我有一个Selenium WebDriver/JUnit测试，它通过<input type="file">元素测试Windows 10中的文件上传。
File file = new File(filePath);
driver.findElement(By.xpath("//input[@type='file']")).sendKeys(file.getAbsolutePath());
Browse按钮的 HTML ：
<label _ngcontent-cxx="" class="modal-button" for="file"> Browse
<input _ngcontent-cxx="" accept=".docx, .png, .pdf, .xlsx, .doc, .jpg" class="display-none" id="file" name="file" type="file">
</label>
该测试在Chrome 72之前运行良好，但是最近更新到Chrome 73和chromedriver 73.0.3683.68后，文件上传不起作用。UI 中将显示错误Upload failed，上载请求 (POST) 返回状态代码 400。仅当运行自动测试时，才会发生这种情况。手动上传工作正常。
快速的谷歌搜索发现了 Chromium 问题792336，该问题在 GitHub 问题 3730 中链接 - 输入文件上传，停止在 Chrome 73 中工作。
File Inputs: Don't generate change events when 'files' is set
The <input type=file> element generates "change" events when the user
interacts with the control to select files, exposed as the 'files'
property (a FileList). This property can be assigned to by script, and
should not generate a "change" event in such a case. It was
erroneously doing so, so fix it.
我不太确定我是否理解，但这是否意味着自动文件上传将不再适用于 Chrome？或者有没有办法通过<input type="file">上传文件在Chrome 73中工作？
注意：我还尝试使用Robot类通过本机 Windows 上传窗口上传文件，但文件上传失败并出现相同的错误。
堆栈跟踪(上传步骤后的验证步骤)：
org.openqa.selenium.TimeoutException: Expected condition failed: waiting for visibility of element located by By.xpath: //table[@id='table1']//*[contains(text(), 'license.pdf')] (tried for 8 second(s) with 500 milliseconds interval)
at org.openqa.selenium.support.ui.WebDriverWait.timeoutException(WebDriverWait.java:95)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:272)
at pageObjects.BasePage.waitForElementToAppear(BasePage.java:116)
at pageObjects.BasePage.uploadFile(BasePage.java:771)
at stepDefinitions.testStepDefs.enterNameAndUploadLicenseDocument(testStepDefs.java:306)
at ?.I enter the name and upload a license document(file:target/parallel/features/test_scenario001_run001_IT.feature:22)
Caused by: org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//table[@id='table1']//*[contains(text(), 'license.pdf
')]"}
(Session info: chrome=73.0.3683.103)
(Driver info: chromedriver=73.0.3683.68 (47787ec04b6e38e22703e856e101e840b65afe72),platform=Windows NT 10.0.17134 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 0 milliseconds
For documentation on this error, please visit: https://www.seleniumhq.org/exceptions/no_such_element.html
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'host1', ip: '10.21.171.143', os.name: 'Windows 10', os.arch: 'x86', os.version: '10.0', java.version: '1.8.0_161'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities {acceptInsecureCerts: false, acceptSslCerts: false, applicationCacheEnabled: false, browserConnectionEnabled: false, browserName: chrome, chrome: {chromedriverVersion: 73.0.3683.68 (47787ec04b6e3..., userDataDir: C:Usersuser1AppDataL...}, cssSelectorsEnabled: true, databaseEnabled: false, goog:chromeOptions: {debuggerAddress: localhost:XXXXX}, handlesAlerts: true, hasTouchScreen: false, javascriptEnabled: true, locationContextEnabled: true, mobileEmulationEnabled: false, nativeEvents: true, networkConnectionEnabled: false, pageLoadStrategy: normal, platform: XP, platformName: XP, proxy: Proxy(), rotatable: false, setWindowRect: true, strictFileInteractability: false, takesHeapSnapshot: true, takesScreenshot: true, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unexpected
AlertBehaviour: ignore, unhandledPromptBehavior: ignore, version: 73.0.3683.103, webStorageEnabled: true}
Session ID: 7de258a01764adc064e8c966xx77017g
*** Element info: {Using=xpath, value=//table[@id='table1']//*[contains(text(), 'license.pdf')]}
at sun.reflect.GeneratedConstructorAccessor12.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
at org.openqa.selenium.remote.http.JsonHttpResponseCodec.reconstructValue(JsonHttpResponseCodec.java:40)
at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:80)
at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:44)
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.RemoteWebDriver.findElement(RemoteWebDriver.java:323)
at org.openqa.selenium.remote.RemoteWebDriver.findElementByXPath(RemoteWebDriver.java:428)
at org.openqa.selenium.By$ByXPath.findElement(By.java:353)
at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:315)
at org.openqa.selenium.support.ui.ExpectedConditions$7.apply(ExpectedConditions.java:205)
at org.openqa.selenium.support.ui.ExpectedConditions$7.apply(ExpectedConditions.java:201)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:249)
at pageObjects.BasePage.waitForElementToAppear(BasePage.java:116)
at pageObjects.BasePage.uploadFile(BasePage.java:771)
at stepDefinitions.testStepDefs.enterNameAndUploadLicenseDocument(testStepDefs.java:306)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at cucumber.runtime.Utils$1.call(Utils.java:26)
at cucumber.runtime.Timeout.timeout(Timeout.java:16)
at cucumber.runtime.Utils.invoke(Utils.java:20)
at cucumber.runtime.java.JavaStepDefinition.execute(JavaStepDefinition.java:57)
at cucumber.runner.PickleStepDefinitionMatch.runStep(PickleStepDefinitionMatch.java:50)
at cucumber.runner.TestStep.executeStep(TestStep.java:65)
at cucumber.runner.TestStep.run(TestStep.java:50)
at cucumber.runner.PickleStepTestStep.run(PickleStepTestStep.java:43)
at cucumber.runner.TestCase.run(TestCase.java:46)
at cucumber.runner.Runner.runPickle(Runner.java:49)
at cucumber.runtime.junit.PickleRunners$NoStepDescriptions.run(PickleRunners.java:146)
at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:68)
at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:23)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:330)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:78)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:328)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:65)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:292)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:305)
at org.junit.runners.ParentRunner.run(ParentRunner.java:412)
at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:73)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:123)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:65)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:330)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:78)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:328)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:65)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:292)
at cucumber.api.junit.Cucumber$RunCucumber.evaluate(Cucumber.java:147)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:305)
at org.junit.runners.ParentRunner.run(ParentRunner.java:412)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Chrome74今天发布，这不再是问题。通过<input type="file">元素使用 sendKeys() 上传再次与Chrome 74/ChromeDriver 74.0.3729.6一起使用。