javascript - Node.JS - How to perform verfication on a dynamic file name in JS? -

i've tried used in "split()" in order ignore dynamic string inside file name , perform verification on fixed value "schedule" , return response pass test.

describe('frontage - calendar test cases', function() {      var fs = require('fs');     var splitfilename = "schedule"     var filename = 'c:\\automation\\tests\\downloaded\\' + splitfilename.split();      it('new app - calendar - print calendar', function(){        $$("button.font-xs.md-button.ng-scope.md-ink-ripple.gray-btn").get(1).click();        browser.driver.wait(function() {           return fs.existssync(filename);        }, 30000);     }); }); 

the error

failures:    1) test cases pull - frontage sanity testing  frontage - calendar test cases new app - calendar - print calendar    message:      error: wait timed out after 30000ms    stacktrace:      error: wait timed out after 30000ms     @ c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:1630:20     @ [object object].promise.controlflow.runinframe_ (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:1877:20)     @ [object object].promise.callback_.goog.defineclass.notify (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:2464:25)     @ [object object].promise.promise.notify_ (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:563:12)     @ array.foreach (native)     @ object.goog.array.foreach (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\goog\array\array.js:203:43)     @ [object object].promise.promise.notifyall_ (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:552:16)     @ goog.async.run.processworkqueue (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\goog\async\run.js:125:21) from: task: <anonymous wait>     @ [object object].promise.controlflow.wait (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:1617:15)     @ [object object].webdriver.webdriver.wait (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\webdriver.js:714:21)     @ [object object].<anonymous> (c:\automation\tests\testcases\newapp\calendartc.js:382:23)     @ c:\automation\npm\node_modules\protractor\node_modules\jasminewd\index.js:94:14     @ [object object].promise.controlflow.runinframe_ (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:1877:20)     @ [object object].promise.controlflow.runeventloop_ (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:1755:8)     @ [object object].<anonymous> (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\webdriver\promise.js:2056:12)     @ goog.async.run.processworkqueue (c:\automation\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\goog\async\run.js:125:21)     @ runmicrotaskscallback (node.js:337:7)     @ process._tickcallback (node.js:355:11) from: task: asynchronous test function: it()     @ [object object].<anonymous> (c:\automation\npm\node_modules\protractor\node_modules\jasminewd\index.js:93:33)     @ [object object].<anonymous> (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\async-callback.js:45:37)     @ [object object].jasmine.block.execute (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:1174:17)     @ [object object].jasmine.queue.next_ (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2209:31)     @ [object object].jasmine.queue.start (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2162:8)     @ [object object].jasmine.spec.execute (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2503:14)     @ [object object].jasmine.queue.next_ (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2209:31)     @ oncomplete (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2205:18)     @ [object object].jasmine.spec.finish (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2477:5)     @ [object object].oncomplete (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:2504:10)==== async task ==== error     @ [object object].<anonymous> (c:\automation\tests\testcases\newapp\calendartc.js:380:5)     @ [object object].jasmine.env.describe_ (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:913:21)     @ [object object].jasmine.env.describe (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:898:15)     @ describe (c:\automation\npm\node_modules\protractor\node_modules\minijasminenode\lib\jasmine-1.3.1.js:658:27)     @ object.<anonymous> (c:\automation\tests\testcases\newapp\calendartc.js:1:63) 

you can use fs.readdir filenames, , check them regular expression against thing trying match.

it('new app - calendar - print calendar', function(){    $$("button.font-xs.md-button.ng-scope.md-ink-ripple.gray-btn").get(1).click();    browser.driver.wait(function() {       var filepath = 'c:\\automation\\tests\\downloaded\\';       var matcher = /schedule/;       var foundfile = false;       fs.readdirsync(filepath).foreach(function(filename) {           if (matcher.test(filename)) {              foundfile = true;            }        });        return foundfile;    }, 30000); });