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# This test code was written by the `hypothesis.extra.ghostwriter` module
# and is provided under the Creative Commons Zero public domain dedication.
import operator
import unittest
from hypothesis import given, strategies as st
# TODO: replace st.nothing() with an appropriate strategy
class TestBinaryOperationmul(unittest.TestCase):
mul_operands = st.nothing()
@given(a=mul_operands, b=mul_operands, c=mul_operands)
def test_associative_binary_operation_mul(self, a, b, c):
left = operator.mul(a, operator.mul(b, c))
right = operator.mul(operator.mul(a, b), c)
self.assertEqual(left, right)
@given(a=mul_operands, b=mul_operands)
def test_commutative_binary_operation_mul(self, a, b):
left = operator.mul(a, b)
right = operator.mul(b, a)
self.assertEqual(left, right)
@given(a=mul_operands)
def test_identity_binary_operation_mul(self, a):
identity = 1
self.assertEqual(a, operator.mul(a, identity))
self.assertEqual(a, operator.mul(identity, a))
@given(a=mul_operands, b=mul_operands, c=mul_operands)
def test_add_distributes_over_binary_operation_mul(self, a, b, c):
left = operator.mul(a, operator.add(b, c))
ldist = operator.add(operator.mul(a, b), operator.mul(a, c))
self.assertEqual(ldist, left)
right = operator.mul(operator.add(a, b), c)
rdist = operator.add(operator.mul(a, c), operator.mul(b, c))
self.assertEqual(rdist, right)
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