11 posts tagged with "arbitrary"

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.

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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 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.

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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.

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

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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.

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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.

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This release introduces some new opt-in options on date, dictionary and record. They open ways to detect new classes of bugs.

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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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This release comes with a new arbitrary called ulid. This arbitrary is responsible to generate ULID strings

Continue reading to explore the detailed updates it brings.