Gio Lodi • 6/4/2021

How to write better tests for Swift date comparisons

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This article discusses the challenges of testing Swift code involving date comparisons, highlighting issues like time zones, leap years, and non-deterministic tests. It provides a practical solution by refactoring code to inject a reference date, making tests reliable and independent of the system clock, with examples for promo code expiration logic.

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#unit testing #test isolation #Date Handling
How to write better tests for Swift date comparisons

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