包含任何文本的元素的量角器预期条件 [英] Protractor expected condition for element containing any text

问题描述

有没有一种方法可以检查元素中是否包含任何文本?我已经找到了textToBePresentInElement，但是此函数检查指定的值，如果失败，则不会返回正确的错误.

Is there a way how to check whether an element has any text in it? I already found textToBePresentInElement but this function checks for specified value and does not return a proper error if it fails.

我正在通过API填充元素，并且稍后将其加载，因此我希望浏览器等待直到元素中出现任何信息，然后检查正确的值.

I'm population the element via API and it's loaded bit later, so I want the browser to wait till any information appears in the element and then check for correct value.

或者，当EC发生故障时设法获得特定的错误消息也非常有帮助:

Alternatively it would be also very helpful to manage to get a specific error message when EC fails:

browser.wait(EC.textToBePresentInElement(element(by.binding('myvar')), "expected"), 5000);

推荐答案

browser.wait()的第三个参数是自定义错误消息:

The third argument to browser.wait() is a custom error message:

browser.wait(EC.textToBePresentInElement(element(by.binding('myvar')), "expected"), 5000, "Text is not something I've expected");

另请参阅:

• 有关等待超时错误的自定义消息

要等待元素包含任何文本，可以编写自定义期望条件:

To wait for an element to contain any text, you can write a custom expected condition:

var EC = protractor.ExpectedConditions;

var anyTextToBePresentInElement = function(elementFinder) {
  var hasText = function() {
    return elementFinder.getText().then(function(actualText) {
      return actualText;
    });
  };
  return EC.and(EC.presenceOf(elementFinder), hasText);
};

这是用法:

browser.wait(anyTextToBePresentInElement(element(by.binding('myvar'))), 5000);

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