test.js

const { createFormatter } = require('./')
const test = require('ava')

const format = createFormatter()

test('merges with default formatter', (t) => {
  const customFormat = createFormatter({
    formatter: { number: (n) => -1 }
  })

  const out = customFormat({ str: 'str', val: 10 })
  t.true(out.includes('-1'))
  t.false(out.includes('10'))
  t.true(out.includes('str'))
})

test('literals', (t) => {
  t.true(format({ val: true }).includes('true'))
  t.true(format({ val: false }).includes('false'))
  t.true(format({ val: null }).includes('null'))
  t.true(format({ val: undefined }).includes('undefined'))
})

test('strings', (t) => {
  t.true(format({ val: 'hello world' }).includes('"hello world"'))
})

test('numbers', (t) => {
  t.true(format({ val: 12 }).includes('12'))
  t.true(format({ val: 12e10 }).includes('120000000000'))
  t.true(format({ val: 9.99 }).includes('9.99'))
  t.true(format({ val: -200 }).includes('-200'))
  t.true(format({ val: Infinity }).includes('Infinity'))
})

test('functions', (t) => {
  const normalFn = format({ helloWorld: () => {} })
  t.true(normalFn.includes('[Function helloWorld]'))

  const genFn = format({ helloWorld: function *() {} })
  t.true(genFn.includes('[GeneratorFunction helloWorld]'))
})

test('depth', (t) => {
  const actual = {
    a: {
      b: true,
      c: {
        d: true
      }
    }
  }

  const fmtNoDepth = format(actual, 0)
  t.true(fmtNoDepth.includes('(collapsed)'))
  t.false(fmtNoDepth.includes('b: true'))
  t.false(fmtNoDepth.includes('d: true'))

  const fmtOneLevel = format(actual, 1)
  t.true(fmtOneLevel.includes('(collapsed)'))
  t.true(fmtOneLevel.includes('b: true'))
  t.false(fmtOneLevel.includes('d: true'))
})

test('references', (t) => {
  const c = { prop: true }
  const actual = {
    a: c,
    b: c
  }

  const fmt = format(actual)
  t.true(fmt.includes('References ~a'))
})

test('circular', (t) => {
  let actual = {
    body: {
      a: true
    }
  }

  actual.body.b = actual.body

  const fmt = format(actual)
  t.true(fmt.includes('References ~body'))
})