jest-matcher-specific-error

Make sure your function really throws what you expect

Workaround for https://github.com/facebook/jest/issues/8140

Installation

With npm:
> npm install --save-dev jest-matcher-specific-error

With yarn:
> yarn add -D jest-matcher-specific-error

Setup

Same as Other jest matchers

Usage

``typescript
await expect(yourPromise).rejects.toMatchError(expectedError);
await expect(yourFunction).rejects.toMatchError(expectedError);
expect(yourError).toMatchError(expectedError);
`

Match logic

Errors threated as equal if ALL conditions satisfied:
* Errors are instances of same class (strict === comparison by reference)
* Error messages are equal
* All error public fields are deeply equal (default jest` helper comparison)

Error stack traces are ignored.