def test_should_return_20_for_a_most_loyal_customer(now):
customer = Customer(
first_purchase_date=now-10*YEAR,
birth_date=now-20*YEAR,
is_veteran=False,
)
got = calculate_discount_percentage(customer)
expected = 20
assert got == expected
def test_should_return_5_for_a_senior(now):
customer = Customer(
first_purchase_date=now,
birth_date=now-65*YEAR,
is_veteran=False,
)
got = calculate_discount_percentage(customer)
expected = 5
assert got == expected
def test_should_return_10_for_veteran(now):
customer = Customer(
first_purchase_date=now,
birth_date=now-20*YEAR,
is_veteran=True,
)
got = calculate_discount_percentage(customer)
expected = 10
assert got == expected
def test_should_return_15_for_new_client(now):
customer = Customer(
first_purchase_date=None,
birth_date=now-20*YEAR,
is_veteran=False,
)
got = calculate_discount_percentage(customer)
expected = 15
assert got == expected
def test_should_return_zero_for_casual_customer(now):
customer = Customer(
first_purchase_date=now,
birth_date=now-20*YEAR,
is_veteran=False,
)
got = calculate_discount_percentage(customer)
expected = 0
assert got == expected
def test_should_return_maximum_discount(now):
customer = Customer(
first_purchase_date=None,
birth_date=now-20*YEAR,
is_veteran=True,
)
# eligible for 15% discount as a new client and 10% as a veteran
got = calculate_discount_percentage(customer)
expected = 15
assert got == expected