等待angular 2+完成加载问题

Question

我最近发布了一个问题，关于白色测试基于angular的应用程序的问题(参考：wait until Angular has finished loading issue )

事实证明，完成的检查对angular 1.x应用程序有效，而我们的应用程序运行在angular 6.x上。

然后我找到了那篇文章：Detecting that Angular 2 is done running

这解释了如何对angular 2+应用程序进行类似的检查。我已经以类似于"Michal Filip“解释的方式设置了检查。

我还尝试使用了这篇文章中进一步提出的ngWebdriver解决方案。

这两种方法都有相同的问题:检查总是返回true，就像在完成加载时一样，而这不是true。

尝试反向检查，但无济于事(状态从未更改)

// Will check if Angular still has pending http_requests ongoing and wait if required
public void untilAngular2HasFinishedProcessing()
{
  until(() ->
    {
      log.info("Waiting on angular 2+ to finish processing");
      final boolean isReady = ((JavascriptExecutor) driver).executeAsyncScript(
        "var callback = arguments[arguments.length - 1];" +
          "if (document.readyState !== 'complete') {" +
          "  callback('document not ready');" +
          "} else {" +
          "  try {" +
          "    var testabilities =  window.getAllAngularTestabilities();" +
            "    var count = testabilities.length;" +
            "    var decrement = function() {" +
            "      count--;" +
            "      if (count === 0) {" +
            "        callback('complete');" +
            "      }" +
            "    };" +
            "    testabilities.forEach(function(testability) {" +
            "      testability.whenStable(decrement);" +
            "    });" +
            "  } catch (err) {" +
            "    callback(err.message);" +
            "  }" +
            "}"
      ).toString().equals("complete");
      log.info("Is angular 2+ ready? " + isReady);
      return isReady;
    }
  );
 }


  // sample call would be
 untilAngular2HasFinishedProcessing();

预期:测试将等到Angular加载完成后才返回true

Actual:从一开始就返回true，我知道事实并非如此。

可能是重复的？不是，因为这是一个基于链接问题中提出的实现的问题问题。

Answer 1

以下是我最终使用的解决方案：

public boolean untilAngular2HasFinishedProcessing()
  {
    until(() ->
      {
        log.info("Waiting on angular 2+ to finish processing");
        final boolean isReady = (Boolean.valueOf(((JavascriptExecutor) driver)
          .executeScript(
            "try{" +
          "return (window.getAllAngularTestabilities()[0]._ngZone.hasPendingMicrotasks == " +
          "false && " +
          "window.getAllAngularTestabilities()[0]._ngZone.hasPendingMacrotasks == false && " +
          "window.getAllAngularTestabilities()[0]._ngZone._nesting == 0 &&" +

          "window.getAllAngularTestabilities()[0]._ngZone.isStable == true)" +
          "}" +
          "catch(err) {" +
          "if (err.message == ('window.getAllAngularTestabilities is not a function'))" +
          "{" +
          "return true" +
          "}" +
          "}")
          .toString()));
        log.info("Is Angular 2+ ready? " + isReady);
        return isReady;
      }
    );
    return true;
  }

到目前为止，它一直在以一致的方式工作。