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如何用量角器捕獲AngularJS錯誤

[英]How to catch AngularJS Error with Protractor

 原文  2015-07-21 11:23:31  8   1    angularjs/ protractor/ angularjs-e2e

問題描述

當E2E使用Protractor測試AngularJS應用程序時，我遇到了一些問題。 總結一下：我有以下規范，第一步總是因btstrpd錯誤而失敗。 （該頁面是自動引導的，我們使用AngularJS v1.3.0和Protractor v2.1.0。） 

describe('Protractor Demo App', function() {

    it('should have a title', function() {
        browser.get('http://myapp.abc.de/ext/#/login');
        expect(browser.getTitle()).toEqual('My App');
    });

    it('should do other stuff', function() {
        // ...
    });

});

錯誤： 

1) Protractor Demo App should have a title
 Message:
 UnknownError: unknown error: [ng:btstrpd] http://errors.angularjs.org/1.3.15/ng/btstrpd?p0=document
  (Session info: chrome=43.0.2357.132)
  (Driver info: chromedriver=2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7d3),platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 9 milliseconds

（ 這里有完整描述 ）

由於我似乎沒有找到防止此錯誤的解決方案，並且剩余的測試步驟沒有任何問題，我的方法是簡單地忽略錯誤。 但是我不希望測試用例因此而失敗。 這讓我想到了一個問題：如何捕獲此錯誤以便測試不會失敗？ 在步驟中的兩個語句周圍的簡單try-catch不是技巧，因為我在這里沒有任何承諾我也不能做典型的promise錯誤處理，因為人們會手動處理例如NoSuchElementError 。

