def test_product_sum_2_3x_times_sum_minus4_6x_is_not_reducible():
"""Is this Product not reducible?"""
p = Product([
Sum([Item(2), Monomial(('+', 3, 1))]),
Sum([Item(-4), Monomial(('+', 6, 1))])
])
assert not p.is_reducible()
def test_2_by_1_is_reducible():
"""Is Product([Item(2), (Item(1))]) reducible?"""
p = Product([Item(2), (Item(1))])
p.set_compact_display(False)
assert p.is_reducible()
def test_1_by_7x_is_reducible():
"""Is Product([Item(1), (Monomial((7, 1)))]) reducible?"""
p = Product([Item(1), (Monomial((7, 1)))])
p.set_compact_display(False)
assert p.is_reducible()
def test_a_by_negb_bis_is_reducible():
"""Is this Product reducible?"""
p = Product([Item('a'), Item(('+', "-b", 1))])
p.set_compact_display(False)
assert p.is_reducible()