import { describe, expect, it } from '@jest/globals'
import findIndex from './findIndex.js'

describe('findIndex', () => {
  it('should return index of an object in an array, that matches a predicate', () => {
    const arr = [
      { name: 'foo' },
      { name: 'bar' },
      { name: '123' },
    ]
    const index = findIndex(arr, item => item.name === 'bar')
    expect(index).toEqual(1)
  })

  it('should return -1 when no object in an array matches a predicate', () => {
    const arr = [
      { name: 'foo' },
      { name: 'bar' },
      { name: '123' },
    ]
    const index = findIndex(arr, item => item.name === 'hello')
    expect(index).toEqual(-1)
  })
})