java - Selenium WebDriver java 测试中的 StaleElementReferenceException

Question

org.openqa.selenium.StaleElementReferenceException: Element not found in the cache - perhaps the page has changed since it was looked upCommand duration or timeout: 30.02 secondsFor documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.htmlBuild info: version: '2.18.0', revision: '15704', time: '2012-01-27 17:37:17'System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.6.0_17'Driver info: driver.version: RemoteWebDriver    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:147)    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:113)    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:439)    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:231)    at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:72)    at com.harleydavidson.modelyear.selenium2.testcase.ImageTest.checkColor(ImageTest.java:79)    at com.harleydavidson.modelyear.selenium2.testcase.ImageTest.chooseModel(ImageTest.java:62)    at com.harleydavidson.modelyear.selenium2.testcase.ImageTest.testImage(ImageTest.java:28)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    at java.lang.reflect.Method.invoke(Method.java:597)    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Element not found in the cache - perhaps the page has changed since it was looked upBuild info: version: '2.18.0', revision: '15704', time: '2012-01-27 17:37:17'System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.6.0_17'Driver info: driver.version: unknown    at .(resource://fxdriver/modules/atoms.js:9557)    at .(resource://fxdriver/modules/atoms.js:10153)    at .(file:///C:/DOCUME~1/npolic/LOCALS~1/Temp/anonymous3371533678733192941webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10200)    at .(file:///C:/DOCUME~1/npolic/LOCALS~1/Temp/anonymous3371533678733192941webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10219)    at .(file:///C:/DOCUME~1/npolic/LOCALS~1/Temp/anonymous3371533678733192941webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10026)

Mycode has been written like this. It is for consecutive actions. First action is working fine inside loop for first time. when second loop started, it is throwing StaleElementReferenceException . So please help me , how to perform multiple actions one by one..

List<WebElement> colorButtons = driver.findElements(By.xpath("/html/body/div[4]/div[2]/div/div[4]/div[2]/div/img"));

for(WebElement colorButton : colorButtons)
{
    colorButton.click();
}

问候纳尔西

Answer 1

基本上 StaleElementReferenceException 发生在页面仍在加载或更改内容时 - 因此某些元素在那里，但发生了一些事情并且该元素不再出现在 DOM 中。

当您手动单击 colorButton 时，页面上会发生什么？我希望页面开始加载或显示某些内容。

你可能应该添加一些等待，或者点击页面上的其他地方