c# - How to determine if an element is matched by CSS selector? -

given selenium webdriver element instance, check if element matched given css selector. functionality similar jquery's is() function.

i'm using .net bindings.

example (suppose method called is)

var links = _driver.findelements(by.cssselector("a")); foreach (var link in links)  {   if (link.is(".myclass[myattr='myvalue']"))     // ...   else      // ... other thing } 

is there kind of built-in stuff achieve this, or if not, can suggest possible implementation? i'm new selenium, , have no idea yet.

update

i see there no built-in way this. final goal implement methods jquery's parents(selector) , closest(selector), suggestions appreciated more special case.

there no selenium method equivalent of jquery's $(...).is(...). however, dom offers matches. not complete replacement $(...).is(...) since not support jquery's extensions css selector syntax but, again, selenium not support these extensions either.

you'd use passing element want test javascript script pass executescript. element appear first element of arguments inside script. call matches on , return value. don't c# based on documentation, believe in c#:

bool isit = (bool)(driver ijavascriptexecutor).executescript(     "return arguments[0].matches(\".myclass[myattr='myvalue']\")", element); 

isit contains result of test. element element want test, , driver driver you've created. see caniuse compatibility. in applications, use polyfill provide matches on platforms care about.

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this being said i not recommend looping on elements , testing them 1 one. problem each executescript or getattribute call round-trip between script , browser. when run full test suites, adds up, if browser run on server farm away script. really ads up. structure test queries list of a elements , list of a.myclass[myattr='myvalue'] elements. boils down 2 round-trips. 2 lists have information need if() test.