Unable to create a gson object in a test class in AEM 6.4 | Community
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tanikaa71652610
tanikaa71652610
October 3, 2018
Solved

Unable to create a gson object in a test class in AEM 6.4

  • October 3, 2018
  • 3 replies
  • 8854 views

In AEM 6.4 ,  I am creating a gson object in a Junit Test class and when i am trying to execute the same i am getting java NoClassDefFoundError .

Though I can successfully create a gson object in a normal java class.

Please find the Failure error stack below:

java.lang.NoClassDefFoundError: com/google/gson/internal/bind/JsonTreeWriter

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at javassist.runtime.Desc.getClassObject(Desc.java:43)

at javassist.runtime.Desc.getClassType(Desc.java:152)

at javassist.runtime.Desc.getType(Desc.java:122)

at javassist.runtime.Desc.getType(Desc.java:78)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.junit.internal.runners.MethodRoadie.runBefores(MethodRoadie.java:133)

at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:298)

at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)

at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:218)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:160)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:134)

at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)

at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:136)

at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:121)

at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)

at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Caused by: java.lang.ClassNotFoundException: com.google.gson.internal.bind.JsonTreeWriter

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:202)

at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)

at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 37 more

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    Best answer by sravs

    Even 2.8.0 is still giving issues, Please try to update your version to the latest or as mentioned below. It worked for me.

     

    <dependency> 

    <groupId>com.google.code.gson<groupId>

    <artifactId>gson</artifactId>

    <version>2.8.5</version>

    </dependency>

    3 replies

    Vaibhavi_J
    Vaibhavi_J
    Level 7
    September 27, 2020

    Hi @tanikaa71652610 , 

    I believe this issue should have resolved by now. I did faced the similar issue now. So posting the solution as it might be useful for someone else in future. 

     

    Though the dependencies are resolved for implementation class and we are successfully able to use gson feature,  above error occurs when we try to test using the junit. 

    Solution:

    Adding the gson dependency will fix the issue. 

    <dependency>  <groupId>com.google.code.gson<grouoId>

    <artifactId>gson</artifactId>

    <version>2.8.0</version>

    </dependency>

      A
      Adobe Employee
      Abhishek596Adobe Employee
      Adobe Employee
      May 4, 2022

      Hi @tanikaa71652610 ,

       

      If you are still looking for the answer. Please add the below dependency to your project.

       

      <dependency> 

      <groupId>com.google.code.gson<groupId>

      <artifactId>gson</artifactId>

      <version>2.8.0</version>

      <scope>test</scope>

      </dependency>

      Note : adding scope is very important for this to work.

       

      Thanks,

      Abhishek

        R
        rakeshrangarajan
        Level 2
        May 29, 2022

        I am still facing the issue. I tried with sample main method and I getting the below error

        Exception in thread "main" java.lang.NoClassDefFoundError: com/google/gson/internal/bind/JsonTreeReader
        at com.vanguard.aem.iig.transformation.core.helper.JsonHelper.getJsonString(JsonHelper.java:14)
        at com.vanguard.aem.iig.transformation.core.helper.JsonHelper.main(JsonHelper.java:39)
        Caused by: java.lang.ClassNotFoundException: com.google.gson.internal.bind.JsonTreeReader
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 2 more

          S
          skolluri123
          Level 2
          August 8, 2023

          @skolluri123 what is the version of gson dependency?


          Thank you for your response, now its working with  2.8.9

            P
            pankaj99
            December 13, 2023

            It worked for me with below dependency

            <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.9</version>
            </dependency>

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