def test_line_cosine(self):
"""Test the line_cosine method."""
points = np.array([[1, 1], [0, 0], [-1, 1], [0.8, 0.5]])
ch = ConvexHull(points)
self.assertTrue(np.allclose(ch.line_cosine(0, 1), math.cos(5*math.pi/4)))
self.assertTrue(np.allclose(ch.line_cosine(0, 2), math.cos(math.pi)))
self.assertTrue(np.allclose(ch.line_cosine(1, 3), math.cos(0.5585993153435626)))
def test_point_distance(self):
"""Test the point_distance method."""
p1 = np.array([0, 0])
p2 = np.array([0, 7])
self.assertEquals(ConvexHull.point_distance(p1, p2), 7)
p1 = np.array([3.5, 7.4])
p2 = np.array([-6, -9.2])
self.assertEquals(ConvexHull.point_distance(p1, p2), 19.126160095534075)
def test_is_right_turn(self):
"""Test the is_right_turn method."""
points = np.array([[1, 1], [0, 0], [-1, 1], [0.8, 0.5]])
ch = ConvexHull(points)
ch.convex_hull = [1, 2]
self.assertTrue(ch.is_right_turn(0))
self.assertTrue(ch.is_right_turn(3))
ch.convex_hull = [0, 1]
self.assertTrue(ch.is_right_turn(2))
self.assertFalse(ch.is_right_turn(3))
ch.convex_hull = [1, 0]
self.assertFalse(ch.is_right_turn(2))
self.assertTrue(ch.is_right_turn(3))
