    assertSame( null, display.getFocusControl() );
  }

  // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=373770
  @Test
  public void testDisposeOfFocusedInFocusLostEvent() {
    final Control control1 = new Button( shell, SWT.PUSH );
    control1.addFocusListener( new FocusAdapter() {
      @Override
      public void focusLost( FocusEvent event ) {
        control1.dispose();
      }
    } );
    Control control2 = new Button( shell, SWT.PUSH );
    shell.open();
    control1.setFocus();

    control2.setFocus();

    // ensures no exception is thrown
    assertTrue( control1.isDisposed() );
  }

  @Test
  public void testDisposeOfActiveShell_withFocusedControl_restoresFocusControl() {
    Control control = new Button( shell, SWT.PUSH );
    shell.open();
    control.setFocus();
    Shell shell1 = new Shell( shell, SWT.NONE );
    Control control1 = new Button( shell1, SWT.PUSH );
    shell1.open();
    control1.setFocus();

    shell1.dispose();

    assertSame( control, display.getFocusControl() );
  }

  @Test
  public void testDisposeOfActiveShell_withFocusedShell_restoresFocusControl() {
    Control control = new Button( shell, SWT.PUSH );
    shell.open();
    control.setFocus();
    Shell shell1 = new Shell( shell, SWT.NONE );
    shell1.open();
    shell1.setFocus();

    shell1.dispose();

    assertSame( control, display.getFocusControl() );
  }

  // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=265634
  @Test
  public void testNoFocusOutOnDispose() {
    final StringBuilder log = new StringBuilder();
    Control control = new Button( shell, SWT.PUSH );
    control.addFocusListener( new FocusAdapter() {
      @Override
      public void focusLost( FocusEvent event ) {
        log.append( "focusout" );
      }
    } );
    shell.open();
    control.dispose();
    assertEquals( "", log.toString() );
  }

  @Test
  public void testHideFocusedControl() {
    shell.setLayout( new FillLayout() );
    Composite composite = new Composite( shell, SWT.NONE );
    Control control = new Button( composite, SWT.PUSH );
    shell.setSize( 100, 100 );
    shell.open();

    // Hide control -> its parent (composite) must take focus
    control.setFocus();
    assertTrue( control.isFocusControl() );
    control.setVisible( false );
    assertFalse( control.isFocusControl() );
    assertTrue( composite.isFocusControl() );
    assertSame( composite, display.getFocusControl() );

    // Indirectly hide control -> shell must take focus
    control.setVisible( true );
    control.setFocus();
    composite.setVisible( false );
    assertFalse( control.isVisible() );
    assertFalse( control.isFocusControl() );
    assertFalse( composite.isFocusControl() );
    assertTrue( shell.isFocusControl() );
    assertSame( shell, display.getFocusControl() );

    // Indirectly hide control and leave no visible parent
    // no control must have focus
    control.setVisible( true );
    control.setFocus();
    shell.setVisible( false );
    assertFalse( shell.isVisible() );
    assertFalse( shell.isFocusControl() );
    assertFalse( composite.isFocusControl() );
    assertNull( display.getFocusControl() );
  }

  @Test
  public void testFocusEventsForForceFocus() {
    final StringBuilder log = new StringBuilder();
    final Control control1 = new Button( shell, SWT.PUSH );
    control1.addFocusListener( new FocusAdapter() {
      @Override
      public void focusGained( FocusEvent event ) {
        assertSame( control1, event.getSource() );
        log.append( "focusGained" );
      }
      @Override
      public void focusLost( FocusEvent event ) {
        log.append( "focusLost" );
      }
    } );
    shell.open();
    // Changing focus programmatically must throw event
    control1.forceFocus();
    assertEquals( "focusGained", log.toString() );
    // Focusing the same control again must not cause an event.
    log.setLength( 0 );
    control1.forceFocus();
    assertEquals( "", log.toString() );
  }

  // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=323570
  @Test
  public void testFocusOnBlockedShell() {
    Control button1 = new Button( shell, SWT.PUSH );
    Shell shell2 = new Shell( shell, SWT.APPLICATION_MODAL );
    shell.open();
    assertEquals( button1, display.getFocusControl() );
    assertEquals( shell, display.getActiveShell() );
    shell2.open();
    button1.setFocus();
    assertEquals( shell2, display.getFocusControl() );
    assertEquals( shell2, display.getActiveShell() );
  }

