Bug 179629 After create a x-tab with a cube, a error occurs in Problems sheet[1102]
Description: After create a x-tab with a cube, a error occurs in Problems sheet[1102] Build number: 2.2.0.v20070328-0630 Steps to reproduce: 1, Create a cube 2, Create a x-tab using the cube 3, Check the error message in Problems sheet Expected result: No error occurs after create a x-tab Actual result: The error message is "The ExtendedItem must be able to access one data set."
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/extension/ReportItemExtensionTest.java
*/
	public void testOpenDesignFileWithWrongExtension( )
			throws DesignFileException, SemanticException
	{
		openDesign( fileName_4 );
		List list = designHandle.getErrorList( );
		assertEquals( 2, list.size( ) );
		int i = 0;
		assertEquals( SemanticError.DESIGN_EXCEPTION_MISSING_DATA_SET,
				( (ErrorDetail) list.get( i++ ) ).getErrorCode( ) );
		assertEquals( SemanticError.DESIGN_EXCEPTION_EXTENSION_NOT_FOUND,
				( (ErrorDetail) list.get( i++ ) ).getErrorCode( ) );
		ExtendedItemHandle itemHandle = (ExtendedItemHandle) designHandle
				.findElement( "right extended item" ); 
		
		try
		{
			itemHandle.getReportItem( );
			fail( );
		}
		catch ( ExtendedElementException e )
		{
			assertEquals( SemanticError.DESIGN_EXCEPTION_EXTENSION_NOT_FOUND, e
					.getErrorCode( ) );
		}
		testExtendedItemWithoutExtension( itemHandle );
	}
	/**
	 * Tests method calls on an extended item without the valid extension.
	 *