blips/src/utils/__tests__/isType.js

State management for the GraphQL heads

import { isType, } from '../isType'

describe('isType', () => {
  test('performs correctly :)', () => {
    expect(isType('number', 1)).toBeTruthy()
    expect(isType('string', 'foo')).toBeTruthy()
    expect(isType('object', {})).toBeTruthy()
    expect(isType('array', [])).toBeTruthy()
    expect(isType('function', () => {})).toBeTruthy()
    expect(isType('error', new Error())).toBeTruthy()
    expect(isType('set', new Set())).toBeTruthy()
    expect(isType('map', new Map())).toBeTruthy()
    expect(isType('symbol', Symbol('foo'))).toBeTruthy()
    expect(isType('undefined')).toBeTruthy()
    expect(isType('null', null)).toBeTruthy()
    expect(isType('boolean', false)).toBeTruthy()
    expect(isType('promise', Promise.resolve('foo'))).toBeTruthy()

    expect(isType('number', '1')).toBeFalsy()
    expect(isType('object', [])).toBeFalsy()
    expect(isType('object', new Error())).toBeFalsy()
    expect(isType('object', new Set())).toBeFalsy()
    expect(isType('object', new Map())).toBeFalsy()
    expect(isType('string', false)).toBeFalsy()
  })

  test('It ignores case', () => {
    expect(isType('Number', 1)).toBeTruthy()
    expect(isType('StRiNg', 'foo')).toBeTruthy()
    expect(isType('OBJECT', {})).toBeTruthy()
    expect(isType('Array', [])).toBeTruthy()
    expect(isType('Function', () => {})).toBeTruthy()
    expect(isType('Error', new Error())).toBeTruthy()
    expect(isType('Set', new Set())).toBeTruthy()
    expect(isType('Map', new Map())).toBeTruthy()
    expect(isType('Symbol', Symbol('foo'))).toBeTruthy()
    expect(isType('Undefined')).toBeTruthy()
    expect(isType('Null', null)).toBeTruthy()
    expect(isType('Boolean', false)).toBeTruthy()
    expect(isType('Promise', Promise.resolve('foo'))).toBeTruthy()
  })
})