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import unittest
from random import random
from svgelements import *
class TestElementPoint(unittest.TestCase):
def test_point_init_string(self):
p = Point("(0,24)")
self.assertEqual(p, (0, 24))
self.assertEqual(p, 0 + 24j)
self.assertEqual(p, [0, 24])
self.assertEqual(p, "(0,24)")
def test_polar_angle(self):
for i in range(1000):
p = Point(random() * 50, random() * 50)
a = random() * tau - tau / 2
r = random() * 50
m = Point.polar(p, a, r)
self.assertAlmostEqual(Point.angle(p, m), a)
def test_not_equal_unparsed(self):
self.assertNotEqual(Point(0, 0), "string that doesn't parse to point")
def test_dunder_iadd(self):
p = Point(0)
p += (1, 0)
self.assertEqual(p, (1, 0))
p += Point(1, 1)
self.assertEqual(p, (2, 1))
p += 1 + 2j
self.assertEqual(p, (3, 3))
class c:
def __init__(self):
self.x = 1
self.y = 1
p += c()
self.assertEqual(p, (4, 4))
p += Point("-4,-4")
self.assertEqual(p, (0, 0))
p += 1
self.assertEqual(p, (1, 0))
self.assertRaises(TypeError, 'p += "hello"')
def test_dunder_isub(self):
p = Point(0)
p -= (1, 0)
self.assertEqual(p, (-1, 0))
p -= Point(1, 1)
self.assertEqual(p, (-2, -1))
p -= 1 + 2j
self.assertEqual(p, (-3, -3))
class c:
def __init__(self):
self.x = 1
self.y = 1
p -= c()
self.assertEqual(p, (-4, -4))
p -= Point("-4,-4")
self.assertEqual(p, (0, 0))
p -= 1
self.assertEqual(p, (-1, 0))
r = p - 1
self.assertEqual(r, (-2, 0))
self.assertRaises(TypeError, 'p -= "hello"')
def test_dunder_add(self):
p = Point(0)
p = p + (1, 0)
self.assertEqual(p, (1, 0))
p = p + Point(1, 1)
self.assertEqual(p, (2, 1))
p = p + 1 + 2j
self.assertEqual(p, (3, 3))
class c:
def __init__(self):
self.x = 1
self.y = 1
p = p + c()
self.assertEqual(p, (4, 4))
p = p + Point("-4,-4")
self.assertEqual(p, (0, 0))
p = p + 1
self.assertEqual(p, (1, 0))
self.assertRaises(TypeError, 'p = p + "hello"')
def test_dunder_sub(self):
p = Point(0)
p = p - (1, 0)
self.assertEqual(p, (-1, 0))
p = p - Point(1, 1)
self.assertEqual(p, (-2, -1))
p = p - (1 + 2j)
self.assertEqual(p, (-3, -3))
class c:
def __init__(self):
self.x = 1
self.y = 1
p = p - c()
self.assertEqual(p, (-4, -4))
p = p - Point("-4,-4")
self.assertEqual(p, (0, 0))
p = p - 1
self.assertEqual(p, (-1, 0))
self.assertRaises(TypeError, 'p = p - "hello"')
def test_dunder_rsub(self):
p = Point(0)
p = (1, 0) - p
self.assertEqual(p, (1, 0))
p = Point(1, 1) - p
self.assertEqual(p, (0, 1))
p = (1 + 2j) - p
self.assertEqual(p, (1, 1))
class c:
def __init__(self):
self.x = 1
self.y = 1
p = c() - p
self.assertEqual(p, (0, 0))
p = Point("-4,-4") - p
self.assertEqual(p, (-4, -4))
p = 1 - p
self.assertEqual(p, (5, 4))
self.assertRaises(TypeError, 'p = "hello" - p')
def test_dunder_mult(self):
"""
For backwards compatibility multiplication of points works like multiplication of complex variables.
:return:
"""
p = Point(2, 2)
p *= (1, 0)
self.assertEqual(p, (2, 2))
p *= Point(1, 1)
self.assertEqual(p, (0, 4))
p *= 1 + 2j
self.assertEqual(p, (-8, 4))
class c:
def __init__(self):
self.x = 1
self.y = 1
p *= c()
self.assertEqual(p, (-12, -4))
p *= Point("-4,-4")
self.assertEqual(p, (32, 64))
p *= 1
self.assertEqual(p, (32, 64))
r = p * 1
self.assertEqual(r, (32, 64))
r *= "scale(0.1)"
self.assertEqual(r, (3.2, 6.4))
def test_dunder_transform(self):
p = Point(4, 4)
m = Matrix("scale(4)")
p.matrix_transform(m)
self.assertEqual(p, (16, 16))
def test_move_towards(self):
p = Point(4, 4)
p.move_towards((6, 6), 0.5)
self.assertEqual(p, (5, 5))
def test_distance_to(self):
p = Point(4, 4)
m = p.distance_to((6, 6))
self.assertEqual(m, 2 * sqrt(2))
m = p.distance_to(4)
self.assertEqual(m, 4)
def test_angle_to(self):
p = Point(0)
a = p.angle_to((3, 3))
self.assertEqual(a, Angle.parse("45deg"))
a = p.angle_to((0, 3))
self.assertEqual(a, Angle.parse("0.25turn"))
a = p.angle_to((-3, 0))
self.assertEqual(a, Angle.parse("200grad"))
def test_polar(self):
p = Point(0)
q = p.polar_to(Angle.parse("45deg"), 10)
self.assertEqual(q, (sqrt(2)/2 * 10, sqrt(2)/2 * 10))
def test_reflected_across(self):
p = Point(0)
r = p.reflected_across((10,10))
self.assertEqual(r, (20,20))
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