  @Test
  public void testToControl() {
    Control control = new Button( shell, SWT.PUSH );
    Point controlCoords = control.toControl( 0, 0 );
    assertEquals( new Point( 0, 0 ), control.toDisplay( controlCoords.x,
                                                        controlCoords.y ) );
    controlCoords = control.toControl( new Point( 0, 0 ) );
    assertEquals( new Point( 0, 0 ), control.toDisplay( controlCoords ) );
    try {
      control.toControl( null );
      fail( "No exception thrown for null-argument" );
    } catch( IllegalArgumentException e ) {
    }
  }

  @Test
  public void testToDisplay() {
    final Control control = new Button( shell, SWT.PUSH );
    Point displayCoords = control.toDisplay( 0, 0 );
    assertEquals( new Point( 0, 0 ), control.toControl( displayCoords.x,
                                                        displayCoords.y ) );
    displayCoords = control.toDisplay( new Point( 0, 0 ) );
    assertEquals( new Point( 0, 0 ), control.toControl( displayCoords ) );
    try {
      control.toDisplay( null );
      fail( "No exception thrown for null-argument" );
    } catch( IllegalArgumentException e ) {
    }
  }

  @Test
  public void testGetOrientation() {
    Composite childDefault = new Composite( shell, SWT.NONE );
    assertTrue( "default orientation: SWT.LEFT_TO_RIGHT",
                ( shell.getStyle() & SWT.LEFT_TO_RIGHT ) != 0 );
    assertEquals( SWT.LEFT_TO_RIGHT, shell.getOrientation() );
    assertTrue( "default orientation inherited: SWT.LEFT_TO_RIGHT",
                ( childDefault.getStyle() & SWT.LEFT_TO_RIGHT ) != 0 );
    assertEquals( SWT.LEFT_TO_RIGHT, childDefault.getOrientation() );
  }

  @Test
  public void testSetOrientation() {
    Control control = new Button( shell, SWT.NONE );

    control.setOrientation( SWT.RIGHT_TO_LEFT );

    assertEquals( SWT.RIGHT_TO_LEFT, control.getOrientation() );
  }

  @Test
  public void testMirrored_inital() {
    Control control = new Button( shell, SWT.NONE );

    assertTrue( ( control.getStyle() & SWT.MIRRORED ) == 0 );
  }

  @Test
  public void testMirrored_RTL() {
    Control control = new Button( shell, SWT.RIGHT_TO_LEFT );

    assertTrue( ( control.getStyle() & SWT.MIRRORED ) != 0 );
  }

  @Test
  public void testMirrored_afterOrientationChangeToRTL() {
    Control control = new Button( shell, SWT.NONE );

    control.setOrientation( SWT.RIGHT_TO_LEFT );

    assertTrue( ( control.getStyle() & SWT.MIRRORED ) != 0 );
  }

  @Test
  public void testMirrored_afterOrientationChangeToLTR() {
    Control control = new Button( shell, SWT.RIGHT_TO_LEFT );

    control.setOrientation( SWT.LEFT_TO_RIGHT );

    assertTrue( ( control.getStyle() & SWT.MIRRORED ) == 0 );
  }

  @Test
  public void testShowEvent() {
    final java.util.List<Event> log = new ArrayList<Event>();
    Listener showListener = new Listener() {
      @Override
      public void handleEvent( Event event ) {
        log.add( event );
      }
    };
    shell.addListener( SWT.Show, showListener );
    Control control = new Button( shell, SWT.NONE );
    control.addListener( SWT.Show, showListener );
    // Separate test for shell (since it overides setVisible); Show event is
    // only sent for the shell itself, not for its containing controls
    shell.setVisible( true );
    assertEquals( 1, log.size() );
    Event event = log.get( 0 );
    assertSame( shell, event.widget );
    // Calling setVisible(true) on an already visible control does not trigger
    // event
    log.clear();
    control.setVisible( true );
    assertEquals( 0, log.size() );
    // Making an invisible control visible, sends the Show event
    control.setVisible( false );
    log.clear();
    control.setVisible( true );
    assertEquals( 1, log.size() );
    assertSame( control, log.get( 0 ).widget );
  }

