test something: selector needs to be typeof `string` or `function`

I want to write test on Visual Studio Code/Codeceptjs. My code is here in short :

let amazonWebKeys=require('./amazonKeys/amazonwebkeys.json'); module.exports = function() { return actor({ buttons:{ acceptcookie : '//input[@id="sp-cc-accept"]' //accept cookie button }, getParemeters : function(keys){ return amazonWebKeys[keys]; }, WebTest:function(){ this.amOnPage(this.getParemeters("url")); //go to website this.click(this.buttons.acceptcookie); //accept cookie } }); } 

But error message. Why selector needs to be typeof 'string' or 'function. What can I do for this problem :

1) WebTest test something: selector needs to be typeof `string` or `function` at Browser.findElements (node_modules\webdriverio\build\utils\index.js:176:11) at Browser.$$ (node_modules\webdriverio\build\commands\browser\$$.js:6:44) at Browser.wrapCommandFn (node_modules\@wdio\utils\build\shim.js:63:38) 

And you can see at Scenario Steps that in click() is empty.

Scenario Steps: - I.click() at Actor.WebTest (.\steps_file.js:21:12) - I.amOnPage("") at Actor.WebTest (.\steps_file.js:20:12) 

Thanks in advance

2 Answers

Error in the locator. Try the locator name input [id = "sp-cc-accept"] without the @ symbol. Or just like this this.click('#sp-cc-accept'). And read more doc

I also faced the same error. I solved it with the following code:

module.exports = function () { let parameters = require('./Parameters/parameters.json'); username = '//input[@id="username"]'; password = '//input[@id="password"]'; submitButton = '//button[@class="btn btn-primary"]'; administration = '//li[@id="admin-menu"]'; return actor({ getEnviromentParameters: function (key) { return parameters[key]; }, login: function () { this.amOnPage(this.getEnviromentParameters('loginUrl')); this.fillField(`${username}`, this.getEnviromentParameters('userName') ); this.fillField(`${password}`, this.getEnviromentParameters('password') ); this.click(`${submitButton}`); this.waitForElement(`${submitButton}`, 5) this.seeElement(`${submitButton}`); } }); }