Feature: An opposite version of `expect`

[Bennie Copeland]

Is there a way to test that an exception is NOT thrown? Right now, I'm using:

it["will not throw an excpection"] = () => { };

It works... there is the exception text in red at the bottom of the console output, but the test itself remains green. We can add this to my list of things to implement when I find the time.

[Bennie Copeland]

I think this somewhat ties into issue #135 since what I'm looking for is the example to show red when the act throws an exception (or really any setup).

[Giuseppe Piscopo]

@BennieCopeland PR #192 has been merged just in these days. There were some inconsistencies when an exception was thrown in some of the hooks and that also led to what you noticed (the exception was actually reported in the final summary as well as failure count, but the test itself remained green).

I think we fixed such behaviour with that PR, so I'm wondering if expectNoExceptions is still really needed. If you temporarily edit describe_expecting_no_exception_in_act and replace expectNoExceptions with () => { }, you can see that the TestCase fails only because of the message: it expects a failure due to "example" but instead it finds a failure due to "context". Which makes sense I guess, given that the error is not happening within the it block, but in a previous (act) hook.

Any thought?

[Amir Rajan]

May be worth looking at this code example too.

[Bennie Copeland]

@GiuseppePiscopo If the behavior has changed to fail the tests when a beforeEach/beforeAll/act throws an exception, then yes, I agree this is no longer needed.

[Giuseppe Piscopo]

Yes, it has definitely changed. As a matter of fact now, with the test cases you added, replacing expectNoExceptions with () => { }:

• should_be_one_failure passes
• passes_if_no_exception_thrown passes
• rethrows_the_exception_from_act fails because of the different message. That is consistent, for me, and I'd alter this expectation to make it pass.

Thanks for your feedback