Stress testing Biome's noFloatingPromises lint rule
Vercel partnered with the Biome team to help stress test their noFloatingPromises lint rule, which prevents unhandled Promises that can cause silent errors. The team ran an internal competition to find edge cases and improve test coverage for this important linting capability.
Recently we with the team to strengthen their to catch more subtle edge cases. This rule prevents unhandled Promises, which can cause silent errors and unpredictable behavior. Once Biome had an early version ready, they asked if we could help stress test it with some test cases.partneredBiomelint rulenoFloatingPromises
At Vercel, we know good tests require creativity just as much as attention to detail. To ensure strong coverage, we wanted to stretch the rule to its limits and so we thought it would be fun to turn this into a friendly internal competition. Who could come up with the trickiest examples that would still break the updated lint rule?
Part of the fun was learning together, but before we dive into the snippets, let’s revisit what makes a Promise “float”.
Source: original entry ↗
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