问题
I'm creating a new test framework from scratch using Spring Boot 2 and Appium. To write the tests I'm using JUnit which is already included in Spring Boot's spring-boot-starter-test POM along with many others. I added Appium to my POM and it now looks like this:
<?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>
As for my tests, I have a DriverSetup class that looks like this:
@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);
}
}
Finally, I have another class that extends from DriverSetup to make sure driver initialization is done before every test. It looks like this:
@RunWith(SpringRunner.class)
@SpringBootTest
public class FirstTryTest extends DriverSetup {
public FirstTryTest() { }
@Test
public void test() {
System.out.println("test");
}
}
I just want to make sure I can reach the test in my FirstTryTest, but every time the code initializes the AndroidDriver with the URL and the DesiredCapabilities, I get the following error:
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
I've tried using an older version of Appium (5.0.4) but it didn't work. I'd like to emphasize the end of the StackTrace. An IOException is mentioned while in other questions with similar errors script fails due to a
org.openqa.selenium.json.JsonException`.
回答1:
This error message:
java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;)Lorg/openqa/selenium/json/JsonOutput;
.
Suppressed: java.io.IOException: Incomplete document
...implies that java.lang.NoSuchMethodError was raised by the JVM.
You have mentioned about using an older version of Appium v5.0.4
It's pretty tough to analyze the error in absence of the following information pertaining to your Test Environment:
- Appium server version
- Desktop OS/version
- Mobile platform/version under test
- Real device or emulator/simulator
As per the discussions Error while running Appium script with AndroidDriver and iOS :Could not initialize the ios capabilities with 6.0.0 this error seems to be coming from the NumberCoercer Class which have been modified in Selenium RemoteDriver v3.12.0 to accept Port as Integer while earlier it was accepting String.
Solution
- Update to the latest Appium Java Client v6.1.0
- Update to the latest (atleast) Selenium v3.12.0
@SrinivasanTarget mentions one important aspect that:
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.
Here you will find a relevant discussion on java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;Ljava/lang/reflect/Type;)
来源：https://stackoverflow.com/questions/53086405/org-openqa-selenium-json-jsonoutput-writeljava-lang-objectlorg-openqa-seleniu