const fibonacci = require('./fibonacci')

describe('fibonacci', () => {
  test('4th fibonacci number is 3', () => {
    expect(fibonacci(4)).toBe(3)
  })
  test('6th fibonacci number is 8', () => {
    expect(fibonacci(6)).toBe(8)
  })
  test('10th fibonacci number is 55', () => {
    expect(fibonacci(10)).toBe(55)
  })
  test('15th fibonacci number is 610', () => {
    expect(fibonacci(15)).toBe(610)
  })
  test('25th fibonacci number is 75025', () => {
    expect(fibonacci(25)).toBe(75025)
  })
  test('doesn\'t accept negatives', () => {
    expect(fibonacci(-25)).toBe('OOPS')
  })
  test('DOES accept strings', () => {
    expect(fibonacci('1')).toBe(1)
  })
  test('DOES accept strings', () => {
    expect(fibonacci('2')).toBe(1)
  })
  test('DOES accept strings', () => {
    expect(fibonacci('8')).toBe(21)
  })
})