我正在使用量角器Async / Await重构我的框架，以避免在整个代码库中出现草率的browser.sleep（）。
下面是测试步骤，然后以代码为例：
Opens ChromeBrowser
Logins with the credentials
Selects a customer
Clicks on "Manage Customer" button.
能否请您帮我解决以下错误：
Report destination: target\e2e\screenshots\my-report.html
[12:42:21] I/launcher - Running 1 instances of WebDriver
[12:42:21] I/hosted - Using the selenium server at http://127.0.0.1:4444/wd/hub
(node:18208) UnhandledPromiseRejectionWarning: 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 you
r test involves client-side navigation, which can interfere with Protractor's bootstrapping. See http://git.io/v4gXM for details"
at runWaitForAngularScript.then (C:\Users\Ashish\AppData\Roaming\npm\node_modules\protractor\built\browser.js:463:23)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)Error
at ElementArrayFinder.applyAction_ (C:\Users\Ashish\AppData\Roaming\npm\node_modules\protractor\built\element.js:459:27)
at ElementArrayFinder.(anonymous function).args [as sendKeys] (C:\Users\Ashish\AppData\Roaming\npm\node_modules\protractor\built\element.js:91:29)
at ElementFinder.(anonymous function).args [as sendKeys] (C:\Users\Ashish\AppData\Roaming\npm\node_modules\protractor\built\element.js:831:22)
at customer.cusSelection (C:\Users\Ashish\Documents\Protractor\scripts\CustomerSelection.js:7:50)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
(node:18208) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:18208) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
[12:42:25] I/launcher - 0 instance(s) of WebDriver still running
[12:42:25] I/launcher - chrome #01 passed
下面是Conf.js，Scenario_01.js和相应的模块，供您参考：
Conf.js：
var HtmlScreenshotReporter = require('protractor-jasmine2-screenshot-reporter');
var reporter = new HtmlScreenshotReporter({
dest: 'target/e2e/screenshots',
filename: 'my-report.html',
ignoreSkippedSpecs: true,
reportOnlyFailedSpecs: false,
captureOnlyFailedSpecs: true ,
showSummary: true,
showQuickLinks: true,
showConfiguration: true,
reportTitle: "Protractor Automation Report",
reportFailedUrl: true,
inlineImages: true,
});
exports.config = {
seleniumAddress: 'http://127.0.0.1:4444/wd/hub',
suites: {
Scenario1: './Scenario_01.js',
},
SELENIUM_PROMISE_MANAGER: false,
capabilities: {
'shardTestFiles': false,
'maxInstances': 1,
'browserName': 'chrome',
'chromeOptions': {
'args': ['disable-extensions', 'start-maximized'] //'--headless',
}
},
allScriptsTimeout: 11000,
getPageTimout: 10000,
restartBrowserBetweenTests: false,
framework: 'jasmine2',
jasmineNodeOpts: {
onComplete: null,
isVerbose: true,
showColors: true, // is True, prints colors to terminal
includeStackTrace: true,
defaultTimeoutInterval: 30000,
print: function () {}
},
beforeLaunch: function() {
return new Promise(function(resolve){
reporter.beforeLaunch(resolve);
});
},
onPrepare: function () {
jasmine.getEnv().addReporter(reporter);
browser.manage().window().maximize();
browser.manage().timeouts().implicitlyWait(5000);
jasmine.getEnv().addReporter( new Jasmine2HtmlReporter({savePath: 'target/screenshots'}));
}
};
Scenario_01.js：
describe('Scenario_01', function() {
var common = require('./scripts/CloseBrowsers.js');
var Login = require('./scripts/Login.js');
var customer = require('./scripts/CustomerSelection.js');
it('Login', function() {
browser.waitForAngularEnabled(false);
Login.login('admin','Adminpwd');
});
it('CustomerSelection', function() {
browser.waitForAngularEnabled(true);
customer.cusSelection();
});
afterAll(function(){
common.closeBrowsers();
});
});
Login.js：
var Login = function() {
this.login = async function(username, passwordKey){
await browser.get('http://testwebsite.com/showCust');
await element(by.name('USER')).sendKeys(username);
await element(by.name('PASSWORD')).sendKeys(passwordKey);
await element(by.xpath('/html/body/table/tbody/tr[2]/td/table/tbody/tr/td/table/tbody/tr[3]/td/form/input[9]')).click();
await element(by.name('YES')).click();
//browser.sleep(10000);
};
}
module.exports = new Login();
CustomerSelection.js：
var customer = function(){
this.cusSelection = async function(){
await element(by.css(['ng-model="selectedChannel.selected"']));
await element(by.id('customer-auto-complete')).sendKeys('TestCustomer');
//browser.sleep(500);
await element.all(by.css('ul[class^="ui-autocomplete"]')).first().click();
//browser.sleep(1500);
await element(by.partialButtonText('Manage Customer')).click();
browser.sleep(10000);
};
}
module.exports = new customer();
答案 0 :(得分：2)
该错误明确表明未处理CustomerSelection.js中的拒绝承诺。根据堆栈跟踪，await element(by.xpath(...))无法解决承诺。
解决此问题的方法是在customer.cusSelection()中捕获Scenario_01.js:并在那里处理异常。
默认情况下，每个带有async关键字的方法的返回类型都是promise。因此，您应该在customer.cusSelection()中的Scenario_01.js:上等待，或者使用then-catch子句进行断言。
类似的东西-
it('CustomerSelection', async function() {
browser.waitForAngularEnabled(true);
let response = await customer.cusSelection();
});
// OR this to catch exceptions.
it('CustomerSelection', function() {
browser.waitForAngularEnabled(true);
customer.cusSelection()
.then(response => console.log(response))
.catch(error => console.error(error));
});
Node.js今后将朝着与unhandled promise rejections错误类似的方式处理uncaughtException。
这意味着即将到来的节点版本将在遇到承诺拒绝（reference）时终止该过程。
更新- CustomerSelection.js
的代码段
var customer = function(){
this.cusSelection = async function(){
await element(by.css(['ng-model="selectedChannel.selected"']));
await element(by.id('customer-auto-complete')).sendKeys('TestCustomer');
//browser.sleep(500);
// updating this snippet
// await element.all(by.css('ul[class^="ui-autocomplete"]')).first().click();
// to following
let elements = await element.all(by.css('ul[class^="ui-autocomplete"]'));
elements.first().click();
//browser.sleep(1500);
await element(by.partialButtonText('Manage Customer')).click();
browser.sleep(10000);
};
}
module.exports = new customer();