test for errors/exceptions

[sebs]

The testing for a Method to cause a error would be nice, some methods do raise errors/exceptions (validation for example), and testing for them could help avoid people writing boilerplate to simulate this.

[sebs]

assert.exceptionRaised, assert.error could be names for the assert

[tj]

I think im going to keep assert libs out of mocha, so people can use should.js, or a browser variant that I'll have, or assert.js etc, which is another reason to keep processing serial

[c4milo]

I think that's a great idea. +1