📝 Publish release note for 3.18.0 (#4941)

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website/blog/2024-04-28-whats-new-in-fast-check-3-18-0/index.md

@@ -0,0 +1,86 @@
+---
+title: What's new in fast-check 3.18.0?
+authors: [dubzzz]
+tags: [what's new, arbitrary]
+---
+
+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.
+
+<!--truncate-->
+
+## The new `noInteger` option
+
+Floating point number arbitraries are responsible to generate any possible floating value. It goes from normal integers, to decimals but also includes special values like: -0, NaN, -∞ and +∞. Until now we offered our users built-in ways not to produce some specific values with options like `noNaN` and `noDefaultInfinity` but nothing for wider sets of values.
+
+With this release we go further and allow users to choose not to generate a wider range of values. We introduced the flag `noInteger` to allow users to drop any integer value from the set of possible values. Before this release, it used to be done in a more manual way on the user's side:
+
+```ts
+fc.double().filter((value) => !Number.isInteger(value)); // Before version 3.18.0
+```
+
+Since version 3.18.0, users can rely on the shorter and more optimized construct:
+
+```ts
+fc.double({ noInteger: true }); // Starting at version 3.18.0
+```
+
+## Better web-paths by default
+
+According to the [RFC-3986](https://www.ietf.org/rfc/rfc3986.txt) a web-path could possibly start by `//`. Unfortunately with default options, it used to never be produced by `webPath`:
+
+```ts
+fc.statistics(fc.webPath(), (p) => (p.startsWith('//') ? 'with //' : 'without //'), { numRuns: 100_000 });
+// without //..100.00%
+```
+
+The issue came from the fact that internally our generator for paths was configured in a way that prevented such paths from being built when using the default size. With the default setup, generating too many segments for a path was not feasible, thus we never obtained enough consecutive segments to construct a `//`.
+
+```ts
+fc.statistics(fc.webPath({ size: '+1' }), (p) => (p.startsWith('//') ? 'with //' : 'without //'), { numRuns: 100_000 });
+// without //..92.67%
+// with //......7.33%
+```
+
+Starting at 3.18.0, the default configuration for paths will be able to produce paths starting by `//` without having to tweak the size:
+
+```ts
+fc.statistics(fc.webPath(), (p) => (p.startsWith('//') ? 'with //' : 'without //'), { numRuns: 100_000 });
+// without //..79.75%
+// with //.....20.25%
+```
+
+## Changelog since 3.17.0
+
+The version 3.18.0 is based on version 3.17.2, but let see what's changed since 3.17.0 itself.
+
+### Features
+
+- ([PR#4917](https://github.com/dubzzz/fast-check/pull/4917)) Add option to produce non-integer on `double`
+- ([PR#4923](https://github.com/dubzzz/fast-check/pull/4923)) Add option to produce non-integer on `float`
+- ([PR#4935](https://github.com/dubzzz/fast-check/pull/4935)) Produce "//" in web paths
+
+### Fixes
+
+- ([PR#4842](https://github.com/dubzzz/fast-check/pull/4842)) Bug: Fix dual-packages hazard and types incompatibility
+- ([PR#4853](https://github.com/dubzzz/fast-check/pull/4853)) CI: Build doc with full git history
+- ([PR#4872](https://github.com/dubzzz/fast-check/pull/4872)) CI: Stop caching Jest on CI
+- ([PR#4924](https://github.com/dubzzz/fast-check/pull/4924)) CI: Enable more advanced TS flags
+- ([PR#4925](https://github.com/dubzzz/fast-check/pull/4925)) CI: Explicitly test against Node 22
+- ([PR#4926](https://github.com/dubzzz/fast-check/pull/4926)) CI: Stabilize tests of `double` on small ranges
+- ([PR#4836](https://github.com/dubzzz/fast-check/pull/4836)) Doc: Release note for 3.17.0
+- ([PR#4844](https://github.com/dubzzz/fast-check/pull/4844)) Doc: Add new contributor patroza
+- ([PR#4852](https://github.com/dubzzz/fast-check/pull/4852)) Doc: Show last update time on doc
+- ([PR#4851](https://github.com/dubzzz/fast-check/pull/4851)) Doc: Add last modified date to sitemap
+- ([PR#4868](https://github.com/dubzzz/fast-check/pull/4868)) Doc: Enhance SEO for homepage
+- ([PR#4888](https://github.com/dubzzz/fast-check/pull/4888)) Doc: Add tutorial for PBT with Jest
+- ([PR#4901](https://github.com/dubzzz/fast-check/pull/4901)) Doc: Use official doc for npm homepage
+- ([PR#4921](https://github.com/dubzzz/fast-check/pull/4921)) Performance: More optimal `noInteger` on `double`
+- ([PR#4933](https://github.com/dubzzz/fast-check/pull/4933)) Script: Switch on more eslint rules
+- ([PR#4866](https://github.com/dubzzz/fast-check/pull/4866)) Test: Safer rewrite of Poisoning E2E
+- ([PR#4871](https://github.com/dubzzz/fast-check/pull/4871)) Test: Move tests to Vitest
+- ([PR#4863](https://github.com/dubzzz/fast-check/pull/4863)) Test: Explicitely import from Vitest
+- ([PR#4873](https://github.com/dubzzz/fast-check/pull/4873)) Test: Move to v8 for coverage
+- ([PR#4875](https://github.com/dubzzz/fast-check/pull/4875)) Test: Better mock/spy cleaning
+- ([PR#4922](https://github.com/dubzzz/fast-check/pull/4922)) Test: Cover `noInteger` on `double` via integration layers