25 lines
700 B
Python
25 lines
700 B
Python
# requires: pytest
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"""人工补充的边界测试：AI 第一版代码在“优惠券大于金额”时返回了负数，这些测试把它拦了下来。"""
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from decimal import Decimal
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import pytest
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from pricing import final_price
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def test_normal():
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assert final_price(Decimal("100"), Decimal("10"), vip=False) == Decimal("90.00")
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def test_vip_rounding():
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assert final_price(Decimal("10.01"), Decimal("0"), vip=True) == Decimal("9.51")
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def test_coupon_larger_than_amount():
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assert final_price(Decimal("5"), Decimal("10"), vip=True) == Decimal("0.00")
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def test_negative_rejected():
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with pytest.raises(ValueError):
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final_price(Decimal("-1"), Decimal("0"), vip=False)
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