How to use Interface IMethodInstance class of org.testng package

Best Testng code snippet using org.testng.Interface IMethodInstance

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1package common;2import java.lang.annotation.Retention;3import java.lang.annotation.Target;4import java.util.ArrayList;5import java.util.List;6import org.testng.IMethodInstance;7import org.testng.IMethodInterceptor;8import org.testng.ITestContext;9import org.testng.ITestNGListener;10public interface IMethodInterceptorClass extends ITestNGListener {11 List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context);12 }13/​*14public class IMethodInterceptorClass implements IMethodInterceptor {15 16 @Override17 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {18 List<IMethodInstance> methodlist = new ArrayList<IMethodInstance>();19 /​/​ Read these flags from somewhere, system var /​ test context /​ file or20 /​/​ where ever21 Boolean shouldRunTest1 = Boolean.valueOf(context.getAttribute("SHOULD_RUN_TEST1")22 .toString());23 Boolean shouldRunTest2 = Boolean.valueOf(context.getAttribute("SHOULD_RUN_TEST2")24 .toString());25 for (IMethodInstance iMethodInstance : methods) {26 /​/​ decide based on method name /​ group /​ priority /​ description or27 /​/​ what ever28 String methodName = iMethodInstance.getMethod().getMethodName();29 if (iMethodInstance.getMethod().isTest()) {30 if (shouldRunTest1 && methodName.equals("testCase1")) {31 methodlist.add(iMethodInstance);32 } else if (shouldRunTest2 && methodName.equals("testCase2")) {33 methodlist.add(iMethodInstance);34 }35 }36 }37 /​/​ Here we return the test cases to be run38 return methodlist;39 }40 41}42*/​ 43 44 ...

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1/​*2 * Copyright 2017 the original author or authors.3 *4 * Licensed under the Apache License, Version 2.0 (the "License");5 * you may not use this file except in compliance with the License.6 * You may obtain a copy of the License at7 *8 * http:/​/​www.apache.org/​licenses/​LICENSE-2.09 *10 * Unless required by applicable law or agreed to in writing, software11 * distributed under the License is distributed on an "AS IS" BASIS,12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13 * See the License for the specific language governing permissions and14 * limitations under the License.15 */​16package org.gradle.api.internal.tasks.testing.testng;17import org.testng.IMethodInstance;18import org.testng.ITestClass;19/​**20 * Listener that reacts if a test class is started and finished.21 * This listener is invoked if the executing TestNG version is >= 6.9.10 which introduces the {@code org.testng.IClassListener}.22 *23 * @see TestNGListenerAdapterFactory24 */​25public interface TestNGClassListener {26 void onBeforeClass(ITestClass testClass);27 /​**28 * for compatibility reasons with testng 6.9.1029 */​30 void onBeforeClass(ITestClass testClass, IMethodInstance mi);31 void onAfterClass(ITestClass testClass);32 /​**33 * for compatibility reasons with testng 6.9.1034 */​35 void onAfterClass(ITestClass testClass, IMethodInstance mi);36}...

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1package com.ad.listeners;2import java.util.ArrayList;3import java.util.HashSet;4import java.util.List;5import java.util.Set;6import org.testng.IMethodInstance;7import org.testng.IMethodInterceptor;8import org.testng.ITestContext;9import org.testng.annotations.Test;10/​**11 * 12 * IMethodInterceptor interface is used to modify the list of test methods that we want TestNG to run. 13 * It will be invoked right before TestNG starts invoking test methods.14 * It has just one method to implement intercept which returns the altered list of methods.15 *16 * **/​17public class MethodInterceptorListener implements IMethodInterceptor {18 @Override19 public List<IMethodInstance> intercept(List<IMethodInstance> methods,20 ITestContext context) {21 /​/​ TODO Auto-generated method stub22 List result = new ArrayList();23 for (IMethodInstance m : methods) {24 Test test = m.getMethod().getMethod().getAnnotation(Test.class);25 Set groups = new HashSet();26 for (String group : test.groups()) {27 groups.add(group);28 29 }30 if (groups.contains("perf")) {31 result.add(m);32 }else{33 String testMethod = m.getMethod().getMethod().getName();34 System.out.println(testMethod+ " not a performance test so remove it");35 }36 }37 return result;38 }39}...

