03/01: polish the Matchers explanation

kettanaito · kettanaito · commit cc4181c9aa54 · 2025-08-28T21:27:20.000+02:00
diff --git a/exercises/03.assertions/01.solution.custom-matchers/README.mdx b/exercises/03.assertions/01.solution.custom-matchers/README.mdx
@@ -38,9 +38,7 @@ declare module 'vitest' {
 }
 ```
 
-This is the interface from `vitest` that I extend using module augmentation:
-
-- `Matchers<T>`, which controls the matchers returned by calling `expect()` and annotates the matcher declarations passed to `expect.extend()`.
+Here, I'm augmenting the `Matchers` type from `vitest` with my custom `CustomMatchers` type. By doing so, I'm extending the type definitions for the `expect()` function as well as the argument type of `expect.extend()` for later.
 
 This is enough for the `.toMatchSchema()` custom matcher to be recognized by TypeScript:
 

Original file line number	Diff line number	Diff line change
`@@ -38,9 +38,7 @@ declare module 'vitest' {`
`38`	`38`	`}`
`39`	`39`	```
`40`	`40`
`41`		-This is the interface from `vitest` that I extend using module augmentation:
`42`		`-`
`43`		-- `Matchers<T>`, which controls the matchers returned by calling `expect()` and annotates the matcher declarations passed to `expect.extend()`.
	`41`	+Here, I'm augmenting the `Matchers` type from `vitest` with my custom `CustomMatchers` type. By doing so, I'm extending the type definitions for the `expect()` function as well as the argument type of `expect.extend()` for later.
`44`	`42`
`45`	`43`	This is enough for the `.toMatchSchema()` custom matcher to be recognized by TypeScript:
`46`	`44`