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Vector2: Add __radd__ #151

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May 25, 2019
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Vector2: Add __radd__ #151

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cd0cfa2
Vector2: Add __radd__
AstraLuma May 18, 2019
6e44959
tests/addition: Test __radd__ with vector-likes
nbraud May 22, 2019
1731117
Vector2.__radd__: Avoid using dunders directly
nbraud May 22, 2019
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3 changes: 3 additions & 0 deletions ppb_vector/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -183,6 +183,9 @@ def __add__(self, other: VectorLike) -> 'Vector':

return Vector(self.x + other_x, self.y + other_y)

def __radd__(self, other: VectorLike) -> 'Vector':
return self + other

def __sub__(self, other: VectorLike) -> 'Vector':
"""Subtract one vector from another.

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8 changes: 8 additions & 0 deletions tests/test_addition.py
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@@ -1,6 +1,8 @@
import pytest # type: ignore
from hypothesis import given

from ppb_vector import Vector
from utils import vector_likes, vectors


def test_addition_vectors():
Expand Down Expand Up @@ -47,3 +49,9 @@ def test_addition_vector_dict():
@pytest.mark.parametrize("test_input, expected", data)
def test_multiples_values(test_input, expected):
assert (test_input[0] + test_input[1]) == expected


@given(x=vectors(), y=vectors())
def test_addition_reverse(x: Vector, y: Vector):
for y_like in vector_likes(y):
assert y_like + x == x + y