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RetryAnalyzer cannot be cast to org.testng.ITestNGListener #2166

Closed rajivnw closed 4 years ago

rajivnw commented 4 years ago

TestNG Version 7.0.0

IRetryAnalyzer implementation 

package com.automation.test;

import org.testng.IRetryAnalyzer;
import org.testng.ITestResult;

public class MyRetryAnalyzer implements IRetryAnalyzer{

    private int min=0;
    private int max=2;

    @Override
    public boolean retry(ITestResult result) {
        if(min<max) {
            System.out.println("retring test case "+result.getName()+" "+min);
            min++;
            return true;
        }
        return false;
    }

}

Register a listener in testng.xml

<listeners>
<listener class-name="com.automation.test.MyRetryAnalyzer"></listener>
</listeners>

getting below error in eclipse -:

[RemoteTestNG] detected TestNG version 7.0.0
java.lang.ClassCastException: com.automation.test.MyRetryAnalyzer cannot be cast to org.testng.ITestNGListener
    at org.testng.TestNG.addListeners(TestNG.java:937)
    at org.testng.TestNG.initializeConfiguration(TestNG.java:897)
    at org.testng.TestNG.initializeEverything(TestNG.java:981)
    at org.testng.remote.support.RemoteTestNG6_12.initialize(RemoteTestNG6_12.java:22)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:97)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

Using mvn test command line getting error -:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:3.0.0-M3:test (default-test) on project docker: There are test failures.
[ERROR] 
[ERROR] Please refer to /Users/rajiv/eclipse-workspace/docker/target/surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] There was an error in the forked process
[ERROR] com.automation.test.MyRetryAnalyzer cannot be cast to org.testng.ITestNGListener
[ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: There was an error in the forked process
[ERROR] com.automation.test.MyRetryAnalyzer cannot be cast to org.testng.ITestNGListener
[ERROR]     at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:657)
[ERROR]     at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:283)
[ERROR]     at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:246)
[ERROR]     at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1161)
[ERROR]     at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:1002)
[ERROR]     at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:848)
[ERROR]     at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
[ERROR]     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
[ERROR]     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
[ERROR]     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
[ERROR]     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
[ERROR]     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
[ERROR]     at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
[ERROR]     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
[ERROR]     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
[ERROR]     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
[ERROR]     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
[ERROR]     at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
[ERROR]     at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:290)
[ERROR]     at org.apache.maven.cli.MavenCli.main(MavenCli.java:194)
[ERROR]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERROR]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR]     at java.lang.reflect.Method.invoke(Method.java:498)
[ERROR]     at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
[ERROR]     at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
[ERROR]     at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
[ERROR]     at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR]

If I remove the listner from testng same work.

krmahadevan commented 4 years ago

TestNG is working as designed. org.testng.IRetryAnalyzer doesn't extend org.testng.ITestNGListener and so its not a listener. So its implementation cannot be wired into TestNG via the <listener> tag.

You can either use it via the retryAnalyzer attribute of the @Test annotation or make use of an org.testng.IAnnotationTransformer implementation to add the retry analyser in runtime, and wire in the custom annotation transformer via the <listener> tag