source: imaps-frontend/node_modules/pretty-error/test/PrettyError.coffee

chai = require 'chai'
PrettyError = require '../src/PrettyError'
defaultStyle = require '../src/defaultStyle'

chai.should()

isFormatted = (exc) ->
  exc.stack.indexOf('  \u001b[0m\u001b[97m\u001b[41m') is 0

error = (what) ->
  if typeof what is 'string'
    return error -> throw Error what

  else if what instanceof Function
    try
      do what
    catch e
      return e

  throw Error "bad argument for error"

describe "PrettyError", ->
  describe "constructor()", ->
    it "should work", ->
      new PrettyError

  describe "getObject", ->
    it "should return a string", ->
      p = new PrettyError
      p.getObject(error "hello").should.be.an 'object'

  describe "style", ->
    it "should, by default, return the contents in `default-style`", ->
      p = new PrettyError
      p.style.should.eql defaultStyle()

    it "should return different contents after appending some styles", ->
      p = new PrettyError
      p.appendStyle 'some selector': 'display': 'block'
      p.style.should.not.eql defaultStyle()

  describe "render()", ->
    it "should work", ->
      p = new PrettyError
      p.skipNodeFiles()
      p.appendStyle 'pretty-error': marginLeft: 4

      e = error -> "a".should.equal "b"
      console.log p.render e, no

      e2 = error -> Array.split(Object)
      console.log p.render e2, no

      e3 = "Plain error message"
      console.log p.render e3, no

      e4 =
        message: "Custom error message"
        kind: "Custom Error"

      console.log p.render e4, no

      e5 =
        message: "Error with custom stack"
        stack: ['line one', 'line two']
        wrapper: 'UnhandledRejection'

      console.log p.render e5, no

      e6 = error -> PrettyError.someNonExistingFuncion()
      console.log p.render e6, no

    it.skip "should render without colors if pe._useColors is false", ->
      p = new PrettyError
      p.withoutColors()
      p.skipNodeFiles()
      p.appendStyle 'pretty-error': marginLeft: 4

      e = error -> "a".should.equal "b"
      console.log p.render e, no

  describe "start()", ->
    prepareStackTrace = null

    beforeEach ->
      {prepareStackTrace} = Error
      Error.prepareStackTrace = null

    afterEach ->
      Error.prepareStackTrace = prepareStackTrace

    it "throws unformatted error when not started", ->
      try
        throw new Error "foo bar"
      catch exc

      isFormatted(exc).should.be.eql false

    it "throws formatted the error", ->
      PrettyError.start()

      try
        throw new Error "foo bar"
      catch exc

      isFormatted(exc).should.be.eql true
      exc.stack.split(/\n/g).length.should.be.above 2

      PrettyError.stop()