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1package clear.utils;2import java.util.Collections;3import java.util.Comparator;4import java.util.List;5import org.testng.IMethodInstance;6import org.testng.IMethodInterceptor;7import org.testng.ITestContext;8/​**9* This class is implementation of IMethodInterceptor interface, to sort the orderting of test10* @author ptt4kor11* @version 1.012*/​13public class ExecutionOrdering implements IMethodInterceptor {14 @Override15 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {16 17 Collections.sort(methods, new MyComparator());18 return methods;19 }20 21 public static class MyComparator implements Comparator<IMethodInstance> {22 23 @Override24 public int compare(IMethodInstance o1, IMethodInstance o2) {25 /​/​ o1.getMethod().getConstructorOrMethod().get26 /​/​ o1.getInstance().toString()27 return o1.getInstance().toString().compareTo(o2.getInstance().toString());28 }29 30 }31}...

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Interface IMethodInstance

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1import org.testng.IMethodInstance;2import org.testng.IMethodInterceptor;3import org.testng.ITestContext;4import org.testng.ITestNGMethod;5import org.testng.annotations.Test;6import java.util.ArrayList;7import java.util.List;8public class MethodInterceptor implements IMethodInterceptor {9 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {10 List<IMethodInstance> result = new ArrayList<IMethodInstance>();11 for (IMethodInstance method : methods) {12 ITestNGMethod testMethod = method.getMethod();13 if (testMethod.getConstructorOrMethod().getMethod().isAnnotationPresent(Test.class)) {14 String[] groups = testMethod.getGroups();15 if (groups.length > 0) {16 for (String group : groups) {17 if (group.equals("group1")) {18 result.add(method);19 }20 }21 }22 }23 }24 return result;25 }26}27import org.testng.Assert;28import org.testng.annotations.Test;29public class TestClass {30 @Test(groups = "group1")31 public void test1() {32 Assert.assertEquals(1, 1);33 }34 @Test(groups = "group2")35 public void test2() {36 Assert.assertEquals(1, 1);37 }38}39import org.testng.annotations.Test;40@Test(groups = "group1")41public class TestClass2 {42 public void test1() {43 Assert.assertEquals(1, 1);44 }45 public void test2() {46 Assert.assertEquals(1, 1);47 }48}49import org.testng.TestNG;50import org.testng.annotations.Test;51import java.util.ArrayList;52import java.util.List;53public class TestRunner {54 public static void main(String[] args) {55 TestNG runner = new TestNG();56 List<String> suites = new ArrayList<String>();57 suites.add("testng.xml");58 runner.setTestSuites(suites);59 runner.run();60 }61}

