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node_modules/@vitest/expect/README.md

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+# @vitest/expect
+
+[![NPM version](https://img.shields.io/npm/v/@vitest/runner?color=a1b858&label=)](https://npmx.dev/package/@vitest/runner)
+
+Jest's expect matchers as a Chai plugin.
+
+## Usage
+
+```js
+import {
+  JestAsymmetricMatchers,
+  JestChaiExpect,
+  JestExtend,
+} from '@vitest/expect'
+import * as chai from 'chai'
+
+// allows using expect.extend instead of chai.use to extend plugins
+chai.use(JestExtend)
+// adds all jest matchers to expect
+chai.use(JestChaiExpect)
+// adds asymmetric matchers like stringContaining, objectContaining
+chai.use(JestAsymmetricMatchers)
+```
+
+[GitHub](https://github.com/vitest-dev/vitest/tree/main/packages/expect) | [Documentation](https://vitest.dev/api/expect)