def __init__(self, normal, offset):
super().__init__()
normal = Vector.convert(normal, "normal", required_length=3)
if normal.is_zero:
raise ValueError("Normal vector is zero")
offset = number.convert(offset, "offset")
self._normal = normal
self._offset = offset
def test_convert(self):
# Regular call without length check
self.assertEqual(Vector.convert(Vector(1, 2, 3), "dummy"),
Vector(1, 2, 3)) # From Vector
self.assertEqual(Vector.convert([1, 2, 3], "dummy"),
Vector(1, 2, 3)) # From list
self.assertEqual(Vector.convert((1, 2, 3), "dummy"),
Vector(1, 2, 3)) # From tuple
# Calling with a vector does not construct a new vector
v = Vector(1, 2, 3)
self.assertIs(Vector.convert(v, "dummy"), v)
# Empty
self.assertEqual(Vector.convert([], "dummy"), Vector())
# Length check
self.assertEqual(Vector.convert([1, 2, 3], "dummy", required_length=3),
Vector(1, 2, 3)) # Success
with self.assertRaises(ValueError):
Vector.convert([1, 2, 3], "dummy", required_length=4) # Failure
# Invalid values
with self.assertRaises(TypeError):
Vector.convert(None, "dummy", None)
with self.assertRaises(TypeError):
Vector.convert(1, "dummy", None)
with self.assertRaises(TypeError):
Vector.convert("", "dummy", None)
with self.assertRaises(TypeError):
Vector.convert("123", "dummy", None)
with self.assertRaises(TypeError):
Vector.convert([1, 2, "3"], "dummy", None)