  @Test
  public void testShowEventDetails() {
    Listener ensureInvisible = new Listener() {
      @Override
      public void handleEvent( Event event ) {
        assertFalse( ( ( Control )event.widget ).getVisible() );
      }
    };
    shell.addListener( SWT.Show, ensureInvisible );
    shell.setVisible( true );
  }

  @Test
  public void testHideEvent() {
    final java.util.List<Event> log = new ArrayList<Event>();
    Listener showListener = new Listener() {
      @Override
      public void handleEvent( Event event ) {
        log.add( event );
      }
    };
    shell.addListener( SWT.Hide, showListener );
    Control control = new Button( shell, SWT.NONE );
    control.addListener( SWT.Hide, showListener );
    shell.open();

    log.clear();
    control.setVisible( false );
    assertEquals( 1, log.size() );
    assertSame( control, log.get( 0 ).widget );

    log.clear();
    shell.setVisible( false );
    assertEquals( 1, log.size() );
    assertSame( shell, log.get( 0 ).widget );

    log.clear();
    shell.setVisible( true );
    control.setVisible( true );
    shell.setVisible( false );
    assertEquals( 1, log.size() );
    assertSame( shell, log.get( 0 ).widget );
  }

  @Test
  public void testCursor() {
    final Control control = new Button( shell, SWT.PUSH );
    assertNull( control.getCursor() );
    Cursor handCursor = display.getSystemCursor( SWT.CURSOR_HAND );
    control.setCursor( handCursor );
    assertEquals( handCursor, control.getCursor() );
    Cursor crossCursor = display.getSystemCursor( SWT.CURSOR_CROSS );
    control.setCursor( crossCursor );
    assertEquals( crossCursor, control.getCursor() );
    control.setCursor( null );
    assertNull( control.getCursor() );
  }

  @Test
  public void testGetMonitor() {
    Monitor monitor = shell.getMonitor();
    assertNotNull( monitor );
    assertEquals( display.getPrimaryMonitor(), monitor );
  }


  @Test
  public void testUntypedHelpListener() {
    final Event[] untypedHelpEvent = { null };
    shell.addListener( SWT.Help, new Listener() {
      @Override
      public void handleEvent( Event event ) {
        untypedHelpEvent[ 0 ] = event;
      }
    } );
    shell.notifyListeners( SWT.Help, new Event() );
    assertNotNull( untypedHelpEvent[ 0 ] );
  }

  @Test
  public void testSetRedraw() {
    shell.setRedraw( true );
    assertTrue( display.needsRedraw( shell ) );
    shell.setRedraw( false );
    assertFalse( display.needsRedraw( shell ) );
  }

  @Test
  public void testRedraw() {
    shell.redraw();
    assertTrue( display.needsRedraw( shell ) );
  }

  @Test
  public void testRedrawWithBounds() {
    shell.redraw( 0, 0, -1, 0, true );
    assertFalse( display.needsRedraw( shell ) );
  }

  @Test
  public void testRedrawTriggersLCAInOrder() {
    final List<Widget> log = new ArrayList<Widget>();
    Composite control0 = new RedrawLogginShell( display, log );
    Composite control1 = new RedrawLogginShell( display, log );
    control0.redraw();
    control1.redraw();
    display.readAndDispatch();
    display.readAndDispatch();
    assertEquals( 2, log.size() );
    assertEquals( control0, log.get( 0 ) );
    assertEquals( control1, log.get( 1 ) );
    assertFalse( display.needsRedraw( control0 ) );
    assertFalse( display.needsRedraw( control1 ) );
  }

  @Test
  public void testRedrawDisposed() {
    shell.redraw();
    shell.dispose();
    assertFalse( display.needsRedraw( shell ) );
  }

  @Test
  public void testSetBackground() {
    Color color = display.getSystemColor( SWT.COLOR_RED );
    shell.setBackground( color );
    assertEquals( color, shell.getBackground() );
    shell.setBackground( null );
    ControlThemeAdapter themeAdapter = getThemeAdapter( shell );
    assertEquals( themeAdapter.getBackground( shell ), shell.getBackground() );
    Color color2 = new Color( display, 0, 0, 0 );
    color2.dispose();
    try {
      shell.setBackground( color2 );
      fail( "Disposed Image must not be set." );
    } catch( IllegalArgumentException e ) {
      // Expected Exception
    }
  }

