| from fontTools.misc.transform import Transform, Identity, Offset, Scale |
| import math |
| import pytest |
| |
| |
| class TransformTest(object): |
| |
| def test_examples(self): |
| t = Transform() |
| assert repr(t) == "<Transform [1 0 0 1 0 0]>" |
| assert t.scale(2) == Transform(2, 0, 0, 2, 0, 0) |
| assert t.scale(2.5, 5.5) == Transform(2.5, 0, 0, 5.5, 0, 0) |
| assert t.scale(2, 3).transformPoint((100, 100)) == (200, 300) |
| |
| def test__init__(self): |
| assert Transform(12) == Transform(12, 0, 0, 1, 0, 0) |
| assert Transform(dx=12) == Transform(1, 0, 0, 1, 12, 0) |
| assert Transform(yx=12) == Transform(1, 0, 12, 1, 0, 0) |
| |
| def test_transformPoints(self): |
| t = Transform(2, 0, 0, 3, 0, 0) |
| assert t.transformPoints( |
| [(0, 0), (0, 100), (100, 100), (100, 0)] |
| ) == [(0, 0), (0, 300), (200, 300), (200, 0)] |
| |
| def test_transformVector(self): |
| t = Transform(2, 0, 0, 3, -10, 30) |
| assert t.transformVector((-4, 5)) == (-8, 15) |
| |
| def test_transformVectors(self): |
| t = Transform(2, 0, 0, 3, -10, 30) |
| assert t.transformVectors([(-4, 5), (-6, 7)]) == [(-8, 15), (-12, 21)] |
| |
| def test_translate(self): |
| t = Transform() |
| assert t.translate(20, 30) == Transform(1, 0, 0, 1, 20, 30) |
| |
| def test_scale(self): |
| t = Transform() |
| assert t.scale(5) == Transform(5, 0, 0, 5, 0, 0) |
| assert t.scale(5, 6) == Transform(5, 0, 0, 6, 0, 0) |
| |
| def test_rotate(self): |
| t = Transform() |
| assert t.rotate(math.pi / 2) == Transform(0, 1, -1, 0, 0, 0) |
| t = Transform() |
| assert t.rotate(-math.pi / 2) == Transform(0, -1, 1, 0, 0, 0) |
| t = Transform() |
| assert tuple(t.rotate(math.radians(30))) == pytest.approx( |
| tuple(Transform(0.866025, 0.5, -0.5, 0.866025, 0, 0))) |
| |
| def test_skew(self): |
| t = Transform().skew(math.pi / 4) |
| assert tuple(t) == pytest.approx(tuple(Transform(1, 0, 1, 1, 0, 0))) |
| |
| def test_transform(self): |
| t = Transform(2, 0, 0, 3, 1, 6) |
| assert t.transform((4, 3, 2, 1, 5, 6)) == Transform(8, 9, 4, 3, 11, 24) |
| |
| def test_reverseTransform(self): |
| t = Transform(2, 0, 0, 3, 1, 6) |
| reverse_t = t.reverseTransform((4, 3, 2, 1, 5, 6)) |
| assert reverse_t == Transform(8, 6, 6, 3, 21, 15) |
| t = Transform(4, 3, 2, 1, 5, 6) |
| reverse_t = t.transform((2, 0, 0, 3, 1, 6)) |
| assert reverse_t == Transform(8, 6, 6, 3, 21, 15) |
| |
| def test_inverse(self): |
| t = Transform().translate(2, 3).scale(4, 5) |
| assert t.transformPoint((10, 20)) == (42, 103) |
| it = t.inverse() |
| assert it.transformPoint((42, 103)) == (10.0, 20.0) |
| assert Transform().inverse() == Transform() |
| |
| def test_toPS(self): |
| t = Transform().scale(2, 3).translate(4, 5) |
| assert t.toPS() == '[2 0 0 3 8 15]' |
| |
| def test__ne__(self): |
| assert Transform() != Transform(2, 0, 0, 2, 0, 0) |
| |
| def test__hash__(self): |
| t = Transform(12, 0, 0, 13, 0, 0) |
| d = {t: None} |
| assert t in d.keys() |
| |
| def test__bool__(self): |
| assert not bool(Transform()) |
| assert Transform(2, 0, 0, 2, 0, 0) |
| assert Transform(1, 0, 0, 1, 1, 0) |
| |
| def test__repr__(self): |
| assert repr(Transform(1, 2, 3, 4, 5, 6)) == '<Transform [1 2 3 4 5 6]>' |
| |
| def test_Identity(self): |
| assert isinstance(Identity, Transform) |
| assert Identity == Transform(1, 0, 0, 1, 0, 0) |
| |
| def test_Offset(self): |
| assert Offset() == Transform(1, 0, 0, 1, 0, 0) |
| assert Offset(1) == Transform(1, 0, 0, 1, 1, 0) |
| assert Offset(1, 2) == Transform(1, 0, 0, 1, 1, 2) |
| |
| def test_Scale(self): |
| assert Scale(1) == Transform(1, 0, 0, 1, 0, 0) |
| assert Scale(2) == Transform(2, 0, 0, 2, 0, 0) |
| assert Scale(1, 2) == Transform(1, 0, 0, 2, 0, 0) |
