test.js

import test from 'ava'
import devnull from 'dev-null'
import ConsoleLogFmt from './index'

const stdout = devnull()
const stderr = devnull()

test('simple info message', t => {
  const { log } = new ConsoleLogFmt({ stdout, stderr })
  t.is(log('message'), 'level=info msg=message')
})

test('simple warn message', t => {
  const { warn } = new ConsoleLogFmt({ stdout, stderr })
  t.is(warn('message'), 'level=warn msg=message')
})

test('simple error message', t => {
  const { error } = new ConsoleLogFmt({ stdout, stderr })
  t.is(error('message'), 'level=error msg=message')
})

test('log of multiple string params', t => {
  const { log } = new ConsoleLogFmt({ stdout, stderr })
  t.is(
    log('message', 'of', 'a lot of', 'words'),
    'level=info msg="message of a lot of words"'
  )
})

test('log of nested object as plain', t => {
  const { log } = new ConsoleLogFmt({ stdout, stderr })
  t.is(log({ father: { to: 'son' } }), 'level=info father_to=son')
})

test('log of multiple nested object as plain', t => {
  const { log } = new ConsoleLogFmt({ stdout, stderr })
  t.is(
    log({ father: { to: 'son', and: 'daugher' } }),
    'level=info father_to=son father_and=daugher'
  )
})

test('log of multi-level nested objects as plain', t => {
  const { log } = new ConsoleLogFmt({ stdout, stderr })
  t.is(
    log({ grand: { father: { to: 'son' } } }),
    'level=info grand_father_to=son'
  )
})