当在Selenium和Java中使用不正确的代码时，java.base / java.lang.reflect.Constructor.newInstance（Constructor.java:481）

Question

为了快速进行原型制作，我使用了下面的Selenium Webdriver Java代码（实际上，它不符合最佳实践，但是尽管不是最佳方法，但仍然可以正常工作）。

if (!driver.findElements(By.xpath("//div[@class='ui-lib-popup-element__close']")).isEmpty()) {
    driver.findElement(By.xpath("//div[@class='ui-lib-popup-element__close']")).click();
}

即它在findElement()中具有相同的值。当将其放入while循环时，它将在某些循环中引发异常。

Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 77.0.1, javascriptEnabled: true, moz:accessibilityChecks: false, moz:buildID: 20200602222727, moz:geckodriverVersion: 0.26.0, moz:headless: false, moz:processID: 12120, moz:profile: C:\Users\eljah32\AppData\Lo..., moz:shutdownTimeout: 60000, moz:useNonSpecCompliantPointerOrigin: false, moz:webdriverClick: true, pageLoadStrategy: normal, platform: WINDOWS, platformName: WINDOWS, platformVersion: 10.0, rotatable: false, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify}
Session ID: 77ad55a3-7cc3-4126-a91d-f0b63c438520
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:285)
    at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:84)
    at SeleniumConfirmRNN.main(SeleniumConfirmRNN.java:122)

硒库版本：

<dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>3.141.59</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-firefox-driver -->
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-firefox-driver</artifactId>
            <version>3.141.59</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-support</artifactId>
            <version>3.0.1</version>
        </dependency>

所以，如何处理此问题，这是一个错误吗？ FirefoxDriver会发生这种情况。

Answer 1

此错误消息...

Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 77.0.1, javascriptEnabled: true, moz:accessibilityChecks: false, moz:buildID: 20200602222727, moz:geckodriverVersion: 0.26.0, moz:headless: false, moz:processID: 12120, moz:profile: C:\Users\eljah32\AppData\Lo..., moz:shutdownTimeout: 60000, moz:useNonSpecCompliantPointerOrigin: false, moz:webdriverClick: true, pageLoadStrategy: normal, platform: WINDOWS, platformName: WINDOWS, platformVersion: 10.0, rotatable: false, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify}
Session ID: 77ad55a3-7cc3-4126-a91d-f0b63c438520
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

...表示GeckoDriver在Browsing Context，即Firefox Browser会话中无法在click()上的WebElement上。

---

您需要考虑以下几点：

• 首先，除非元素包含属性[[click()，否则不要在<div>元素上调用contenteditable="true"。

您可以在How to modify the innerHTML of a contenteditable element中找到详细的讨论

• 大概应该在您要引用的<input>中有一个子元素<span>或<div>，这是您想要的元素。因此，您需要更深一步，以找到引发interactable的WebDriverWait元素，然后可以使用以下elementToBeClickable()：

  Locator Strategy

参考
您可以在以下位置找到相关的讨论：

try {
  new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("//div[@class='ui-lib-popup-element__close']//input"))).click();
  System.out.println("Element was clicked");
}
catch(TimeoutException e) {
  System.out.println("Element wasn't clicked");
}