获取“等待量角器与页面同步时出错：”“angularJS可测试性和角度可测试性均未定义...”“

Question

我对Protractor和JS还是个新手。我写了一个简单的代码，使用一个在线计算器来添加一些数字。通过调用add()函数来添加我正在做的事情，其中我返回了一个Promise。这个承诺，我正在处理我的it区块，它是导致问题，并给出上述错误。

已尝试更新版本，但没有帮助

describe("Using Protractor and working", function(){

    var resultsExpected = [];

    function add(a,b){
        return new Promise(function(resolve, reject){
            element(by.model("first")).sendKeys(String(a));
            element(by.model("second")).sendKeys(String(b));
            element(by.id("gobutton")).click();     

            var len=0;
            len = resultsExpected.length;
            resultsExpected[len] = {value:String(a+b)};
             console.log("Length is: "+resultsExpected.length);
             console.log("Item inside: "+resultsExpected[len].value);
             resolve();
        });

    }

it("Addition from calc should give correct result", function(){
        browser.get('http://juliemr.github.io/protractor-demo/');        

        add(2,4).then(function(ff){
            expect(element(by.css("h2.ng-binding")).getText()).toEqual("6");
            return add(5,3);
        }).then(function(ff){
            expect(element(by.css("h2.ng-binding")).getText()).toEqual("8");
            return add(5,8);
        }).then(function(ff){
            expect(element(by.css("h2.ng-binding")).getText()).toEqual("13");
        })

    })
})

Failures:
1) Using Protractor and working Addition from calc should give correct result
  Message:
[31m    Error: Error while waiting for Protractor to sync with the page: "both angularJS testability and angular testability are undefined.  This could be either because this is a non-angular page or because your test involves client-side navigation, which can interfere with Protractor's bootstrapping.  See http://git.io/v4gXM for details"[0m
  Stack:
    Error: Error while waiting for Protractor to sync with the page: "both angularJS testability and angular testability are undefined.  This could be either because this is a non-angular page or because your test involves client-side navigation, which can interfere with Protractor's bootstrapping.  See http://git.io/v4gXM for details"
        at runWaitForAngularScript.then (D:\JavaScriptWorkSpace\FirstProtractor\protractor\built\browser.js:463:23)
        at ManagedPromise.invokeCallback_ (D:\JavaScriptWorkSpace\FirstProtractor\protractor\node_modules\selenium-webdriver\lib\promise.js:1376:14)
        at TaskQueue.execute_ (D:\JavaScriptWorkSpace\FirstProtractor\protractor\node_modules\selenium-webdriver\lib\promise.js:3084:14)
        at TaskQueue.executeNext_ (D:\JavaScriptWorkSpace\FirstProtractor\protractor\node_modules\selenium-webdriver\lib\promise.js:3067:27)
        at asyncRun (D:\JavaScriptWorkSpace\FirstProtractor\protractor\node_modules\selenium-webdriver\lib\promise.js:2927:27)
        at D:\JavaScriptWorkSpace\FirstProtractor\protractor\node_modules\selenium-webdriver\lib\promise.js:668:7
        at process._tickCallback (internal/process/next_tick.js:68:7)Error
        at ElementArrayFinder.applyAction_ (D:\JavaScriptWorkSpace\FirstProtractor\protractor\built\element.js:459:27)
        at ElementArrayFinder.(anonymous function).args [as getText] (D:\JavaScriptWorkSpace\FirstProtractor\protractor\built\element.js:91:29)
        at ElementFinder.(anonymous function).args [as getText] (D:\JavaScriptWorkSpace\FirstProtractor\protractor\built\element.js:831:22)
        at D:\JavaScriptWorkSpace\FirstProtractor\WorkinWithDropDown.js:55:45
        at process._tickCallback (internal/process/next_tick.js:68:7)

Answer 1

试试下面的

it("Addition from calc should give correct result", async() =>{
       await brwoser.waitForAngularEnabled(true);
       await browser.get('http://juliemr.github.io/protractor-demo/');        
    })
});

希望能对你有所帮助

Answer 2

例如。

browser.wait(condition, 5000);

而不是

browser.wait(condition);

所以没那么走运。

然后，经过多次实验，我们得出结论，除非您提供超时参数，否则browser.wait()并不总是抛出异常，当预期的条件永远不会成为真时，测试也会失败。在没有超时的情况下，最好的情况是测试将达到全局黄瓜超时，我们将得到一条无用的通用失败消息。最坏的情况是，执行偶尔会继续到下一个功能，而第一个功能在后台超时。当第一个功能最终超时时，它会导致第二个功能失败，并显示隐秘的消息both angularJS testability and angular testability are undefined。在wait()的the documentation中没有提到这种行为。

我们尝试增加全局黄瓜超时并设置全局量角器超时，但没有效果。因此，我们进行了全面更新，以始终提供超时参数，此后再也没有看到错误。