17 posts tagged with "what's new"

With fast-check, reliability has always been at the heart of our mission. We strive to detect bugs that are not only rare but also extremely complex. With this release, we're making our scheduler even more effective — especially in scenarios that can realistically occur in production codebases. Our goal is for the scheduler to suggest as many execution orderings as possible, helping you surface those sneaky race conditions with confidence.

Continue reading to explore the detailed updates it brings.

The release of fast-check 4.0.0 marks the end of the 3.x series. With this new version, we've streamlined and refined our APIs, embraced modern standards, and removed unnecessary polyfills to enhance performance and maintainability.

Continue reading to explore the detailed updates it brings.

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.

Continue reading to explore the detailed updates it brings.

This release extends string capabilities to generate not only printable ASCII characters but also a wider range of values, finely definable by the user. It also includes several deprecations.

Continue reading to explore the detailed updates it brings.

This release introduces support for UUIDs version 6 to 15. It also extends uuid to allow specifying a single version or a set of versions.

Continue reading to explore the detailed updates it brings.

This release introduces new arbitraries to enhance shrinking capabilities and deprecates the noShrink and noBias methods in favor of these new arbitraries.

Continue reading to explore the detailed updates it brings.

This release introduces new opt-in options for objects arbitraries such as anything, object, json and jsonValue. These options provide more elegant and shorter ways to produce objects with non-ASCII keys and values.

Continue reading to explore the detailed updates it brings.

This release introduces some new opt-in options on floating point number arbitraries such as float and double. They offer simpler ways to only produce non-integer numerical values.

Continue reading to explore the detailed updates it brings.

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.

Continue reading to explore the detailed updates it brings.

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.

Continue reading to explore the detailed updates it brings.