Side Bar Pro Tip: Avoid Spagetti Code

• Take advantage of PHPUnit's bailing
• Do NOT do conditional test execution

public function test_error() {
    $actual = get_given_value(FALSE);

    // $actual is FALSE.  Method execution stops.
    $this->assertTrue($actual);

    // Hey test authors, for heaven's sake, don't write tests like this...
    if ($actual) {
        $other = do_something_with_result($actual);
        $this->assertTrue($other);
    }
}