1 from __future__ import print_function, division, absolute_import 2 from fontTools.misc.py23 import * 3 from fontTools.misc.transform import Transform, Identity, Offset, Scale 4 import math 5 import pytest 6 7 8 class TransformTest(object): 9 10 def test_examples(self): 11 t = Transform() 12 assert repr(t) == "<Transform [1 0 0 1 0 0]>" 13 assert t.scale(2) == Transform(2, 0, 0, 2, 0, 0) 14 assert t.scale(2.5, 5.5) == Transform(2.5, 0, 0, 5.5, 0, 0) 15 assert t.scale(2, 3).transformPoint((100, 100)) == (200, 300) 16 17 def test__init__(self): 18 assert Transform(12) == Transform(12, 0, 0, 1, 0, 0) 19 assert Transform(dx=12) == Transform(1, 0, 0, 1, 12, 0) 20 assert Transform(yx=12) == Transform(1, 0, 12, 1, 0, 0) 21 22 def test_transformPoints(self): 23 t = Transform(2, 0, 0, 3, 0, 0) 24 assert t.transformPoints( 25 [(0, 0), (0, 100), (100, 100), (100, 0)] 26 ) == [(0, 0), (0, 300), (200, 300), (200, 0)] 27 28 def test_translate(self): 29 t = Transform() 30 assert t.translate(20, 30) == Transform(1, 0, 0, 1, 20, 30) 31 32 def test_scale(self): 33 t = Transform() 34 assert t.scale(5) == Transform(5, 0, 0, 5, 0, 0) 35 assert t.scale(5, 6) == Transform(5, 0, 0, 6, 0, 0) 36 37 def test_rotate(self): 38 t = Transform() 39 assert t.rotate(math.pi / 2) == Transform(0, 1, -1, 0, 0, 0) 40 t = Transform() 41 assert t.rotate(-math.pi / 2) == Transform(0, -1, 1, 0, 0, 0) 42 t = Transform() 43 assert tuple(t.rotate(math.radians(30))) == pytest.approx( 44 tuple(Transform(0.866025, 0.5, -0.5, 0.866025, 0, 0))) 45 46 def test_skew(self): 47 t = Transform().skew(math.pi / 4) 48 assert tuple(t) == pytest.approx(tuple(Transform(1, 0, 1, 1, 0, 0))) 49 50 def test_transform(self): 51 t = Transform(2, 0, 0, 3, 1, 6) 52 assert t.transform((4, 3, 2, 1, 5, 6)) == Transform(8, 9, 4, 3, 11, 24) 53 54 def test_reverseTransform(self): 55 t = Transform(2, 0, 0, 3, 1, 6) 56 reverse_t = t.reverseTransform((4, 3, 2, 1, 5, 6)) 57 assert reverse_t == Transform(8, 6, 6, 3, 21, 15) 58 t = Transform(4, 3, 2, 1, 5, 6) 59 reverse_t = t.transform((2, 0, 0, 3, 1, 6)) 60 assert reverse_t == Transform(8, 6, 6, 3, 21, 15) 61 62 def test_inverse(self): 63 t = Transform().translate(2, 3).scale(4, 5) 64 assert t.transformPoint((10, 20)) == (42, 103) 65 it = t.inverse() 66 assert it.transformPoint((42, 103)) == (10.0, 20.0) 67 assert Transform().inverse() == Transform() 68 69 def test_toPS(self): 70 t = Transform().scale(2, 3).translate(4, 5) 71 assert t.toPS() == '[2 0 0 3 8 15]' 72 73 def test__ne__(self): 74 assert Transform() != Transform(2, 0, 0, 2, 0, 0) 75 76 def test__hash__(self): 77 t = Transform(12, 0, 0, 13, 0, 0) 78 d = {t: None} 79 assert t in d.keys() 80 81 def test__bool__(self): 82 assert not bool(Transform()) 83 assert Transform(2, 0, 0, 2, 0, 0) 84 assert Transform(1, 0, 0, 1, 1, 0) 85 86 def test__repr__(self): 87 assert repr(Transform(1, 2, 3, 4, 5, 6)) == '<Transform [1 2 3 4 5 6]>' 88 89 def test_Identity(self): 90 assert isinstance(Identity, Transform) 91 assert Identity == Transform(1, 0, 0, 1, 0, 0) 92 93 def test_Offset(self): 94 assert Offset() == Transform(1, 0, 0, 1, 0, 0) 95 assert Offset(1) == Transform(1, 0, 0, 1, 1, 0) 96 assert Offset(1, 2) == Transform(1, 0, 0, 1, 1, 2) 97 98 def test_Scale(self): 99 assert Scale(1) == Transform(1, 0, 0, 1, 0, 0) 100 assert Scale(2) == Transform(2, 0, 0, 2, 0, 0) 101 assert Scale(1, 2) == Transform(1, 0, 0, 2, 0, 0) 102
