def test_number_of_pennies(self):
chg = Change(cost=4.98, amount=5.00)
chg._number_of_pennies()
assert chg.coins['penny'] == 2
def test_number_of_dimes(self):
chg = Change(cost=4.83, amount=5.00)
chg._number_of_dimes()
assert chg.coins['dime'] == 1
def test_number_of_nickels(self):
chg = Change(cost=4.91, amount=5.00)
chg._number_of_nickels()
assert chg.coins['nickel'] == 1
def test_number_of_quarters(self):
chg = Change(cost=3.83, amount=5.00)
chg._number_of_quarters()
assert chg.coins['quarter'] == 4
