assertNull("Wrong texture on wall 2 right side", wall2.getRightSideTexture());
// 3. Edit walls
JDialog attributesDialog = showWallPanel(preferences, controller, frame, tester);
// Retrieve WallPanel components
WallPanel wallPanel = (WallPanel)TestUtilities.findComponent(
attributesDialog, WallPanel.class);
JSpinner xStartSpinner =
(JSpinner)TestUtilities.getField(wallPanel, "xStartSpinner");
JSpinner xEndSpinner =
(JSpinner)TestUtilities.getField(wallPanel, "xEndSpinner");