KeyboardOperationMoveLeft extends KeyboardOperationMove { @Override SelectionExtension getSelectionExtension() { return SelectionExtension.LEFT; } KeyboardOperationMoveLeft(final GridLayer gridLayer);  KeyboardOperationMoveLeft(final GridLayer gridLayer,
                                     final GridLienzoScrollable panel); @Override int getKeyCode();  }
@Test public void testGetSelectionExtension() { final SelectionExtension actual = keyboardOperation.getSelectionExtension(); assertEquals(SelectionExtension.LEFT, actual); }