Coduo\PHPMatcher\Matcher\NullMatcher::canMatch PHP Method

    public function canMatch($pattern)
    {
        return is_null($pattern) || is_string($pattern) && 0 !== preg_match(self::MATCH_PATTERN, $pattern);
    }

 /**
  * @dataProvider negativeCanMatchData
  */
 public function test_negative_can_matches($pattern)
 {
     $matcher = new NullMatcher();
     $this->assertFalse($matcher->canMatch($pattern));
 }