Logger Jest

npm version Testing codecov

Jest matchers for Logger testing.

Install

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npm install @universal-packages/logger-jest

npm install @universal-packages/logger

Setup

Add the following to your jest.config.js or where you configure Jest:

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module.exports = {
  setupFilesAfterEnv: ['@universal-packages/logger-jest']
}

Matchers

toHaveLogged

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import { Logger } from '@universal-packages/logger'

it('should logged log', async () => {
  const logger = new Logger()

  logger.log({ level: 'INFO', message: 'Hello World' })

  expect(Logger).toHaveLogged({ level: 'INFO', message: 'Hello World' })
})

toHaveLoggedTotal

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import { Logger } from '@universal-packages/logger'

it('should logged a total number of logs', async () => {
  const logger = new Logger()

  logger.log({ level: 'INFO', message: 'Hello World' })

  expect(Logger).toHaveLoggedTotal(1)
})

Typescript

In order for typescript to see the global types you need to reference the types somewhere in your project, normally ./src/globals.d.ts.

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/// <reference types="@universal-packages/logger-jest" />

This library is developed in TypeScript and shipped fully typed.

Contributing

The development of this library happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving this library.

License

MIT licensed.

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