  @Test
  public void testSetBackgroundImage() {
    ClassLoader loader = Fixture.class.getClassLoader();
    InputStream stream = loader.getResourceAsStream( Fixture.IMAGE1 );
    Image image = new Image( display, stream );
    image.dispose();
    try {
      shell.setBackgroundImage( image );
      fail( "Disposed Image must not be set." );
    } catch( IllegalArgumentException e ) {
      // Expected Exception
    }
    finally {
      try {
        stream.close();
      }
      catch( IOException e ) {
        fail( "Unable to close input stream." );
      }
    }
  }

  @Test
  public void testSetCursor() {
    Cursor cursor = new Cursor( display, SWT.NONE );
    shell.setCursor( cursor );
    assertEquals( cursor, shell.getCursor() );
    shell.setCursor( null );
    assertEquals( null, shell.getCursor() );
    cursor.dispose();
    try {
      shell.setCursor( cursor );
      fail( "Disposed Image must not be set." );
    } catch( IllegalArgumentException e ) {
      // Expected Exception
    }
  }

  @Test
  public void testSetFont() {
    Font controlFont = new Font( display, "BeautifullyCraftedTreeFont", 15, SWT.BOLD );
    shell.setFont( controlFont );
    assertSame( controlFont, shell.getFont() );
    Font itemFont = new Font( display, "ItemFont", 40, SWT.NORMAL );
    shell.setFont( itemFont );
    assertSame( itemFont, shell.getFont() );
    shell.setFont( null );
    ControlThemeAdapter themeAdapter = getThemeAdapter( shell );
    assertSame( themeAdapter.getFont( shell ), shell.getFont() );
    // Test with images, that should appear on unselected tabs
    Font font = new Font( display, "Testfont", 10, SWT.BOLD );
    font.dispose();
    try {
      shell.setFont( font );
      fail( "Disposed font must not be set." );
    } catch( IllegalArgumentException e ) {
      // Expected Exception
    }
  }

  @Test
  public void testSetForeground() {
    Color color = display.getSystemColor( SWT.COLOR_RED );
    shell.setForeground( color );
    assertEquals( color, shell.getForeground() );
    shell.setForeground( null );
    ControlThemeAdapter themeAdapter = getThemeAdapter( shell );
    assertEquals( themeAdapter.getForeground( shell ), shell.getForeground() );
    Color color2 = new Color( display, 255, 0, 0 );
    color2.dispose();
    try {
      shell.setForeground( color2 );
      fail( "Disposed color must not be set." );
    } catch( IllegalArgumentException e ) {
      // Expected Exception
    }
  }

  @Test
  public void testNotClearPackedOnSetLocation() {
    shell.pack();

    shell.setLocation( 1, 2 );

    IControlAdapter controlAdapter = shell.getAdapter( IControlAdapter.class );
    assertTrue( controlAdapter.isPacked() );
  }

  @Test
  public void testAddControlListenerWithNullArgument() {
    try {
      shell.addControlListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddControlListener() {
    shell.addControlListener( mock( ControlListener.class ) );

    assertTrue( shell.isListening( SWT.Move ) );
    assertTrue( shell.isListening( SWT.Resize ) );
  }

  @Test
  public void testRemoveControlListenerWithNullArgument() {
    try {
      shell.removeControlListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveControlListener() {
    ControlListener listener = mock( ControlListener.class );
    shell.addControlListener( listener );

    shell.removeControlListener( listener );

    assertFalse( shell.isListening( SWT.Move ) );
    assertFalse( shell.isListening( SWT.Resize ) );
  }

  @Test
  public void testAddFocusListener() {
    shell.addFocusListener( mock( FocusListener.class ) );

    assertTrue( shell.isListening( SWT.FocusIn ) );
    assertTrue( shell.isListening( SWT.FocusOut ) );
  }

  @Test
  public void testAddFocusListenerWithNullArgument() {
    try {
      shell.addFocusListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveFocusListener() {
    FocusListener listener = mock( FocusListener.class );
    shell.addFocusListener( listener );

    shell.removeFocusListener( listener );

    assertFalse( shell.isListening( SWT.FocusIn ) );
    assertFalse( shell.isListening( SWT.FocusOut ) );
  }

