Created
July 29, 2025 10:00
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| from datetime import date, timedelta | |
| def today(): | |
| return date.today() | |
| def given_policy(started_days_ago=0, premium=1000, grace_period_days=14): | |
| start_date = today() - timedelta(days=started_days_ago) | |
| return InsurancePolicy(start_date=start_date, premium=premium, grace_period_days=grace_period_days) | |
| def when_policy_is_cancelled(policy, cancelled_days_after_start): | |
| cancel_date = policy.start_date + timedelta(days=cancelled_days_after_start) | |
| policy.cancel(on=cancel_date) | |
| return policy | |
| def when_claim_is_made(policy, amount=100): | |
| policy.submit_claim(amount=amount) | |
| return policy | |
| def then_refund_should_be(policy, expected_amount): | |
| assert policy.refund_amount() == expected_amount | |
| def test_full_refund_when_cancelled_during_grace_period_and_no_claims(): | |
| policy = given_policy(started_days_ago=0, premium=500) | |
| policy = when_policy_is_cancelled(policy, cancelled_days_after_start=10) | |
| then_refund_should_be(policy, expected_amount=500) | |
| def test_partial_refund_when_cancelled_after_grace_period_and_no_claims(): | |
| policy = given_policy(started_days_ago=0, premium=1200) | |
| policy = when_policy_is_cancelled(policy, cancelled_days_after_start=30) | |
| expected = policy.calculate_unused_premium(up_to=policy.cancelled_on) | |
| then_refund_should_be(policy, expected_amount=expected) | |
| def test_no_refund_when_cancelled_after_claims_made(): | |
| policy = given_policy(started_days_ago=0, premium=500) | |
| policy = when_claim_is_made(policy) | |
| policy = when_policy_is_cancelled(policy, cancelled_days_after_start=5) | |
| then_refund_should_be(policy, expected_amount=0) |
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here, an interesting article (2019) but still interesting to read:
https://medium.com/javascript-scene/behavior-driven-development-bdd-and-functional-testing-62084ad7f1f2