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How to use TestClassTransformer class of org.powermock.core.transformers package

Best Powermock code snippet using org.powermock.core.transformers.TestClassTransformer

Source:AbstractCommonTestSuiteChunkerImpl.java

...4import org.powermock.core.classloader.annotations.PrepareForTest;5import org.powermock.core.classloader.annotations.PrepareOnlyThisForTest;6import org.powermock.core.classloader.annotations.SuppressStaticInitializationFor;7import org.powermock.core.transformers.MockTransformer;8import org.powermock.core.transformers.impl.TestClassTransformer;9import org.powermock.tests.utils.ArrayMerger;10import org.powermock.tests.utils.IgnorePackagesExtractor;11import org.powermock.tests.utils.TestChunk;12import org.powermock.tests.utils.TestClassesExtractor;13import org.powermock.tests.utils.TestSuiteChunker;14import java.lang.annotation.Annotation;15import java.lang.reflect.Method;16import java.util.ArrayList;17import java.util.LinkedHashMap;18import java.util.LinkedList;19import java.util.List;20/**21 *22 */23public abstract class AbstractCommonTestSuiteChunkerImpl implements TestSuiteChunker {24    protected static final int DEFAULT_TEST_LISTENERS_SIZE = 1;25    protected static final int NOT_INITIALIZED = -1;26    protected static final int INTERNAL_INDEX_NOT_FOUND = NOT_INITIALIZED;27    /*28    * Maps between a specific class and a map of test methods loaded by a29    * specific mock class loader.30    */31    private final List<TestCaseEntry> internalSuites = new LinkedList<TestCaseEntry>();32    private final TestClassesExtractor prepareForTestExtractor = new PrepareForTestExtractorImpl();33    private final TestClassesExtractor suppressionExtractor = new StaticConstructorSuppressExtractorImpl();34    /*35     * Maps the list of test indexes that is assigned to a specific test suite36     * index.37     */38    protected final LinkedHashMap<Integer, List<Integer>> testAtDelegateMapper = new LinkedHashMap<Integer, List<Integer>>();39    protected final Class<?>[] testClasses;40    private final IgnorePackagesExtractor ignorePackagesExtractor = new PowerMockIgnorePackagesExtractorImpl();41    private final ArrayMerger arrayMerger = new ArrayMergerImpl();42    private int currentTestIndex = NOT_INITIALIZED;43    protected AbstractCommonTestSuiteChunkerImpl(Class<?> testClass) throws Exception {44        this(new Class[]{testClass});45    }46    protected AbstractCommonTestSuiteChunkerImpl(Class<?>... testClasses) throws Exception {47        this.testClasses = testClasses;48        for (Class<?> clazz : testClasses) {49            chunkClass(clazz);50        }51    }52    @Override53    public int getChunkSize() {54        return getTestChunks().size();55    }56    public List<TestChunk> getTestChunks() {57        List<TestChunk> allChunks = new LinkedList<TestChunk>();58        for (TestCaseEntry entry : internalSuites) {59            for (TestChunk chunk : entry.getTestChunks()) {60                allChunks.add(chunk);61            }62        }63        return allChunks;64    }65    public List<TestChunk> getTestChunksEntries(Class<?> testClass) {66        for (TestCaseEntry entry : internalSuites) {67            if (entry.getTestClass().equals(testClass)) {68                return entry.getTestChunks();69            }70        }71        return null;72    }73    public TestChunk getTestChunk(Method method) {74        for (TestChunk testChunk : getTestChunks()) {75            if (testChunk.isMethodToBeExecutedByThisClassloader(method)) {76                return testChunk;77            }78        }79        return null;80    }81    protected void chunkClass(final Class<?> testClass) throws Exception {82        List<Method> testMethodsForOtherClassLoaders = new ArrayList<Method>();83        MockTransformer[] extraMockTransformers = createDefaultExtraMockTransformers(testClass, testMethodsForOtherClassLoaders);84        final String[] ignorePackages = ignorePackagesExtractor.getPackagesToIgnore(testClass);85        final ClassLoader defaultMockLoader = createDefaultMockLoader(testClass, extraMockTransformers, ignorePackages);86        List<Method> currentClassloaderMethods = new LinkedList<Method>();87        // Put the first suite in the map of internal suites.88        TestChunk defaultTestChunk = new TestChunkImpl(defaultMockLoader, currentClassloaderMethods);89        List<TestChunk> testChunks = new LinkedList<TestChunk>();90        testChunks.add(defaultTestChunk);91        internalSuites.add(new TestCaseEntry(testClass, testChunks));92        initEntries(internalSuites);93        if (!currentClassloaderMethods.isEmpty()) {94            List<TestChunk> allTestChunks = internalSuites.get(0).getTestChunks();95            for (TestChunk chunk : allTestChunks.subList(1, allTestChunks.size())) {96                for (Method m : chunk.getTestMethodsToBeExecutedByThisClassloader()) {97                    testMethodsForOtherClassLoaders.add(m);98                }99            }100        } else if (2 <= internalSuites.size()101                           || 1 == internalSuites.size()102                                      && 2 <= internalSuites.get(0).getTestChunks().size()) {103            /*104             * If we don't have any test that should be executed by the default105             * class loader remove it to avoid duplicate test print outs.106             */107            internalSuites.get(0).getTestChunks().remove(0);108        }109        //else{ /*Delegation-runner maybe doesn't use test-method annotations!