  @Test
  public void testRemoveFocusListenerWithNullArgument() {
    try {
      shell.removeFocusListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddHelpListener() {
    shell.addHelpListener( mock( HelpListener.class ) );

    assertTrue( shell.isListening( SWT.Help ) );
  }

  @Test
  public void testAddHelpListenerWithNullArgument() {
    try {
      shell.addHelpListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveHelpListener() {
    HelpListener listener = mock( HelpListener.class );
    shell.addHelpListener( listener );

    shell.removeHelpListener( listener );

    assertFalse( shell.isListening( SWT.Help ) );
  }

  @Test
  public void testRemoveHelpListenerWithNullArgument() {
    try {
      shell.removeHelpListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  private static ControlThemeAdapter getThemeAdapter( Control control ) {
    return ( ControlThemeAdapter )control.getAdapter( ThemeAdapter.class );
  }

  @Test
  public void testAddKeyListener() {
    shell.addKeyListener( mock( KeyListener.class ) );

    assertTrue( shell.isListening( SWT.KeyUp ) );
    assertTrue( shell.isListening( SWT.KeyDown ) );
  }

  @Test
  public void testAddKeyListenerWithNullArgument() {
    try {
      shell.addKeyListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveKeyListener() {
    KeyListener listener = mock( KeyListener.class );
    shell.addKeyListener( listener );

    shell.removeKeyListener( listener );

    assertFalse( shell.isListening( SWT.KeyUp ) );
    assertFalse( shell.isListening( SWT.KeyDown ) );
  }

  @Test
  public void testRemoveKeyListenerWithNullArgument() {
    try {
      shell.removeKeyListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddDragDetectDetectListener() {
    shell.addDragDetectListener( mock( DragDetectListener.class ) );

    assertTrue( shell.isListening( SWT.DragDetect ) );
  }

  @Test
  public void testAddDragDetectListenerWithNullArgument() {
    try {
      shell.addDragDetectListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveDragDetectListener() {
    DragDetectListener listener = mock( DragDetectListener.class );
    shell.addDragDetectListener( listener );

    shell.removeDragDetectListener( listener );

    assertFalse( shell.isListening( SWT.MenuDetect ) );
  }

  @Test
  public void testRemoveDragDetectListenerWithNullArgument() {
    try {
      shell.removeDragDetectListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddMenuDetectListener() {
    shell.addMenuDetectListener( mock( MenuDetectListener.class ) );

    assertTrue( shell.isListening( SWT.MenuDetect ) );
  }

  @Test
  public void testAddMenuDetectListenerWithNullArgument() {
    try {
      shell.addMenuDetectListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveMenuDetectListener() {
    MenuDetectListener listener = mock( MenuDetectListener.class );
    shell.addMenuDetectListener( listener );

    shell.removeMenuDetectListener( listener );

    assertFalse( shell.isListening( SWT.MenuDetect ) );
  }

  @Test
  public void testRemoveMenuDetectListenerWithNullArgument() {
    try {
      shell.removeMenuDetectListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddMouseListener() {
    shell.addMouseListener( mock( MouseListener.class ) );

    assertTrue( shell.isListening( SWT.MouseUp ) );
    assertTrue( shell.isListening( SWT.MouseDown ) );
    assertTrue( shell.isListening( SWT.MouseDoubleClick ) );
  }

  @Test
  public void testAddMouseListenerWithNullArgument() {
    try {
      shell.addMouseListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveMouseListener() {
    MouseListener listener = mock( MouseListener.class );
    shell.addMouseListener( listener );

    shell.removeMouseListener( listener );

    assertFalse( shell.isListening( SWT.MouseUp ) );
    assertFalse( shell.isListening( SWT.MouseDown ) );
    assertFalse( shell.isListening( SWT.MouseDoubleClick ) );
  }

  @Test
  public void testRemoveMouseListenerWithNullArgument() {
    try {
      shell.removeMouseListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testAddTraverseListener() {
    shell.addTraverseListener( mock( TraverseListener.class ) );

    assertTrue( shell.isListening( SWT.Traverse ) );
  }

  @Test
  public void testAddTraverseListenerWithNullArgument() {
    try {
      shell.addTraverseListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testRemoveTraverseListener() {
    TraverseListener listener = mock( TraverseListener.class );
    shell.addTraverseListener( listener );

    shell.removeTraverseListener( listener );

    assertFalse( shell.isListening( SWT.Traverse ) );
  }

  @Test
  public void testRemoveTraverseListenerWithNullArgument() {
    try {
      shell.removeTraverseListener( null );
    } catch( IllegalArgumentException expected ) {
    }
  }

