Just like bunit, suite.js should work in Browser too.

Since annofuzz deals with that now, no need to have it here as well.

There should be a way to test exception. Likely the nicest way to do this is to piggyback on the existing syntax and implement a wrapper that assert the exception was triggered. Example:

suite(func, [
    1, exception(AssertionError),
    'foo', 'foo'
]);

Now async tests just call done callback (last param). It might be nice to have some alternatives.

I think the syntax might need some work as well. I'm not too happy about the async flag. Instead I think something like this would look nicer:

suite(async(func), [
    1, 1,
    'foo', 'foo'
    [[1, 2, 3]], [1, 2, 3]
]);

Implementation-wise async helper is just a function that returns a function that returns the passed value. It also attaches some metadata (a property) to the function that marks the testcase as an async one. The test runner is then able to use this data.

This looks nicer but still might not be ideal.

The tool should output TAP compatible stream. Use "tap-render" for this purpose.