def testRemovePointEmptyPointListShouldBeNone(self):
frontier = GreedyFrontier()
frontier.set_goal(Point(1, 2))
self.assertEqual([], frontier._points)
self.assertEqual(0, len(frontier._points))
point = frontier.remove_point()
self.assertEqual(None, point)
self.assertEqual([], frontier._points)
self.assertEqual(0, len(frontier._points))
def testRemovePointOnlyOnePointShouldBeOnlyPoint(self):
frontier = GreedyFrontier()
frontier.set_goal(Point(1, 2))
frontier.add_point(Point(1, 1))
self.assertEqual([Point(1, 1)], frontier._points)
self.assertEqual(1, len(frontier._points))
point = frontier.remove_point()
self.assertEqual(Point(1, 1), point)
self.assertEqual([], frontier._points)
self.assertEqual(0, len(frontier._points))
def testRemovePointMultiplePointsShouldBeSecondPoint(self):
frontier = GreedyFrontier()
frontier.set_goal(Point(2, 3))
frontier.add_point(Point(1, 1))
frontier.add_point(Point(3, 3))
frontier.add_point(Point(5, 5))
self.assertEqual([Point(1, 1), Point(3, 3), Point(5, 5)], frontier._points)
self.assertEqual(3, len(frontier._points))
point = frontier.remove_point()
self.assertEqual(Point(3, 3), point)
self.assertEqual([Point(1, 1), Point(5, 5)], frontier._points)
self.assertEqual(2, len(frontier._points))