nanospy v1.0.0

Nano Spy

A tiny Node.js library to spy and mock methods in tests with great TypeScript support.

It will take only 6 KB in your node_modules and have 0 dependencies.

import { spyOn, restoreAll } from 'nanospy'

test.after.each(() => {
  restoreAll()
})

test('calls increase', () => {
  const spy = spyOn(counter, 'increase')
  counter.increase(5)
  assert.equal(spy.callCount, 1)
  assert.equal(spy.calls, [[5]])
})

Docs

Read full docs here.