exists() requires a message or else QUnit complains

[DesignByOnyx]

If exists() is the only test which runs and a message is omitted, QUnit will complain that at least 1 assertion was expected.

QUnit.test("The input exists", function () {
    F("input").exists();
});

The following will report that 1 assertion was successful:

QUnit.test("The input exists", function () {
    F("input").exists('The input exists');
});

[matthewp]

This is by design. Some times you need to use things like .exists() for control-flow, adding a message is how you tell FuncUnit that this .exists() is an assertion.

[daffl]

It is documented as optional parameters though.