Selenium 网络驱动程序 : Random Error determining if element is visible

Question

我正在使用 Selenium 2.2。

我试图点击最初没有显示但变得可见的元素
在测试过程中。起初有时 webdriver 似乎工作得太快，所以元素不可见，导致 ElementNotVisibleExceptions。我添加了 WebDriverWait 以等待这些元素变为可见/可点击。但是现在我在使用时遇到了这个随机错误

WebDriverWait.until(ExpectedConditions.visibilityOfElementLocated(By.id("id")));

同样的

WebDriverWait.until(ExpectedConditions.elementToBeClickable(By.id("id")));

这是堆栈跟踪
org.openqa.selenium.WebDriverException: Error determining if element is displayed (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 219 milliseconds
Build info: version: '2.20.0', revision: '16008', time: '2012-02-27 19:03:59'
System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1 build 2600 Service Pack 3', java.version: '1.6.0'
Driver info: driver.version: RemoteWebDriver
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:44)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:516)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:170)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:123)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:438)
at org.openqa.selenium.remote.RemoteWebElement.isDisplayed(RemoteWebElement.java:280)
at org.openqa.selenium.support.ui.ExpectedConditions.elementIfVisible(ExpectedConditions.java:136)
at org.openqa.selenium.support.ui.ExpectedConditions.access$1(ExpectedConditions.java:135)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:106)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:1)
at org.openqa.selenium.support.ui.ExpectedConditions$11.apply(ExpectedConditions.java:252)
at org.openqa.selenium.support.ui.ExpectedConditions$11.apply(ExpectedConditions.java:1)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:201)
at MyTest.myTest(MyTest.java:xx)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:600)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)


这只是有时发生。忽略 WebDriverException 可能会解决这个问题，但这似乎不是一个干净的解决方案。这不可能是超时问题，因为我尝试将超时限制设置为一分钟或更长时间，但在几毫秒后仍然失败。

有人有一个干净的解决方案吗？

提前致谢

编辑:顺便说一句。我正在使用 InternetExplorerDriver

Answer 1

确保页面只有一个 modalPanel。尝试获取可见面板(java):

public WebElement getVisibleModalPanel(){
 for (WebElement element : driver.findElements(By.cssSelector('csslocator'))) {
  if (element.isDisplayed()) {
       return element;
  }
 }
 return null;
}

实现等待这样的事情:

(new WebDriverWait(getDriver(), timeout, 400)).ignoring(StaleElementReferenceException.class).until(
                new ExpectedCondition<Boolean>() {

                    @Override
                    public Boolean apply(WebDriver driver) {
                        for (WebElement element : driver.findElements(By.cssSelector(locator))) {
                            if (element.isDisplayed()) {
                                return true;
                            }
                        }
                        return false;
                    }

                });