Selenium-等待，直到返回的javascript脚本值匹配值 [英] Selenium - Wait until returned javascript script value match value

问题描述

我需要等到javascript的结果匹配字符串或布尔值.

I need to wait until the result of a javascript match a string or a boolean value.

使用此javascript:

With this javascript:

document.getElementById('video_html5').seeking;

我得到一个假"/真"值，我需要等到该值是假"，所以我确定视频不是在寻找视频，但我只是找到了一种等待视频的方式. javascript命令值，而不是检查值是否与某些文本匹配的方法.

I get a "false" / "true" value, and i need to wait until the value is "false", so I'm sure that the video is not seeking, but I only found the way to wait for a javascript command value and not the way to check that the value matches some text.

new WebDriverWait(driver, 30)
    .until(ExpectedConditions.jsReturnsValue("return document.getElementById('video_html5').seeking;"));

因为在某些情况下，我得到的字符串不是布尔值，所以需要比较那些字符串.

Because in some cases I get a string other than boolean and need to compare those strings.

我已经找到了在Ruby中而不是在Java中的方法:

I have found how to do it in Ruby but not in Java:

wait_element = @wait.until { @driver.execute_script("return document.getElementById('vid1_html5_api_Shaka_api').seeking;").eql? false }

推荐答案

您可以编写自己的自定义期望条件.

You can write your own custom expected conditions.

public class MyCustomConditions {

  public static ExpectedCondition<Boolean> myCustomCondition() {
    return new ExpectedCondition<Boolean>() {
      @Override
      public Boolean apply(WebDriver driver) {
        return (Boolean) ((JavascriptExecutor) driver)
          .executeScript("return document.getElementById('video_html5').seeking === 'string_value' || ... ");
      }
    };
  }
}

然后在测试中，您可以使用以下条件.

And then in your tests you can use the condition as follows.

WebDriverWait wait = new WebDriverWait(driver, 30);
wait.until(MyCustomConditions.myCustomCondition());

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