From bf95944c49e82baa13a0a9ff36d00b40693f8c11 Mon Sep 17 00:00:00 2001
From: Andy <andyaport@gmail.com>
Date: Tue, 26 Dec 2017 00:57:48 -0500
Subject: [PATCH] moved test for checking if `Arc()` throws `acos` domain error
 due to numerical error

---
 test/test_parsing.py | 28 ----------------------------
 test/test_path.py    | 12 ++++++++++++
 2 files changed, 12 insertions(+), 28 deletions(-)

diff --git a/test/test_parsing.py b/test/test_parsing.py
index 3cdcfc2..c052ad8 100644
--- a/test/test_parsing.py
+++ b/test/test_parsing.py
@@ -137,31 +137,3 @@ class TestParser(unittest.TestCase):
 
     def test_errors(self):
         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)
diff --git a/test/test_path.py b/test/test_path.py
index e69499b..3456e82 100644
--- a/test/test_path.py
+++ b/test/test_path.py
@@ -353,6 +353,18 @@ class QuadraticBezierTest(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):
         arc1 = Arc(0j, 100 + 50j, 0, 0, 0, 100 + 50j)
         self.assertAlmostEqual(arc1.center, 100 + 0j)