我们的CircleCI测试使用selenium,通过selenium-webdriver通过PhantomJS运行UI测试。测试在我们的流浪者环境中100%的时间在本地工作,但在CircleCI上失败大约1次,因为ECONNREFUSED错误如下:
Error: ECONNREFUSED connect ECONNREFUSED 10.0.4.1:59525
at ClientRequest.<anonymous> (node_modules/selenium-webdriver/http/index.js:238:15)
at Socket.socketErrorListener (_http_client.js:310:9)
at emitErrorNT (net.js:1278:8)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)
From: Task: WebDriver.navigate().to(http://127.0.0.1:8080/src/public/login.php?t=ur&ign=1&ut=ad)
at thenableWebDriverProxy.schedule (node_modules/selenium-webdriver/lib/webdriver.js:816:17)
at Navigation.to (node_modules/selenium-webdriver/lib/webdriver.js:1140:25)
at thenableWebDriverProxy.get (node_modules/selenium-webdriver/lib/webdriver.js:997:28)
at User.logIn (testJs/ui/utils/user.js:9:16)
at Host.logInAsHost (testJs/ui/utils/host.js:13:14)
at Preferences.disableRevenueGeneration (testJs/ui/utils/preferences.js:57:14)
at Context.<anonymous> (testJs/ui/tests/preferences.js:13:22)
这些错误在我们的测试中随机发生,并且我们的测试中没有任何特定位置触发它们。据我所知,这个问题发生在selenium / selenium-webdriver端,因为Web服务器保持正常运行并且不会产生任何错误。
我已经尝试了以下所有内容,但没有一个有效:
export DBUS_SESSION_BUS_ADDRESS
尝试
https://github.com/SeleniumHQ/docker-selenium/issues/87 if (e.code === 'ECONNRESET') {
变为if (e.code === 'ECONNRESET' || e.code === 'ECONNREFUSED') {
。这不起作用,因为selenium-webdriver只是无限期重试,从中我意识到问题似乎是一旦遇到ECONNREFUSED错误,selenium / selenium-webdriver就无法恢复。有没有人找到解决方案?
答案 0 :(得分:0)
警告:这只是一个黑客攻击,绝不是一个合适的解决方案,但它是唯一一个在CircleCI上可靠地为我们工作的解决方案。希望其他人能找到更好的解决方案。
我们的测试框架mocha似乎具有专门针对硒开发的重试机制(参见图):http://mochajs.org/#retry-tests。第一个问题是function getPackageDetails(packages) {
var detailedPackages = {};
angular.forEach(packages, function(p) {
vsmsPackageFactory.getPackage(p.id)
.then(function(response) {
var subsystem = response.data.packageManifest.subsystem;
var partNumber = response.data.packageManifest.resultConfig.partNumber;
var packageName = response.data.packageMetaData.packageName;
if(detailedPackages[subsystem] === undefined) {
detailedPackages[subsystem] = {};
}
if(detailedPackages[subsystem][partNumber] === undefined) {
detailedPackages[subsystem][partNumber] = {};
}
detailedPackages[subsystem][partNumber][packageName] = response.data;
});
});
return detailedPackages; // returns before all promises resolved
}
vsmsCampaignFactory.getCampaignPackages(queryString)
.then(function(response) {
vm.packageList = getPackageDetails(response.results);
});
和after
中的代码未重试。因此,您需要将代码移至before
和beforeEach
。第二个问题是你需要afterEach
和beforeEach
中的一些特殊逻辑来处理驱动程序错误。
因此,为了利用这种机制,我们必须重构我们的测试,以便每个测试都有一个afterEach
来设置一个新的webdriver实例,然后是一个退出该驱动程序实例的beforeEach
。这样,崩溃的驱动程序实例不会停止所有后续测试。我们开发了一个辅助函数,我们在所有afterEach
块的开头调用,这样我们就不必在测试中添加太多代码了。
然后,我们将describe
添加到我们最顶层的this.retries(10)
块中。
这是辅助类:
describe
然后,您的测试看起来像:
var webdriver = require('selenium-webdriver');
// We default to using phantomjs, but in the future, when we run tests in other browsers, e.g. via
// SauceLabs, we'll want to change the browser.
var customPhantom = webdriver.Capabilities.phantomjs();
customPhantom.set('ssl-protocol', 'any');
// For convenience in tests
global.By = webdriver.By;
global.until = webdriver.until;
var SeleniumStabilizer = function () {};
SeleniumStabilizer.prototype.MAX_RETRIES = 10;
SeleniumStabilizer.prototype.createDriver = function () {
global.driver = new webdriver.Builder()
// .forBrowser('phantomjs')
.withCapabilities(customPhantom)
.build();
// Resolves when driver is ready
return global.driver;
};
SeleniumStabilizer.prototype.init = function (opts) {
var self = this,
n = 0;
var beforeEachWithRetries = function () {
// Create a fresh selenium driver for the next test
return self.createDriver().then(function () {
if (opts.onBeforeEach) {
// Execute the test-specific defined onBeforeEach
return opts.onBeforeEach();
}
}).catch(function (err) {
// ECONNREFUSED error and we should retry?
if (err.message.indexOf('ECONNREFUSED') !== -1 && n++ < self.MAX_RETRIES) {
return beforeEachWithRetries();
} else {
throw err;
}
});
};
opts.beforeEach(function () {
n = 0;
return beforeEachWithRetries();
});
var afterEachWithRetries = function () {
return Promise.resolve().then(function () {
if (opts.onAfterEach) {
// Execute the test-specific defined onAfterEach
return opts.onAfterEach();
}
}).then(function () {
// Quit the selenium driver before starting the next test
return driver.quit();
}).catch(function (err) {
// ECONNREFUSED error and we should retry?
if (err.message.indexOf('ECONNREFUSED') !== -1 && n++ < self.MAX_RETRIES) {
// Create a new driver
return self.createDriver().then(function () {
return afterEachWithRetries();
});
} else {
throw err;
}
});
};
opts.afterEach(function () {
n = 0;
return afterEachWithRetries();
});
};