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moved test for checking if `Arc()` throws `acos` domain error due to numerical error

pull/36/merge
Andy 2017-12-26 00:57:48 -05:00
parent 50d7db0352
commit bf95944c49
2 changed files with 12 additions and 28 deletions
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28
test/test_parsing.py
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@ -137,31 +137,3 @@ class TestParser(unittest.TestCase):
def test_errors(self): def test_errors(self):
self.assertRaises(ValueError, parse_path, 'M 100 100 L 200 200 Z 100 200') self.assertRaises(ValueError, parse_path, 'M 100 100 L 200 200 Z 100 200')
def test_roundoff(self):
"""Paths with arc segments may have floating point round-off issues"""
path1 = parse_path("""
M160.172,102.95
L159.922,102.95
A0.025,0.025 0 0,1 159.897,102.925
L159.897,102.675
A0.025,0.025 0 0,1 159.922,102.65
L160.172,102.65
A0.025,0.025 0 0,1 160.197,102.675
L160.197,102.925
A0.025,0.025 0 0,1 160.172,102.95""")
path2 = Path(Line(start=(160.172 + 102.95j), end=(159.922 + 102.95j)),
Arc(start=(159.922 + 102.95j), radius=(0.025 + 0.025j), rotation=0.0,
large_arc=False, sweep=True, end=(159.897 + 102.925j)),
Line(start=(159.897 + 102.925j), end=(159.897 + 102.675j)),
Arc(start=(159.897 + 102.675j), radius=(0.025 + 0.025j), rotation=0.0,
large_arc=False, sweep=True, end=(159.922 + 102.65j)),
Line(start=(159.922 + 102.65j), end=(160.172 + 102.65j)),
Arc(start=(160.172 + 102.65j), radius=(0.025 + 0.025j), rotation=0.0,
large_arc=False, sweep=True, end=(160.197 + 102.675j)),
Line(start=(160.197 + 102.675j), end=(160.197 + 102.925j)),
Arc(start=(160.197 + 102.925j), radius=(0.025 + 0.025j), rotation=0.0,
large_arc=False, sweep=True, end=(160.172 + 102.95j)))
self.assertEqual(path1, path2)

12
test/test_path.py
View File

@ -353,6 +353,18 @@ class QuadraticBezierTest(unittest.TestCase):
class ArcTest(unittest.TestCase): class ArcTest(unittest.TestCase):
def test_trusting_acos(self):
"""`u1.real` is > 1 in this arc due to numerical error."""
try:
a1 = Arc(start=(160.197+102.925j),
radius=(0.025+0.025j),
rotation=0.0,
large_arc=False,
sweep=True,
end=(160.172+102.95j))
except ValueError:
self.fail("Arc() raised ValueError unexpectedly!")
def test_points(self): def test_points(self):
arc1 = Arc(0j, 100 + 50j, 0, 0, 0, 100 + 50j) arc1 = Arc(0j, 100 + 50j, 0, 0, 0, 100 + 50j)
self.assertAlmostEqual(arc1.center, 100 + 0j) self.assertAlmostEqual(arc1.center, 100 + 0j)