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Interface IMethodInstance

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1import org.testng.IMethodInstance;2import org.testng.IMethodInterceptor;3import org.testng.ITestContext;4import java.util.List;5import java.util.ArrayList;6import java.util.Collections;7import java.util.Comparator;8public class MyMethodsInterceptor implements IMethodInterceptor {9 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {10 List<IMethodInstance> result = new ArrayList<IMethodInstance>(methods);11 Collections.sort(result, new Comparator<IMethodInstance>() {12 public int compare(IMethodInstance o1, IMethodInstance o2) {13 return o1.getMethod().getMethod().getAnnotation(Test.class).priority() - o2.getMethod().getMethod().getAnnotation(Test.class).priority();14 }15 });16 return result;17 }18}19import org.testng.ITestContext;20import org.testng.ITestListener;21import org.testng.ITestResult;22import java.util.logging.Logger;23public class TestListener implements ITestListener {24 private static Logger log = Logger.getLogger(TestListener.class.getName());25 public void onTestStart(ITestResult result) {26 log.info("Test Started: " + result.getName());27 }28 public void onTestSuccess(ITestResult result) {29 log.info("Test Passed: " + result.getName());30 }31 public void onTestFailure(ITestResult result) {32 log.info("Test Failed: " + result.getName());33 }34 public void onTestSkipped(ITestResult result) {35 log.info("Test Skipped: " + result.getName());36 }37 public void onTestFailedButWithinSuccessPercentage(ITestResult result) {38 log.info("Test Failed but within Success Percentage: " + result.getName());39 }40 public void onStart(ITestContext context) {41 log.info("Test Started: " + context.getName());42 }43 public void onFinish(ITestContext context) {44 log.info("Test Finished: " + context.getName());45 }46}47import org.testng.IAnnotationTransformer;48import org.testng.annotations.ITestAnnotation;49import java.lang.reflect.Constructor;50import java.lang.reflect.Method;51public class MyTransformer implements IAnnotationTransformer {52 public void transform(ITestAnnotation annotation, Class testClass, Constructor testConstructor, Method testMethod) {

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Interface IMethodInstance

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1import org.testng.IMethodInstance;2import org.testng.IMethodInterceptor;3import org.testng.ITestContext;4import java.util.List;5public class TestNGInterceptor implements IMethodInterceptor {6 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {7 return methods;8 }9}10import org.testng.IMethodInstance;11import org.testng.IMethodInterceptor;12import org.testng.ITestContext;13import java.util.List;14public class TestNGInterceptor implements IMethodInterceptor {15 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {16 return methods;17 }18}19import org.testng.IMethodInstance;20import org.testng.IMethodInterceptor;21import org.testng.ITestContext;22import java.util.List;23public class TestNGInterceptor implements IMethodInterceptor {24 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {25 return methods;26 }27}28import org.testng.IMethodInstance;29import org.testng.IMethodInterceptor;30import org.testng.ITestContext;31import java.util.List;32public class TestNGInterceptor implements IMethodInterceptor {33 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {34 return methods;35 }36}37import org.testng.IMethodInstance;38import org.testng.IMethodInterceptor;39import org.testng.ITestContext;40import java.util.List;41public class TestNGInterceptor implements IMethodInterceptor {42 public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {43 return methods;44 }45}46import org.testng.IMethodInstance;47import org.testng.IMethodInterceptor;48import org.testng.ITestContext;49import java.util.List;

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Interface IMethodInstance

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1public void getMethodInstance() {2 IMethodInstance instance = null;3 IMethodInstance result = instance.getMethodInstance();4}5public void intercept() {6 IMethodInstance instance = null;7 List<IMethodInstance> result = instance.intercept();8}9public void includeMethod() {10 IMethodSelector instance = null;11 boolean result = instance.includeMethod();12}13public void newInstance() {14 IObjectFactory instance = null;15 Object result = instance.newInstance();16}17public void newInstance() {18 IObjectFactory2 instance = null;19 Object result = instance.newInstance();20}21public void newInstance() {22 IObjectFactory2 instance = null;23 Object result = instance.newInstance();24}25public void newInstance() {26 IObjectFactory2 instance = null;27 Object result = instance.newInstance();28}29public void newInstance() {30 IObjectFactory2 instance = null;31 Object result = instance.newInstance();32}

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StackOverFlow community discussions

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Discussion

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classesToRun is a list of XmlClass, It can't be cast to a single XmlClass. You need to iterate over the list

for (XmlClass xmlClass : classesToRun) {
    xmlClass.setIncludedMethods(methodsToRun);
}
https://stackoverflow.com/questions/55948610/java-util-arraylist-cannot-be-cast-to-org-testng-xml-xmlclass-this-error-is-th

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