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1448 fix(sales): remove inconsistency in expected output
also clarify why small discrepancies can appear in results
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@ -41,10 +41,12 @@ impl Cart {
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### Example
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```
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[1.23, 3.12, 23.1]` => `[1.17, 2.98, 22.07]
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[1.23, 3.12, 23.1]` => `[1.17, 2.98, 22.06]
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```
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Because `1.17 + 2.98 + 22.07` == `0 + 3.12 + 23.1`
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Because `1.17 + 2.98 + 22.06` == `0 + 3.12 + 23.1`
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Floats are rounded with a precision of two decimals which can create small discrepancies as per the example above.
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This is a percentage calculation, and it can be applied to a set of three items. If the client purchases 9 items, they will receive three for free, with the discount applied to all items.
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@ -92,7 +94,7 @@ And its output:
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$ cargo run
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Store { products: [("product A", 1.23), ("product B", 23.1), ("product C", 3.12)] }
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[1.17, 2.98, 22.06]
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Cart { items: [("product A", 1.23), ("product B", 23.1), ("product C", 3.12)], receipt: [1.17, 2.98, 22.07] }
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Cart { items: [("product A", 1.23), ("product B", 23.1), ("product C", 3.12)], receipt: [1.17, 2.98, 22.06] }
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$
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```
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