def test_simple():
plan = PaymentPlanFactory(
deposit=20,
count=2,
interval=1
)
total = Decimal('100')
# deposit
assert Decimal('20') == plan.deposit_amount(total)
# instalments
deposit_due_date = date(2015, 1, 2)
result = plan.instalments(deposit_due_date, total)
assert [
(deposit_due_date + relativedelta(months=+1, day=1), Decimal('40')),
(deposit_due_date + relativedelta(months=+2, day=1), Decimal('40')),
] == result
def test_illustration_awkward():
plan = PaymentPlanFactory(
deposit=50,
count=3,
interval=2
)
total = Decimal('200')
# deposit
assert Decimal('100') == plan.deposit_amount(total)
# instalments
deposit_due_date = date(2015, 1, 2)
result = plan.instalments(deposit_due_date, total)
assert [
(deposit_due_date + relativedelta(months=+2, day=1), Decimal('33.33')),
(deposit_due_date + relativedelta(months=+4, day=1), Decimal('33.33')),
(deposit_due_date + relativedelta(months=+6, day=1), Decimal('33.34')),
] == result
def test_illustration_typical():
plan = PaymentPlanFactory(
deposit=15,
count=6,
interval=1
)
total = Decimal('600')
# deposit
assert Decimal('90') == plan.deposit_amount(total)
# instalments
deposit_due_date = date(2015, 1, 22)
result = plan.instalments(deposit_due_date, total)
assert [
(deposit_due_date + relativedelta(months=+2, day=1), Decimal('85')),
(deposit_due_date + relativedelta(months=+3, day=1), Decimal('85')),
(deposit_due_date + relativedelta(months=+4, day=1), Decimal('85')),
(deposit_due_date + relativedelta(months=+5, day=1), Decimal('85')),
(deposit_due_date + relativedelta(months=+6, day=1), Decimal('85')),
(deposit_due_date + relativedelta(months=+7, day=1), Decimal('85')),
] == result