def testMirrorPoint(self):
L1 = Line(Point(2, 0), Point(0, 2))
# A vertical line at x=1
L2 = Line(1, 0, 1)
p1 = Point(0, 0)
p2 = Point(0, 2)
p = Point(2, 2)
self.assertEqual(p.mirror_point(L1), p1)
self.assertEqual(p.mirror_point(L2), p2)
def testLineThroughPoint(self):
p = Point(-1, -1)
a = Point(-2, 0)
b = Point(-1, 0)
c = Point(0, -1)
# A line with slope = 45 degrees
self.assertTrue(p.line_through_point(a) == Line(p, a))
self.assertTrue(p.line_through_point(a) == Line(2, 2, -4))
# A vertical line
self.assertTrue(p.line_through_point(b) == Line(p, b))
self.assertTrue(p.line_through_point(b) == Line(1, 0, -1))
# A horizontal line
self.assertTrue(p.line_through_point(c) == Line(p, c))
self.assertTrue(p.line_through_point(c) == Line(0, 1, -1))
def testOnLine(self):
L = Line(-2, 1, 3)
a = Point(1, 5)
b = Point(-1, -2)
self.assertTrue(a.on_line(L))
self.assertFalse(b.on_line(L))
