suppresses thrown errors

[jake-miles]

Code that I'm testing throws an error. This error does not appear in the test output, making it difficult to determine why the test failed. It would be much more helpful if mocha always listed the stacktrace of any errors thrown during a test.

This test (along with others):

it ("creates the top-level object", function () {
var result = fillObjectTree.fillObjectTree (dataSet1, example);
result.id.should.equal (1001);
});

Produces:

✖ 17 of 58 tests failed:

0. fill_object_tree createMap fillObjectTree creates the top-level object:

1. fill_object_tree createMap fillObjectTree creates the measurableQuantity:

Note the lack of detail under the failed test.

If I wrap the test code in a try/catch, it outputs the error in the console output:

it ("creates the top-level object", function () {       
    try {
    var result = fillObjectTree.fillObjectTree (dataSet1, example);
    } catch (e) {
        log.error(e);
    }
    result.id.should.equal (1001);
    });

ERROR The provided object to fill (object) does not match the example object map's type (array) at path [.measurableQuantity.unitConversions], Error

[tj]

mocha should display exceptions thrown, not if you try/catch obviously but otherwise it will, im not sure I get what the issue is you're having, is there something I can reproduce?

[jake-miles]

Yeah, I'm unable to repro this - I've changed a number of things and something along the way fixed this problem. Part of the problem may have been that in some cases I was throwing strings instead of Error objects. If you're printing e.stack, that would of course produce no output for a string. If I hit this problem again I'll post an update.

[tj]

oh, yeah dont throw strings http://www.devthought.com/2011/12/22/a-string-is-not-an-error/, they're useless