java - 警告 : Attempt to convert JsonElement from GSON. 此功能已弃用。诊断堆栈跟踪遵循 Selenium

Question

我将我的 selenium 和 chromedriver 升级到了最新版本。这样做之后，当使用相同(仍然有效)的 DesiredCapabilities 对象创建新的 chromedriver 实例时，我收到以下警告:

WARNING: Attempt to convert JsonElement from GSON. This functionality is deprecated.

有没有其他人有这个问题/知道如何解决/抑制它？

我应该注意到我运行了一个测试套件并且它通过了 OK，只是打印了这个警告。

在 MacOS 本地和远程 linux 主机上运行它。

详细信息:

苹果操作系统:

Build info: version: '3.13.0', revision: '2f0d292', time: '2018-06-25T15:24:21.231Z'
System info: host: 'mac-lap-13', ip: '0.0.0.0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.3', java.version: '1.8.0_162'

Linux:

Build info: version: '3.13.0', revision: '2f0d292', time: '2018-06-25T15:24:21.231Z'
 System info: host: 'Automation', ip: '0.0.0.0', os.name: 'Linux', os.arch: 'amd64', os.version: '3.19.0-25-generic', java.version: '1.8.0_111'

完整的堆栈跟踪:

Starting ChromeDriver 2.41.578706 (5f725d1b4f0a4acbf5259df887244095596231db) on port 46910
Only local connections are allowed.
Aug 09, 2018 3:52:54 PM org.openqa.selenium.json.JsonOutput lambda$new$11
WARNING: Attempt to convert JsonElement from GSON. This functionality is deprecated. Diagnostic stacktrace follows
org.openqa.selenium.json.JsonException: Stack trace to determine cause of warning
Build info: version: '3.13.0', revision: '2f0d292', time: '2018-06-25T15:24:21.231Z'
System info: host: 'mac-lap-13', ip: '0.0.0.0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.3', java.version: '1.8.0_162'
Driver info: driver.version: ChromeDriver
    at org.openqa.selenium.json.JsonOutput.lambda$new$11(JsonOutput.java:129)
    at org.openqa.selenium.json.JsonOutput$SafeBiConsumer.accept(JsonOutput.java:394)
    at org.openqa.selenium.json.JsonOutput.write(JsonOutput.java:248)
    at org.openqa.selenium.json.JsonOutput.convertUsingMethod(JsonOutput.java:300)
    at org.openqa.selenium.json.JsonOutput.lambda$new$13(JsonOutput.java:139)
    at org.openqa.selenium.json.JsonOutput$SafeBiConsumer.accept(JsonOutput.java:394)
    at org.openqa.selenium.json.JsonOutput.write(JsonOutput.java:248)
    at org.openqa.selenium.json.JsonOutput.lambda$null$20(JsonOutput.java:161)
    at java.util.TreeMap.forEach(TreeMap.java:1005)
    at java.util.Collections$UnmodifiableMap.forEach(Collections.java:1505)
    at org.openqa.selenium.json.JsonOutput.lambda$new$21(JsonOutput.java:160)
    at org.openqa.selenium.json.JsonOutput$SafeBiConsumer.accept(JsonOutput.java:394)
    at org.openqa.selenium.json.JsonOutput.write(JsonOutput.java:248)
    at org.openqa.selenium.json.JsonOutput.lambda$null$20(JsonOutput.java:161)
    at com.google.common.collect.SingletonImmutableBiMap.forEach(SingletonImmutableBiMap.java:65)
    at org.openqa.selenium.json.JsonOutput.lambda$new$21(JsonOutput.java:160)
    at org.openqa.selenium.json.JsonOutput$SafeBiConsumer.accept(JsonOutput.java:394)
    at org.openqa.selenium.json.JsonOutput.write(JsonOutput.java:248)
    at org.openqa.selenium.json.JsonOutput.write(JsonOutput.java:239)
    at org.openqa.selenium.json.Json.toJson(Json.java:42)
    at org.openqa.selenium.remote.NewSessionPayload.create(NewSessionPayload.java:99)
    at org.openqa.selenium.remote.NewSessionPayload.create(NewSessionPayload.java:93)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:67)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:136)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:212)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:130)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:174)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:142)
    at com.d5.automation.uitester.webdriver.ClientReactTest.setUpForTests(ClientReactTest.java:227)
    at com.d5.automation.uitester.webdriver.ClientReactTest.startWebDriver(ClientReactTest.java:130)
    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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.rules.Verifier$1.evaluate(Verifier.java:35)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runners.Suite.runChild(Suite.java:128)
    at org.junit.runners.Suite.runChild(Suite.java:27)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:105)
    at org.junit.runner.JUnitCore.runClasses(JUnitCore.java:62)
    at org.junit.runner.JUnitCore.runClasses(JUnitCore.java:49)
    at com.d5.automation.uitester.CiCdTests.ciCdFrontEndTest(CiCdTests.java:60)
    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 org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:661)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:123)

Aug 09, 2018 3:52:56 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS

Answer 1

如您所述，您已将 Selenium 和 ChromeDriver 升级到最新版本，即 Selenium v​​3.13.0 和 ChromeDriver v2.41 并使用(仍然有效的)DesiredCapabilities 类型对象创建了一个新的 ChromeDriver 实例，是 仍然有效。但是你一定看到了如下的deprecation warning:

进一步，当您执行代码块时，您会发现以下信息:

Aug 10, 2018 1:02:08 PM org.openqa.selenium.remote.DesiredCapabilities chrome
INFO: Using `new ChromeOptions()` is preferred to `DesiredCapabilities.chrome()`
Starting ChromeDriver 2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab) on port 44262
Only local connections are allowed.
Aug 10, 2018 1:02:12 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
Google

因此，根据最佳实践，您必须开始使用 new ChromeOptions()，如下所示:

package demo; //replace by your own package name

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.remote.DesiredCapabilities;

public class A_Chrome_Options_test {

    public static void main(String[] args) {
        System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
        DesiredCapabilities cap = new DesiredCapabilities();
        cap.setJavascriptEnabled(true);
        ChromeOptions opt = new ChromeOptions();
        opt.merge(cap);
        WebDriver driver = new ChromeDriver(opt);
        driver.get("https://google.com");
        System.out.println(driver.getTitle());
        driver.quit();
    }
}

关于警告:

WARNING: Attempt to convert JsonElement from GSON. This functionality is deprecated. Diagnostic stacktrace follows
org.openqa.selenium.json.JsonException: Stack trace to determine cause of warning

Selenium v​​3.13.0 的

发行说明明确提到:

• Introduced our own JSON parser and outputter, allowing GSON to be removed from our dependencies.

因此您会看到错误。

解决方案

要摆脱警告和升级到 Selenium v​​3.14.0 的错误，Release Notes 明确提到:

• Completely removed the GSON dependency. We now use reflection to try and find the class.