PHPUnit_Framework_TestResult::beStrictAboutOutputDuringTests PHP Method

    public function beStrictAboutOutputDuringTests($flag)
    {
        if (!is_bool($flag)) {
            throw PHPUnit_Util_InvalidArgumentHelper::factory(1, 'boolean');
        }
        $this->beStrictAboutOutputDuringTests = $flag;
    }