Running your full test suite sequentially in CI is wasted time. ExUnit has built-in support for partitioning — split your suite into N slices and run ...
almirsarajcic
11 hours ago
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`assign_new/3` prevents expensive recomputations in LiveView
Calling assign/2 recalculates values every time the socket updates, even if the data hasn't changed. Use assign_new/3 to compute expensive operations ...
almirsarajcic
7 days ago
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Req ships with a built-in test stub mechanism. No Bypass, no Mox, no additional dependencies — just three small changes and your HTTP calls never hit ...
almirsarajcic
14 days ago
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Nested case statements for operations that can fail look neat at first — until you need three of them. with lets you sequence failable operations and ...
almirsarajcic
21 days ago
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Marking a test module async: false serializes every test inside it. If only two tests genuinely need it — because they touch a globally-named Task.Sup...
almirsarajcic
28 days ago
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We've moved to almost fully autonomous AI-driven development and rely less on human code review. We're pushing more into Credo — mechanical rules that...
almirsarajcic
28 days ago
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Application.put_env/3 in tests mutates global state. Two concurrent tests overwriting the same key will race — the restore in on_exit runs after the o...
almirsarajcic
1 month ago
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If you've used mix phx.gen.auth, you've already seen Phoenix.Token at work — it's what powers the email verification and password reset links in the g...
almirsarajcic
1 month ago
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Nested case statements for operations that can fail look neat at first — until you need three of them. with lets you sequence failable operations and ...
almirsarajcic
1 month ago
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`Repo.stream/2` processes database results without loading all rows
Exporting a million database rows? Repo.all/2 loads everything into memory first. Repo.stream/2 uses database cursors to fetch rows in batches, keepin...
almirsarajcic
1 month ago
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Sometimes a job isn't ready to run yet — a third-party API is rate-limiting you, a resource hasn't been created, or you just need to wait a few minute...
almirsarajcic
2 months ago
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Use `Integer.parse/1` for params, not `String.to_integer/1`
Phoenix does zero automatic type coercion. Every value in params arrives as a string — or not at all. Reaching for String.to_integer/1 on user-supplie...
almirsarajcic
2 months ago
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