Renamed testProvider() to ExceptionProvider().
And updated docblock
Removed testAuthNoAuth() as it was useless.

$this->any() could be changed to $this->never() and still work.
If using $this->once() it failed, as write() never was triggered.
ResultSetTest now tests that the result is kept.
Asserting "hack" to avoid "Risky" test result.
(When the test was made, it was throwing an error, it isn't anymore :))
Test flash message with custom id.