protected void selectionTest(int start, int length) throws Exception{
protected void selectionTest(int startLine, int startColumn, int endLine, int endColumn) throws Exception{
	protected void selectionTest(int start, int length) throws Exception{		ICompilationUnit unit= createCU(getSelectionPackage(), "A");		String source= unit.getSource();		int[] selection= getSelection(source);		assertEquals(start, selection[0]);		assertEquals(length, selection[1]);	}