def test_fractions_by_items_01_next_step():
"""Is this Product's calculation's next step correct?"""
p = Product([
Fraction((Item(3), Item(5))),
Item(8),
Fraction((Item(7), Item(11))),
Item(4),
Fraction((Item(13), Item(17)))
])
assert p.calculate_next_step().printed == \
wrap_nb('\\frac{3\\times 8\\times 7\\times 4\\times 13}{5\\times 11'
'\\times 17}')
def test_product_neg10x_next_step():
"""Is this Product's calculation's next step correct?"""
p = Product([Monomial(('-', 10, 1))])
p.set_exponent(2)
assert p.calculate_next_step().printed == wrap_nb('100x^{2}')
def test_fraction_by_item_02_next_step():
"""Is this Product's calculation's next step correct?"""
p = Product([Item(8), Fraction((Item(5), Item(7)))])
assert p.calculate_next_step().printed == wrap_nb('\\frac{8\\times 5}{7}')
def test_fractions_product_next_step_01():
"""Is the next calculation's step of this Product correct?"""
p = Product([Fraction(('+', -3, -2)), Fraction(('+', -1, 5))])
assert p.calculate_next_step().printed == \
wrap_nb('-\\frac{3\\times 1}{2\\times 5}')