  @Test
  public void testMarkupToolTipTextWithoutMarkupEnabled() {
    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.FALSE );

    try {
      shell.setToolTipText( "invalid xhtml: <<&>>" );
    } catch( IllegalArgumentException notExpected ) {
      fail();
    }
  }

  @Test( expected = IllegalArgumentException.class )
  public void testMarkupToolTipTextWithMarkupEnabled() {
    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );

    shell.setToolTipText( "invalid xhtml: <<&>>" );
  }

  @Test
  public void testMarkupTextWithMarkupEnabled_ValidationDisabled() {
    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );
    shell.setData( MarkupValidator.MARKUP_VALIDATION_DISABLED, Boolean.TRUE );

    try {
      shell.setToolTipText( "invalid xhtml: <<&>>" );
    } catch( IllegalArgumentException notExpected ) {
      fail();
    }
  }

  @Test
  public void testSetToolTipMarkupEnabled_onDirtyWidget() {
    shell.setToolTipText( "something" );

    try {
      shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );
      fail();
    } catch( SWTException expected ) {
      assertTrue( expected.throwable instanceof IllegalStateException );
    }
  }

  @Test
  public void testSetToolTipMarkupEnabled_onDirtyWidget_onceEnabledBefore() {
    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );
    shell.setToolTipText( "something" );

    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );
  }

  @Test
  public void testDisableMarkupIsIgnored() {
    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.TRUE );

    shell.setData( RWT.TOOLTIP_MARKUP_ENABLED, Boolean.FALSE );

    assertEquals( Boolean.TRUE, shell.getData( RWT.TOOLTIP_MARKUP_ENABLED ) );
  }

  @Test
  public void testPadding() throws IOException {
    String css = "Composite { padding: 1px 2px 3px 4px }";
    ThemeTestUtil.registerTheme( "custom", css, null );
    ThemeTestUtil.setCurrentThemeId( "custom" );

    Composite composite = new Composite( shell, SWT.NONE );

    BoxDimensions expected = new BoxDimensions( 1, 2, 3, 4 );
    assertEquals( expected, composite.getPadding() );
  }

  @Test
  public void testPadding_afterSettingCustomVariant() throws IOException {
    String css = "Composite { padding: 1px 2px 3px 4px } "
               + "Composite.abc { padding: 5px 6px 7px 8px }";
    ThemeTestUtil.registerTheme( "custom", css, null );
    ThemeTestUtil.setCurrentThemeId( "custom" );

    Composite composite = new Composite( shell, SWT.NONE );
    // buffer the padding
    composite.getPadding();
    composite.setData( RWT.CUSTOM_VARIANT, "abc" );


    BoxDimensions expected = new BoxDimensions( 5, 6, 7, 8 );
    assertEquals( expected, composite.getPadding() );
  }

  @Test
  public void testGetBorderWidth_returnsTheMaximumBorderEdgeWidth() throws IOException {
    String css = "Composite { border: 1px solid black; border-top: 3px solid black; }";
    ThemeTestUtil.registerTheme( "custom", css, null );
    ThemeTestUtil.setCurrentThemeId( "custom" );

    Composite composite = new Composite( shell, SWT.BORDER );

    assertEquals( 3, composite.getBorderWidth() );
  }

  @Test
  public void testGetBorder() throws IOException {
    String css = "Composite { border: 1px solid black; border-top: 3px solid black; }";
    ThemeTestUtil.registerTheme( "custom", css, null );
    ThemeTestUtil.setCurrentThemeId( "custom" );

    Composite composite = new Composite( shell, SWT.BORDER );

