Release Notes

This page lists breaking changes and notable new features. Please be sure to read the release notes before upgrading from previous version.

TSTyche 6.0

TSTyche 6.0 ships with a major rewrite of the .toBe() matcher. The new implementation compares types by checking their structure. Previously, the internal .isTypeIdenticalTo() method of the type checker was used, but that approach will not work with TypeScript 7. The rewrite ensures TSTyche can support TypeScript 7 in the future (to follow updates, subscribe to issue #443 ).

Requirements

TypeScript Versions

Matchers

.toBe()

The new implementation of .toBe() brings several improvements to the matcher. Now it considers the following types as identical:

• { a: string } & { b: number } and { a: string; b: number };
• ((a: string) => string) & ((b: number) => number) and { (a: string): string; (b: number): number };
• ({ a: string } | { b: number }) & ({ a: string } | { b: number }) and { a: string } | { a: string; b: number } | { b: number }.

Previously ignored, this parameters, const type parameters or NoInfer markers are now taken into account:

• (this: unknown) => void is not () => void;
• <const T>(arg: T) => T is not <T>(arg: T) => T;
• <T>(arg: NoInfer<T>) => T is not <T>(arg: T) => T.

Plugins