# jest-expect-openapi

A [Vitest](https://vitest.dev/) and [Jest](https://jestjs.io/) custom matcher for asserting valid [OpenAPI](https://en.wikipedia.org/wiki/OpenAPI_Specification) definitions.

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## Installation

```sh
npm install jest-expect-openapi --save-dev
```

## Usage

```ts
import toBeAValidOpenAPIDefinition from 'jest-expect-openapi';
import { expect, test } from 'vitest';

expect.extend({ toBeAValidOpenAPIDefinition });

test('should be a valid OpenAPI definition', () => {
  expect(oas).toBeAValidOpenAPIDefinition();
});

test('should not be a valid OpenAPI definition', () => {
  expect(invalidOas).not.toBeAValidOpenAPIDefinition();
});
```

The usage is nearly identical in Jest:

```ts
import toBeAValidOpenAPIDefinition from 'jest-expect-openapi';

expect.extend({ toBeAValidOpenAPIDefinition });

test('should be a valid OpenAPI definition', () => {
  expect(oas).toBeAValidOpenAPIDefinition();
});

test('should not be a valid OpenAPI definition', () => {
  expect(invalidOas).not.toBeAValidOpenAPIDefinition();
});
```