def test21(self):
     """Verify external radii with tool crest."""
     self.assertRadii(PathThreadMilling.threadRadii(False, 20, 18, 2, 0.1),
                      (11, 9.513397))
 def test01(self):
     """Verify internal radii with tool crest."""
     self.assertRadii(PathThreadMilling.threadRadii(True, 20, 18, 2, 0.1),
                      (8, 9.113397))
 def test20(self):
     """Verify external radii."""
     self.assertRadii(PathThreadMilling.threadRadii(False, 20, 18, 2, 0),
                      (11, 9.6))
     self.assertRadii(PathThreadMilling.threadRadii(False, 20, 19, 2, 0),
                      (11, 10.3))
 def test00(self):
     """Verify internal radii."""
     self.assertRadii(PathThreadMilling.threadRadii(True, 20, 18, 2, 0),
                      (8, 9.2))
     self.assertRadii(PathThreadMilling.threadRadii(True, 20, 19, 2, 0),
                      (8.5, 9.1))