Duplicate test fail messages for multiline strings

[lucassus]

When the assertion raises message with multiline strings in the stacktrace this message is duplicated.

For instance consider the following code snippet:

  describe('an exmaple', function() {

    it('throws', function() {
      // works fine
      throw new Error('foo');
    });

    it('throws', function() {
      // message will be duplicated
      throw new Error('foo\nbar');
    });

  });

for the first example I have nice error message:

PhantomJS 1.9.7 (Linux) Module chaiMatchers karma-mocha blows FAILED
        Error: foo
            at /home/lucassus/Projects/OpenSource/glossary/test/client/spec/chaiMatchersSpec.js:73
            at callFn (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4338)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4331
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4728
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4819
            at next (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4653)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4663
            at next (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4601)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4630
            at timeslice (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:5763)

but when I'm trying to ouptup multiline message I get:

PhantomJS 1.9.7 (Linux) Module chaiMatchers karma-mocha blows FAILED
        foo
        bar
        Error: foo
        bar
            at /home/lucassus/Projects/OpenSource/glossary/test/client/spec/chaiMatchersSpec.js:77
            at callFn (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4338)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4331
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4728
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4819
            at next (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4653)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4663
            at next (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4601)
            at /home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:4630
            at timeslice (/home/lucassus/Projects/OpenSource/glossary/node_modules/mocha/mocha.js:5763)

I have simillar results google-chrome, on firefox I don't see duplicated messagtes.
This problem affects also tests with $httpBackend, for example:

PhantomJS 1.9.7 (Linux) Controller: list.FormCtrl #submit() when the list is persisted does the magic FAILED
        Expected PUT /api/lists/123 with different data
        EXPECTED: {"foo":"bar"}
        GOT:      {"_id":123,"name":"New List Name"}
        Error: Expected PUT /api/lists/123 with different data
        EXPECTED: {"foo":"bar"}
        GOT:      {"_id":123,"name":"New List Name"}

On bare mocha everything works fine. I guess it could be related with #16

[pkozlowski-opensource]

OK, after looking into a bit the problem is that Chrome adds the error message as part of the err.stack itself, ex:

Error: foo
bar
at Context. (http://localhost:9876/base/test/foo.spec.js?c18bd8f72cdb7888f972c8a2778af80d93db0906:3:11)

There is error type as well here... Oh, joy of cross-browsers compatibility :-/

[lucassus]

On PhantomJS I have same results. Message is added as a part of the stack tace.