Ruleset::registerSniffs(): add tests

[jrfnl]

Description

Suggested changelog entry

N/A

Related issues/external references

This PR is part of a series of PRs expanding the tests for the Ruleset class.

[fredden]

This looks like a good addition to the test suite. Is it intentional that this code block isn't being tested?

PHP_CodeSniffer/src/Ruleset.php

Lines 1332 to 1335 in 0d969c9

	$slashPos = strrpos(substr($file, 0, $sniffPos), DIRECTORY_SEPARATOR);
	if ($slashPos === false) {
	continue;
	}

I understand that the 'if verbose echo' code at the end of the loop isn't feasibly testable right now and there are plans to make it so later on.

[jrfnl]

@fredden Thanks for reviewing!

This looks like a good addition to the test suite. Is it intentional that this code block isn't being tested?

Kind of. My fantasy ran out and I couldn't come up with a (realistic) test case which managed to hit that line (I did try, but if I remember correctly, anything I tried which should hit the line, was already filtered out of the $files list before it reached the registerSniffs() method). It may actually be redundant code, but I didn't think removing it now was prudent. Let's give it a little more time, who knows, someone else may be able to come up with a valid test case for it ;-)