def test_corners_and_dimensions_correctly_calculated(self):
for corner1, corner2 in self.RECT_CORNER_TEST_CASES:
# Arrange
rect = Rectangle(corner1, corner2)
x1 = min(corner1.x, corner2.x)
x2 = max(corner1.x, corner2.x)
y1 = min(corner1.y, corner2.y)
y2 = max(corner1.y, corner2.y)
width = x2 - x1
height = y2 - y1
# Check dimensions
self.assertEquals(rect.width(), width)
self.assertEquals(rect.height(), height)
self.assertEquals(rect.area(), width * height)
# Test that all corners are correct
self.assertEqual(rect.top_left().x, x1)
self.assertEquals(rect.top_left().y, y1)
self.assertEquals(rect.bottom_left().x, x1)
self.assertEquals(rect.bottom_left().y, y2)
self.assertEquals(rect.top_right().x, x2)
self.assertEquals(rect.top_right().y, y1)
self.assertEquals(rect.bottom_right().x, x2)
self.assertEquals(rect.bottom_right().y, y2)
def test_zero_area_square_can_exist(self):
rec = Rectangle(Point(0, 0), Point(0, 0))
self.failUnlessEqual(0.0, rec.area())