javascript - implicitlyWait does not work in webdriver javascript

Question

I want to wait for the error message comes out. However, when I use browser.driver.manage().timeouts().implicitlyWait(), but I have to use browser.driver.sleep()

this.getErrorMessage = function () {
    var defer = protractor.promise.defer();
    browser.driver.sleep(2000); //This works
    browser.driver.manage().timeouts().implicitlyWait(2000); // This does not work
    browser.driver.findElement(By.xpath(_error_msg_xpath)).getText().then(function (errorMsg) {
        defer.fulfill(errorMsg);
    });
    return defer.promise;
};

Answer 1

据我了解，browser.wait()在这种情况下您需要一个：

this.getErrorMessage = function () {
    var EC = protractor.ExpectedConditions;
    var elm = element(by.xpath(_error_msg_xpath));

    browser.wait(EC.presenceOf(elm), 2000);
    return elm.getText();
};

这将等待元素存在最多2 秒，并返回带有元素文本的承诺，以防找到元素，如果元素在 2 秒内不存在，您将收到超时错误。

Answer 2

更新

Xpath 是一种较慢的定位策略。使用显式等待，可能会达到 3 秒。

var aElement
try {
  aElement = driver.wait(until.elementLocated(By.xpath(_error_msg_xpath)), 3000);
  aElement.getText().then(function (errorMsg) {
      defer.fulfill(errorMsg);
  });
catch (err) {
  message.innerHTML = "Error: " + err + ".";
}

或类似的东西。将等待时间（上面的又名 3000）设置为您希望等待错误的时间。如果首先找到元素，则退出直到。