def test_3(self):
t = Transformation(1, 0, 1, 0, 1, 1)
p = 0, 0
pt = t.transform(p)
self.assertEqual(1.0, pt[0])
self.assertEqual(1.0, pt[1])
ptt = t.untransform(pt)
self.assertEqual(0.0, ptt[0])
self.assertEqual(0.0, ptt[1])
def test_transformation_1_0_1():
"""
Test transformation for (1, 0, 1, ...).
"""
t = Transformation(1, 0, 1, 0, 1, 1)
p = 0, 0
pt = t.transform(p)
assert 1.0 == pt[0]
assert 1.0 == pt[1]
ptt = t.untransform(pt)
assert 0.0 == ptt[0]
assert 0.0 == ptt[1]
def test_transformation_identity():
"""
Test identity transformation.
"""
t = Transformation(1, 0, 0, 0, 1, 0)
p = 1, 1
pt = t.transform(p)
assert 1.0 == pt[0]
assert 1.0 == pt[1]
ptt = t.untransform(pt)
assert 1.0 == pt[0]
assert 1.0 == pt[1]
def web_mercator():
wm = WebMercator(10)
wm.transformation = Transformation(1, 0, 0, 0, 1, 0)
return wm