assertCoordinatesEqualWallPoints(504, 20, 504, 300, wall2);
assertCoordinatesEqualWallPoints(504, 300, 24, 300, wall3);
assertCoordinatesEqualWallPoints(20, 20, 24, 300, wall4);
// 8. Click at (504, 40) with Shift key depressed
planController.moveMouse(504, 40);
planController.pressMouse(504, 40, 1, true, false);
planController.releaseMouse(504, 40);
// Check the second wall was removed from selection
assertSelectionContains(home, wall3);