def test_in(self):
f1 = Field(0, 0)
f2 = Field(10, 0)
f3 = Field(10, 10)
f4 = Field(0, 10)
rectangle = Rectangle(f1, f3)
ft = rectangle.field(3, 8)
self.assertTrue(ft in rectangle)
self.assertTrue(f1 in rectangle)
self.assertTrue(f2 in rectangle)
self.assertTrue(f3 in rectangle)
self.assertTrue(f4 in rectangle)
def test_confine(self):
rect = Rectangle(Field(0, 0), Field(15, 15))
f = rect.field(5, 5)
expected = Rectangle(Field(4, 4), Field(6, 6))
self.assertEqual(f.confine(), expected)