    BoxDimensions expected = new BoxDimensions( 3, 1, 1, 1 );
    assertEquals( expected, composite.getBorder() );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testSetParent_nullParent() {
    Control control = new Button( shell, SWT.NONE );

    control.setParent( null );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testSetParent_disposedParent() {
    Control control = new Button( shell, SWT.NONE );
    Composite parent = new Composite( shell, SWT.NONE );
    parent.dispose();

    control.setParent( parent );
  }

  @Test
  public void testSetParent() {
    Control control = new Button( shell, SWT.NONE );
    Composite parent = new Composite( shell, SWT.NONE );

    boolean success = control.setParent( parent );

    assertTrue( success );
    assertSame( parent, control.getParent() );
    assertFalse( Arrays.asList( shell.getChildren() ).contains( control ) );
    assertTrue( Arrays.asList( parent.getChildren() ).contains( control ) );
  }

  @Test
  public void testSetParent_withDisabledReparenting() {
    Control control = new Button( shell, SWT.NONE ) {
      @Override
      public boolean isReparentable() {
        return false;
      }
    };
    Composite parent = new Composite( shell, SWT.NONE );

    boolean success = control.setParent( parent );

    assertFalse( success );
    assertSame( shell, control.getParent() );
    assertTrue( Arrays.asList( shell.getChildren() ).contains( control ) );
    assertFalse( Arrays.asList( parent.getChildren() ).contains( control ) );
  }

  @Test
  public void testSetParent_fixesActiveControl() {
    Control control = new Button( shell, SWT.NONE );
    shell.open();
    control.setFocus();
    Shell parent = new Shell( display );

    control.setParent( parent );

    assertNull( shell.getAdapter( IShellAdapter.class ).getActiveControl() );
  }

  @Test
  public void testSetParent_fixesDefaultButton() {
    Button button = new Button( shell, SWT.NONE );
    shell.setDefaultButton( button );
    shell.open();
    Shell parent = new Shell( display );

    button.setParent( parent );

    assertNull( shell.getDefaultButton() );
  }

  @Test
  public void testSetParent_fixesSavedDefaultButton() {
    Button button = new Button( shell, SWT.NONE );
    shell.setDefaultButton( button, true );
    shell.open();
    Shell parent = new Shell( display );

    button.setParent( parent );
    shell.setDefaultButton( null, true );

    assertNull( shell.getDefaultButton() );
  }

  @Test
  public void testSetParent_fixesSavedFocus() {
    Control control = new Button( shell, SWT.NONE );
    shell.open();
    control.setFocus();
    Shell parent = new Shell( display );

    control.setParent( parent );

    assertNull( shell.getSavedFocus() );
  }

  @Test
  public void testSetParent_addsControlToReparentedList() {
    Control control = new Button( shell, SWT.NONE );
    shell.open();
    control.setFocus();
    Shell parent = new Shell( display );

    control.setParent( parent );

    assertSame( control, ReparentedControls.getAll().get( 0 ) );
  }

  @Test
  public void testSetParent_setsParentInRemoteAdapter() {
    Control control = new Button( shell, SWT.NONE );
    Composite parent = new Composite( shell, SWT.NONE );

    control.setParent( parent );

    assertSame( parent, control.getAdapter( RemoteAdapter.class ).getParent() );
  }

  @Test
  public void testIsReparentable() {
    Control control = new Button( shell, SWT.NONE );

    assertTrue( control.isReparentable() );
  }

  @Test
  public void testMoveAbove() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);

    child2.moveAbove( child1 );

    assertArrayEquals( new Control[] {child2, child1}, shell.getChildren() );
  }

  @Test
  public void testMoveAbove_ignoresWidgetWithDifferentParent() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);

    child1.moveAbove( shell );

    assertArrayEquals( new Control[] {child1, child2}, shell.getChildren() );
  }

  @Test( expected = SWTException.class )
  public void testMoveAbove_failsOnDisposed() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);
    child1.dispose();

    child1.moveAbove( child2 );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testMoveAbove_failsWithDisposed() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);
    child2.dispose();

    child1.moveAbove( child2 );
  }

  @Test
  public void testMoveBelow() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);

    child1.moveBelow( child2 );

    assertArrayEquals( new Control[] {child2, child1}, shell.getChildren() );
  }

  @Test
  public void testMoveBelow_ignoresWidgetWithDifferentParent() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);

    child1.moveBelow( shell );

    assertArrayEquals( new Control[] {child1, child2}, shell.getChildren() );
  }

  @Test( expected = SWTException.class )
  public void testMoveBelow_failsOnDisposed() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);
    child1.dispose();

    child1.moveBelow( child2 );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testMoveBelow_failsWithDisposed() {
    Control child1 = new Label(shell, SWT.NONE);
    Control child2 = new Label(shell, SWT.NONE);
    child2.dispose();

    child1.moveBelow( child2 );
  }

  @Test
  public void testRemoteAdapter_isAControlRemoteAdapter() {
    Control control = new Control( shell, SWT.NONE ) {};

