i running node.js , selenium webdriverjs. 1 of tests failing following error:
unknownerror: unknown error: runtime.evaluate threw exception: error: element not attached page document i understand staleelementreferenceexception, have not been able find reliable workaround. have tried following without success:
waiting element appear on page before finding , clicking on element
waitforelement: function (selector, timeout) { if (typeof(timeout) === 'undefined') { timeout = 3000; } driver.wait(function() { return driver.findelements(selector).then(function(list) { return list.length > 0; }); }, timeout); }- waiting explicit time period (
driver.sleep(1000)) before finding , clicking on element - finding element multiple times (using
.findelement()) before clicking on element using promise chain catch errors , try re-clicking on element
driver.gettitle().then(function(title) { driver.findelement(webdriver.by.xpath(...)).click(); }).thencatch(function(e) { driver.findelement(webdriver.by.xpath(...)).click(); });using promise chain recursive function keep trying re-click element
var getstaleelement = function(selector, callback) { var element = driver.findelement(selector); callback(element); }).thencatch(function(e) { getstaleelement(selector, callback); }); var clickself = function(ele) { return ele.click() }; driver.gettitle().then(function(title) { driver.findelement(webdriver.by.xpath(...)).click(); }).thencatch(function(e) { getstaleelement(webdriver.by.xpath(...), clickself); });- methods 4 , 5 using errback argument of
.then()in place of.thencatch() - combinations of above
it seems selenium not able catch specific error. used print statements confirm other errors such nosuchelementerror caught .thencatch(). there workaround allow me deal stale elements?
i had similar problem, made below work-around, can give try ...
/* * params.config - { * opposite - {boolean} - if true, wait till negative result reached/ error thrown. * maxwaittime - {number} - if time exceeds, throw error , leave. * waittime - {number} - wait time between 2 checks. * expectvalue - {boolean} - want run without error, or should expect value * expectedvalue - {object} - object value should or should not match. * } * params.fn - function returns promise want keep checking till desire value reached */ function waiter(fn, config){ config = config || {}; var deffered = driver.promise.defer(), wt = config.waittime || 100, mwt = config.maxwaittime || 3000, timeoutreached = false, pcall = function(){ fn().then(pthen, pcatch); }, pthen = function(data){ if(timeoutreached) return; if(config.expectvalue){ if(config.opposite){ if(data == config.expectedvalue){ settimeout(pcall, wt); }else{ cleartimeout(vtimeout); deffered.fulfill(true); } }else{ if(data == config.expectedvalue){ cleartimeout(vtimeout); deffered.fulfill(true); }else{ settimeout(pcall, wt); } } }else{ deffered.fulfill(true); } }, pcatch = function(err){ if(timeoutreached) return; if(config.opposite){ deffered.fulfill(true); }else{ settimeout(pcall, wt); } }; pcall(); var vtimeout = settimeout(function(){ timeoutreached = true; if(config.opposite){ deffered.fulfill(true); }else{ deffered.reject(new error('timed-out')); } }, mwt); return deffered.promise; } example usage( case):
var mypromise = function(){ return driver.findelement(webdriver.by.xpath(...)).click(); }; //default use waiter(mypromise).then(function(){ console.log('finally...'); }).catch(fucntion(err){ console.log('not working: ', err); }); // custom timeout after 10 seconds waiter(mypromise, {maxwaittime: 10000}).then(function(){ console.log('finally...'); }).catch(fucntion(err){ console.log('not working: ', err); }); 
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