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import cairo
import pytest
def test_matrix():
m = cairo.Matrix()
m.rotate(10)
m.scale(1.5, 2.5)
m.translate(10, 20)
with pytest.raises(TypeError):
m * 42
with pytest.raises(TypeError):
m + 42
with pytest.raises(TypeError):
cairo.Matrix(object())
assert m != 42
assert m == m
assert m != cairo.Matrix()
assert repr(cairo.Matrix()) == "cairo.Matrix(1, 0, 0, 1, 0, 0)"
def test_init_rotate():
r = cairo.Matrix.init_rotate(0)
assert cairo.Matrix() == r
with pytest.raises(TypeError):
cairo.Matrix.init_rotate(object())
def test_invert():
m = cairo.Matrix(1, 1)
m.invert()
assert m == cairo.Matrix(1, -1, -0, 1, 0, 0)
def test_matrix_properties():
m = cairo.Matrix(*range(6))
assert [m.xx, m.yx, m.xy, m.yy, m.x0, m.y0] == list(range(6))
m.xx = 42
assert m.xx == 42
m.scale(2, 2)
assert m.xx == 84
def test_get_item():
m = cairo.Matrix(1, 2, 3, 4, 5, 6)
for i in range(6):
assert m[i] == i + 1
with pytest.raises(IndexError):
m[6]
with pytest.raises(IndexError):
m[-1]
def test_multiply():
with pytest.raises(TypeError):
cairo.Matrix().multiply(object())
m = cairo.Matrix(1, 1, 0, 1)
assert m.multiply(m) == cairo.Matrix(1, 2, 0, 1, 0, 0)
assert m * m == m.multiply(m)
def test_translate():
m = cairo.Matrix()
m.translate(1, 1)
assert m == cairo.Matrix(1, 0, 0, 1, 1, 1)
with pytest.raises(TypeError):
m.translate(1, object())
def test_rotate():
m = cairo.Matrix()
with pytest.raises(TypeError):
m.rotate(object())
def test_scale():
m = cairo.Matrix()
with pytest.raises(TypeError):
m.scale(object())
m.scale(2, 2)
assert m != cairo.Matrix()
m.scale(0.5, 0.5)
assert m == cairo.Matrix()
def test_transform_distance():
m = cairo.Matrix()
assert m.transform_distance(1, 1) == (1, 1)
with pytest.raises(TypeError):
m.transform_distance(1, object())
def test_transform_point():
m = cairo.Matrix()
assert m.transform_point(1, 1) == (1, 1)
with pytest.raises(TypeError):
m.transform_point(1, object())
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