Supporting shrink is crucial for the built-in arbitraries in fast-check. For this release, we deeply reworked entityGraph to give it built-in shrinking support. But this release is above all about performance. We spent the last few weeks tracking any optimization that we could put into fast-check on its critical and hot code paths.
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Until now, stringMatching had no built-in way to cap the length of the produced strings except applying a manual post-filter on the generated values. This release adds a maxLength constraint to ensure that values stay within bounds by construct without relying on excessive and costly filtering.
Our published bundle is also lighter by 17% as it went from 1618 kB to 1344 kB.
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Dealing with potentially infinite data structures can quickly lead to memory issues. Up until now, the arbitrary responsible for generating infinite streams was keeping every generated element in memory for debugging and reporting purposes. While helpful, this behavior could cause unwanted memory growth when users pulled from these streams for a long time. This release introduces a way to avoid that intentional leak.
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The previous release introduced the unit concept to the string arbitraries, enhancing control over string generation. In version 3.23.0, we’ve extended this feature to even more arbitraries, broadening its applicability. This update also includes several performance optimizations to make your testing faster and more efficient.
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This release exposes additional details regarding the random generator passed to the property. It unlocks the ability to delegate random value generation in the workers in the context of @fast-check/worker.
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This release makes fc.pre safer in terms of typings. It leverages the "assertion function" capability offered by TypeScript. This version has also been focused on preparing the monorepo to move to ECMAScript modules to build itself and on making our documentation better.
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This release changes the way we import type-only files internally in fast-check. While it should not have any visible impact on our clients we preferred to make it a minor.
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This release introduces performance optimizations for float, double and ulid, along with the ability to define ranges with excluded boundaries for float and double.
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