java - org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;)Lorg/openqa/selenium/json/JsonOutput;由于 java.io.IOException : Incomplete document

Question

我正在使用 Spring Boot 2 和 Appium 从头开始​​创建一个新的测试框架。为了编写测试，我使用了 JUnit，它已经包含在 Spring Boot 的 spring-boot-starter-test 中。 POM 以及许多其他的。我将 Appium 添加到我的 POM 中，现在看起来像这样:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.automationexperiment</groupId>
    <artifactId>one</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/io.appium/java-client -->
        <dependency>
            <groupId>io.appium</groupId>
            <artifactId>java-client</artifactId>
            <version>6.1.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

对于我的测试，我有一个 DriverSetup 类，如下所示:

@RunWith(SpringRunner.class)
@SpringBootTest
public class DriverSetup {

  protected AndroidDriver<AndroidElement> driver;

  @Before
  public void setUp() throws MalformedURLException {
    DesiredCapabilities capabilities = new DesiredCapabilities();
    capabilities.setCapability(MobileCapabilityType.PLATFORM_NAME, "Android");
    capabilities.setCapability(MobileCapabilityType.PLATFORM_VERSION, "6.0.1");
    capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "DeviceName");
    capabilities.setCapability(AndroidMobileCapabilityType.APP_PACKAGE, "com.google.android.gm");
    capabilities.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY, ".ConversationListActivityGmail");
    URL myUrl = new URL("http://127.0.0.1:4723/wd/hub");
    this.driver = new AndroidDriver<AndroidElement>(myUrl, capabilities);
    this.driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
  }
}

最后，我有另一个从 DriverSetup 扩展的类，以确保在每次测试之前完成驱动程序初始化。它看起来像这样:

@RunWith(SpringRunner.class)
@SpringBootTest
public class FirstTryTest extends DriverSetup {

  public FirstTryTest() { }

  @Test
  public void test() {
    System.out.println("test");
  }
}

我只是想确保我能够通过我的 FirstTryTest 中的测试，但每次代码都会使用 URL 初始化 AndroidDriver和 DesiredCapabilities ，我收到以下错误:

java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;)Lorg/openqa/selenium/json/JsonOutput;
    at io.appium.java_client.remote.NewAppiumSessionPayload.writeTo(NewAppiumSessionPayload.java:265)
    at io.appium.java_client.remote.AppiumCommandExecutor$1.createSession(AppiumCommandExecutor.java:175)
    at io.appium.java_client.remote.AppiumCommandExecutor.createSession(AppiumCommandExecutor.java:209)
    at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:231)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
    at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:42)
    at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
    at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:219)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:142)
    at io.appium.java_client.DefaultGenericMobileDriver.<init>(DefaultGenericMobileDriver.java:38)
    at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:84)
    at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:94)
    at io.appium.java_client.android.AndroidDriver.<init>(AndroidDriver.java:93)
    at com.automationexperiment.one.driversetup.DriverSetup.setUp(DriverSetup.java:31)
    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.RunBefores.evaluate(RunBefores.java:24)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    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.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at com.microsoft.java.test.runner.JUnit4TestReference.run(JUnit4TestReference.java:51)
    at com.microsoft.java.test.runner.CustomizedJUnitCoreRunner.run(CustomizedJUnitCoreRunner.java:45)
    at com.microsoft.java.test.runner.JUnitLauncher.execute(JUnitLauncher.java:26)
    at com.microsoft.java.test.runner.JUnitLauncher.main(JUnitLauncher.java:15)
    Suppressed: java.io.IOException: Incomplete document
        at com.google.gson.stream.JsonWriter.close(JsonWriter.java:559)
        at org.openqa.selenium.json.JsonOutput.close(JsonOutput.java:39)
        at io.appium.java_client.remote.NewAppiumSessionPayload.writeTo(NewAppiumSessionPayload.java:288)
        ... 41 more

我尝试使用旧版本的 Appium (5.0.4)，但它不起作用。我想强调一下 StackTrace 的结尾。安IOException在其他具有类似错误的问题中提到，脚本由于以下原因而失败 org.openqa.selenium.json.JsonException`。

Answer 1

此错误消息:

java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;)Lorg/openqa/selenium/json/JsonOutput;
.
Suppressed: java.io.IOException: Incomplete document

...暗示 java.lang.NoSuchMethodError 是由 JVM 引发的。

您提到过使用旧版本的Appium v​​5.0.4

如果缺乏与您的测试环境相关的以下信息，则很难分析错误:

• Appium 服务器版本
• 桌面操作系统/版本
• 正在测试的移动平台/版本
• 真实设备或仿真器/模拟器

根据讨论Error while running Appium script with AndroidDriver和 iOS :Could not initialize the ios capabilities with 6.0.0 此错误似乎来自 NumberCoercer 类，该类已在 Selenium RemoteDriver v3.12.0 中修改为接受 Port 作为 整数，而之前它接受字符串。

解决方案

• 更新至最新的 Appium Java 客户端 v6.1.0
• 更新到最新(至少)Selenium v​​3.12.0

• @SrinivasanTarget 提到了一个重要的方面:

  • Appium's Java client comes along with Selenium Dependency so we don't recommend to exclude selenium and add as separate dependency as it may raise conflicts at times.

在这里您可以找到关于 java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;Ljava/lang/reflect/Type;) 的相关讨论