編輯 - webdriver控制台中的錯誤： 

12:06:18.975 INFO - Executing: [new session: Capabilities [{count=1, browserName
=chrome}]])
12:06:18.995 INFO - Creating a new session for Capabilities [{count=1, browserNa
me=chrome}]
Starting ChromeDriver 2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7d3) on
port 23267
Only local connections are allowed.
12:06:21.248 INFO - Done: [new session: Capabilities [{count=1, browserName=chro
me}]]
12:06:21.271 INFO - Executing: [set script timeoutt: 11000])
12:06:21.281 INFO - Done: [set script timeoutt: 11000]
12:06:21.390 INFO - Executing: [get: data:text/html,<html></html>])
12:06:21.405 INFO - Done: [get: data:text/html,<html></html>]
12:06:21.425 INFO - Executing: [execute script: window.name = "NG_DEFER_BOOTSTRA
P!" + window.name;window.location.replace("http://myapp.abc.de/ext/#/login");, [
]])
12:06:23.440 INFO - Done: [execute script: window.name = "NG_DEFER_BOOTSTRAP!" +
 window.name;window.location.replace("http://myapp.abc.de/ext/#/login");, []]
12:06:23.458 INFO - Executing: [execute script: return window.location.href;, []
])
12:06:23.468 INFO - Done: [execute script: return window.location.href;, []]
12:06:23.489 INFO - Executing: [execute async script: try { return (function (at
tempts, asyncCallback) {
  var callback = function(args) {
    setTimeout(function() {
      asyncCallback(args);
    }, 0);
  };
  var check = function(n) {
    try {
      if (window.angular && window.angular.resumeBootstrap) {
        callback([true, null]);
      } else if (n < 1) {
        if (window.angular) {
          callback([false, 'angular never provided resumeBootstrap']);
        } else {
          callback([false, 'retries looking for angular exceeded']);
        }
      } else {
        window.setTimeout(function() {check(n - 1);}, 1000);
      }
    } catch (e) {
      callback([false, e]);
    }
  };
  check(attempts);
}).apply(this, arguments); }
catch(e) { throw (e instanceof Error) ? e : new Error(e); }, [10]])
12:06:25.603 INFO - Done: [execute async script: try { return (function (attempt
s, asyncCallback) {
  var callback = function(args) {
    setTimeout(function() {
      asyncCallback(args);
    }, 0);
  };
  var check = function(n) {
    try {
      if (window.angular && window.angular.resumeBootstrap) {
        callback([true, null]);
      } else if (n < 1) {
        if (window.angular) {
          callback([false, 'angular never provided resumeBootstrap']);
        } else {
          callback([false, 'retries looking for angular exceeded']);
        }
      } else {
        window.setTimeout(function() {check(n - 1);}, 1000);
      }
    } catch (e) {
      callback([false, e]);
    }
  };
  check(attempts);
}).apply(this, arguments); }
catch(e) { throw (e instanceof Error) ? e : new Error(e); }, [10]]
12:06:25.633 INFO - Executing: [execute script: return (function () {
    angular.module('protractorBaseModule_', []).
        config(['$compileProvider', function($compileProvider) {
          if ($compileProvider.debugInfoEnabled) {
            $compileProvider.debugInfoEnabled(true);
          }
        }]);
  }).apply(null, arguments);, []])
12:06:25.643 INFO - Done: [execute script: return (function () {
    angular.module('protractorBaseModule_', []).
        config(['$compileProvider', function($compileProvider) {
          if ($compileProvider.debugInfoEnabled) {
            $compileProvider.debugInfoEnabled(true);
          }
        }]);
  }).apply(null, arguments);, []]
12:06:25.663 INFO - Executing: [execute script: angular.resumeBootstrap(argument
s[0]);, [[protractorBaseModule_]]])
12:06:26.093 WARN - Exception thrown
org.openqa.selenium.WebDriverException: unknown error: [ng:btstrpd] http://error
s.angularjs.org/1.3.15/ng/btstrpd?p0=document
  (Session info: chrome=43.0.2357.134)
  (Driver info: chromedriver=2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7
d3),platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any
 stacktrace information)
Command duration or timeout: 10 milliseconds
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'xxxxx', ip: 'xxx.xxx.xx.x', os.name: 'Windows 7', os.arch: '
amd64', os.version: '6.1', java.version: '1.8.0_45'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEn
abled=false, chrome={userDataDir=C:\Users\abcdefg\AppData\Local\Temp\scoped_dir1
1436_18156}, takesHeapSnapshot=true, databaseEnabled=false, handlesAlerts=true,
version=43.0.2357.134, platform=XP, browserConnectionEnabled=false, nativeEvents
=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true,
 browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsE
nabled=true}]
Session ID: 0c39849d960cccef7ec7036b8414c9fb
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.
java:204)
        at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHa
ndler.java:156)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.ja
va:599)
        at org.openqa.selenium.remote.RemoteWebDriver.executeScript(RemoteWebDri
ver.java:508)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.openqa.selenium.support.events.EventFiringWebDriver$2.invoke(Even
tFiringWebDriver.java:101)
        at com.sun.proxy.$Proxy1.executeScript(Unknown Source)
        at org.openqa.selenium.support.events.EventFiringWebDriver.executeScript
(EventFiringWebDriver.java:213)
        at org.openqa.selenium.remote.server.handler.ExecuteScript.call(ExecuteS
cript.java:53)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession
.java:168)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
12:06:26.103 WARN - Exception: unknown error: [ng:btstrpd] http://errors.angular
js.org/1.3.15/ng/btstrpd?p0=document
  (Session info: chrome=43.0.2357.134)
  (Driver info: chromedriver=2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7
d3),platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any
 stacktrace information)
Command duration or timeout: 10 milliseconds
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'xxxx', ip: 'xxx.xxx.xx.x', os.name: 'Windows 7', os.arch: '
amd64', os.version: '6.1', java.version: '1.8.0_45'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEn
abled=false, chrome={userDataDir=C:\Users\abcdefg\AppData\Local\Temp\scoped_dir1
1436_18156}, takesHeapSnapshot=true, databaseEnabled=false, handlesAlerts=true,
version=43.0.2357.134, platform=XP, browserConnectionEnabled=false, nativeEvents
=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true,
 browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsE
nabled=true}]
Session ID: 0c39849d960cccef7ec7036b8414c9fb
12:06:26.203 INFO - Executing: [delete session: f947352d-3b40-4b1b-a46a-9d4ffe32
8b76])
12:06:27.417 INFO - Done: [delete session: f947352d-3b40-4b1b-a46a-9d4ffe328b76]

1 個解決方案

解決方案1
 0  2016-05-11 14:24:37

在你的代碼中，我會放一個WaitforAngular（）來確保同步附加Angular和Protractor。 見以下參考： 

it('should have a title', function() {
    browser.get('http://myapp.abc.de/ext/#/login');
    browser.waitForAngular();
    expect(browser.getTitle()).toEqual('My App');
});

然后，如果它不起作用，我會使用browser.pause（）; 命令。 這將破壞您使用該命令的量角器的執行。 從那里你可以打開Chrome debuging控制台，看看究竟是什么。

您還可以使用REPL debuging模式，這是檢查頁面上是否存在元素以及您使用正確選擇器的非常方便的方法。

有關使用量角器進行調試的更多信息，請參閱以下鏈接： https ： //angular.github.io/protractor/#/debugging

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