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Testing strategy for iOS take-home
Tests in a take-home are a signal, not a coverage target. The goal is to prove judgment about what deserves testing under a time budget.
Where to spend your test budget
Concentrate tests on the core logic and the parts most likely to break: parsing and mapping, business rules, error and edge cases, and anything with tricky state. A few well-aimed tests on this code demonstrate a production mindset and let the reviewer trust the rest, which is exactly the signal they are looking for.
Where extra tests stop helping
Do not chase coverage on trivial getters, framework glue, or UI that is faster to verify by running the app. If you had to cut testing to fit the time, say so in the README and note what you would add next. That explicit reasoning about the trade-off reads as more senior than a padded but shallow test suite.
Go deeper than a summary
Share Your Screen works topics like this through in full: 75 solved Swift problems with tests, 9 real case studies, and 7 annotated mock interviews, so you rehearse the live round instead of just reading about it.
Frequently asked
How much should I test in a take-home?
Enough to prove the core logic and the risky parts work. A few focused, meaningful tests beat broad coverage of trivial code.
What if I run out of time for tests?
Test the most important logic, then note in the README what you would add with more time. Explicit trade-off reasoning signals judgment.