Bug 183918 get relative file path of linkage library
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/library/DesignLoadLibraryTest.java
* @throws Exception
	 */
	public void testGetExternalizedMessage( ) throws Exception
	{
		openDesign( "LibraryWithExternalizedMessage.xml" ); 
		LabelHandle label1Handle = (LabelHandle) designHandle
				.findElement( "NewLabel" ); 
		LabelHandle label2Handle = (LabelHandle) designHandle
				.findElement( "NewLabel1" );
		String displayValue = label1Handle.getDisplayText( );
		assertEquals( "v1", displayValue );
		displayValue = label2Handle.getDisplayText( );
		assertEquals( "v2", displayValue );
	}
	/**
	 * Tests case : a label extends a library label, and the library label has a
	 * user property, then the label in the design can be dropped.
	 * 
	 * @throws Exception
	 */
	public void testLibraryWithUserProperty( ) throws Exception
	{
		openDesign( "DesignWithUserProperty.xml" ); 
		LabelHandle label = (LabelHandle) designHandle.findElement( "NewLabel" ); 
		assertEquals( designHandle, label.getRoot( ) );
		label.drop( );
		assertNull( label.getRoot( ) );
		assertNull( designHandle.findElement( "NewLabel" ) ); 
	}
}