    RemoteAdapter adapter = control.getAdapter( RemoteAdapter.class );

    assertTrue( adapter instanceof ControlRemoteAdapter );
  }

  @Test
  public void testRemoteAdapter_isOnlyCreatedOnce() {
    Control control = new Control( shell, SWT.NONE ) {};

    RemoteAdapter adapter1 = control.getAdapter( RemoteAdapter.class );
    RemoteAdapter adapter2 = control.getAdapter( RemoteAdapter.class );

    assertSame( adapter1, adapter2 );
  }

  @Test
  public void testAdapterBounds() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setBounds( 1, 2, 3, 4 );

    assertEquals( control.getBounds(), control.getAdapter( IControlAdapter.class ).getBounds() );
  }

  @Test
  public void testAdapterBounds_returnsSameInstance() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setBounds( 1, 2, 3, 4 );

    assertSame( control.getAdapter( IControlAdapter.class ).getBounds(),
                control.getAdapter( IControlAdapter.class ).getBounds() );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testSetData_forActiveKeys_rejectsNonStringArray() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.ACTIVE_KEYS, "1-Foo-Bar" );
  }

  @Test
  public void testSetData_forActiveKeys_acceptsNull() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.ACTIVE_KEYS, new String[] { "foo" } );

    control.setData( RWT.ACTIVE_KEYS, null );

    assertNull( control.getData( RWT.ACTIVE_KEYS ) );
  }

  @Test
  public void testSetData_forActiveKeys_preservesActiveKeys() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.ACTIVE_KEYS, new String[] { "foo"} );

    ControlRemoteAdapter adapter = ( ControlRemoteAdapter )control.getAdapter( RemoteAdapter.class );
    assertTrue( adapter.hasPreservedActiveKeys() );
  }

  @Test( expected = IllegalArgumentException.class )
  public void testSetData_forCancelKeys_rejectsNonStringArray() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.CANCEL_KEYS, "1-Foo-Bar" );
  }

  @Test
  public void testSetData_forCancelKeys_acceptsNull() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.CANCEL_KEYS, new String[] { "foo" } );

    control.setData( RWT.CANCEL_KEYS, null );

    assertNull( control.getData( RWT.CANCEL_KEYS ) );
  }

  @Test
  public void testSetData_forCancelKeys_preservesCancelKeys() {
    Control control = new Control( shell, SWT.NONE ) {};
    control.setData( RWT.CANCEL_KEYS, new String[] { "foo"} );

    ControlRemoteAdapter adapter = ( ControlRemoteAdapter )control.getAdapter( RemoteAdapter.class );
    assertTrue( adapter.hasPreservedCancelKeys() );
  }

  private static class RedrawLogginShell extends Shell {
    private final List<Widget> log;

    private RedrawLogginShell( Display display, List<Widget> log ) {
      super( display );
      this.log = log;
    }

    @Override
    @SuppressWarnings("unchecked")
    public <T> T getAdapter( Class<T> adapter ) {
      Object result = null;
      if( adapter == WidgetLCA.class ) {
        result = new LoggingWidgetLCA( log );
      } else {
        result = super.getAdapter( adapter );
      }
      return ( T )result;
    }
  }

  private static class LoggingWidgetLCA extends WidgetLCA {
    private final List<Widget> log;

    public LoggingWidgetLCA( List<Widget> log ) {
      this.log = log;
    }

    @Override
    public void readData( Widget widget ) {
    }

    @Override
    public void preserveValues( Widget widget ) {
    }

    @Override
    public void renderInitialization( Widget widget ) throws IOException {
    }

    @Override
    public void doRedrawFake( Control control ) {
      log.add( control );
    }

    @Override
    public void renderChanges( Widget widget ) throws IOException {
    }

    @Override
    public void renderDispose( Widget widget ) throws IOException {
    }
  }

}