Karma console.log or error work differently.

[UniverseHan]

When

it('should show error message in Error Object', () => {
  console.log(new Error('This should be displayed'));
});

Expected behaviour

LOG: Error: This should be displayed
    at <anonymous>:1:13
    ...
    ...

Actual behaviour

LOG: TypeError{}

Environment Details

• Karma version (output of karma --version):
  "karma": "^1.7.1",
  "karma-chrome-launcher": "^2.2.0",
  "karma-jasmine": "^1.1.0",

• Relevant part of your karma.config.js file

Steps to reproduce the behaviour

1. Write code like below

it('Error message should be displayed', function() {
  console.log(new Error('This should be displayed'));
});

2. run karma test

$ karma start

When you log in normal nodejs app

// shouldbe.js
console.log(new TypeError('This should be displayed'));

Got this.

TypeError: This should be displayed
    at Object.<anonymous> (/Users/haseok/workspace/karma-test/expected.js:1:75)
    at Module._compile (module.js:612:30)
    at Object.Module._extensions..js (module.js:623:10)
    at Module.load (module.js:531:32)
    at tryModuleLoad (module.js:494:12)
    at Function.Module._load (module.js:486:3)
    at Function.Module.runMain (module.js:653:10)
    at startup (bootstrap_node.js:187:16)
    at bootstrap_node.js:608:3

[EzraBrooks]

Can you clarify why your "Actual behavior" section is blank? Does it not log the message at all?

[UniverseHan]

@EzraBrooks I have updated actual behaviour.

I think it caused by That karma use JSON.stringify in console.log wraper function. JSON.stringify(new Error('...')) does not display message in Error.

this issue is same as #2854

[macjohnny]

@UniverseHan can you retry with 2.0.0? maybe this was resolved with #2712 ?