public function testIsUrl()
 {
     $correctUrls = ['https://example.com', 'http://example.com', 'http://foo.com/blah_blah', 'http://foo.com/blah_blah/', 'http://foo.com/blah_blah_(wikipedia)', 'http://foo.com/blah_blah_(wikipedia)_(again)', 'http://www.example.com/wpstyle/?p=364', 'https://www.example.com/foo/?bar=baz&inga=42&quux', 'http://df.ws/123', 'http://*****:*****@example.com:8080', 'http://*****:*****@example.com:8080/', 'http://userid@example.com', 'http://userid@example.com/', 'http://userid@example.com:8080', 'http://userid@example.com:8080/', 'http://*****:*****@example.com', 'http://*****:*****@example.com/', 'http://142.42.1.1/', 'http://142.42.1.1:8080/', 'http://fg.ws/', 'http://fg.ws', 'http://foo.com/blah_(wikipedia)#cite-1', 'http://foo.com/blah_(wikipedia)_blah#cite-1', 'http://foo.com/unicode_(✪)_in_parens', 'http://foo.com/(something)?after=parens', 'http://☺.damowmow.com/', 'http://code.google.com/events/#&product=browser', 'http://j.mp', 'ftp://foo.bar/baz', 'http://foo.bar/?q=Test%20URL-encoded%20stuff', 'http://مثال.إختبار', 'http://例子.测试', 'http://उदाहरण.परीक्', "http://-.~_!\$&'()*+,;=:%40:80%2f::::::@example.com", 'http://1337.net', 'http://a.b-c.de', 'http://223.255.255.254'];
     $incorrectUrls = ['http://', 'http://.', 'http://..', 'http://../', 'http://?', 'http://??', 'http://??/', 'http://#', 'http://##', 'http://##/', 'http://foo.bar?q=Spaces should be encoded', '//', '//a', '///a', '///', 'http:///a', 'foo.com', 'rdar://1234', 'h://test', 'http:// shouldfail.com', ':// should fail', 'http://foo.bar/foo(bar)baz quux', 'ftps://foo.bar/', 'http://-error-.invalid/', 'http://-a.b.co', 'http://a.b-.co', 'http://0.0.0.0', 'http://10.1.1.0', 'http://10.1.1.255', 'http://224.1.1.1', 'http://1.1.1.1.1', 'http://123.123.123', 'http://3628126748', 'http://.www.foo.bar/', 'http://.www.foo.bar./', 'http://10.1.1.1', 'http://10.1.1.254'];
     foreach ($correctUrls as $url) {
         $t = $url;
         $this->assertTrue(RestValidatorHelper::is_url($url), "{$t} should be valid");
     }
     foreach ($incorrectUrls as $url) {
         $t = $url;
         $this->assertFalse(RestValidatorHelper::is_url($url), "{$t} should be invalid");
     }
 }