*/ }110    }111    private ClassLoader createDefaultMockLoader(Class<?> testClass, MockTransformer[] extraMockTransformers, String[] ignorePackages) {112        final ClassLoader defaultMockLoader;113        if (testClass.isAnnotationPresent(PrepareEverythingForTest.class)) {114            defaultMockLoader = createNewClassloader(testClass, new String[]{MockClassLoader.MODIFY_ALL_CLASSES},115                    ignorePackages, extraMockTransformers);116        } else {117            final String[] prepareForTestClasses = prepareForTestExtractor.getTestClasses(testClass);118            final String[] suppressStaticClasses = suppressionExtractor.getTestClasses(testClass);119            defaultMockLoader = createNewClassloader(testClass, arrayMerger.mergeArrays(String.class, prepareForTestClasses, suppressStaticClasses),120                    ignorePackages, extraMockTransformers);121        }122        return defaultMockLoader;123    }124    private ClassLoader createNewClassloader(Class<?> testClass, String[] classesToLoadByMockClassloader,125                                             final String[] packagesToIgnore, MockTransformer... extraMockTransformers) {126        final MockClassLoaderFactory classLoaderFactory = getMockClassLoaderFactory(testClass, classesToLoadByMockClassloader, packagesToIgnore, extraMockTransformers);127        return classLoaderFactory.create();128    }129    protected MockClassLoaderFactory getMockClassLoaderFactory(Class<?> testClass, String[] preliminaryClassesToLoadByMockClassloader, String[] packagesToIgnore, MockTransformer[] extraMockTransformers) {130        return new MockClassLoaderFactory(testClass, preliminaryClassesToLoadByMockClassloader, packagesToIgnore, extraMockTransformers);131    }132    private MockTransformer[] createDefaultExtraMockTransformers(Class<?> testClass, List<Method> testMethodsThatRunOnOtherClassLoaders) {133        if (null == testMethodAnnotation()) {134            return new MockTransformer[0];135        } else {136            return new MockTransformer[]{137                    TestClassTransformer138                            .forTestClass(testClass)139                            .removesTestMethodAnnotation(testMethodAnnotation())140                            .fromMethods(testMethodsThatRunOnOtherClassLoaders)141            };142        }143    }144    protected Class<? extends Annotation> testMethodAnnotation() {145        return null;146    }147    private void initEntries(List<TestCaseEntry> entries) {148        for (TestCaseEntry testCaseEntry : entries) {149            final Class<?> testClass = testCaseEntry.getTestClass();150            findMethods(testCaseEntry, testClass);151        }152    }153    private void findMethods(TestCaseEntry testCaseEntry, Class<?> testClass) {154        Method[] allMethods = testClass.getMethods();155        for (Method method : allMethods) {156            putMethodToChunk(testCaseEntry, testClass, method);157        }158        testClass = testClass.getSuperclass();159        if (!Object.class.equals(testClass)) {160            findMethods(testCaseEntry, testClass);161        }162    }163    private void putMethodToChunk(TestCaseEntry testCaseEntry, Class<?> testClass, Method method) {164        if (shouldExecuteTestForMethod(testClass, method)) {165            currentTestIndex++;166            if (hasChunkAnnotation(method)) {167                LinkedList<Method> methodsInThisChunk = new LinkedList<Method>();168                methodsInThisChunk.add(method);169                final String[] staticSuppressionClasses = getStaticSuppressionClasses(testClass, method);170                TestClassTransformer[] extraTransformers = null == testMethodAnnotation()171                                                                   ? new TestClassTransformer[0]172                                                                   : new TestClassTransformer[]{173                        TestClassTransformer.forTestClass(testClass)174                                            .removesTestMethodAnnotation(testMethodAnnotation())175                                .fromAllMethodsExcept(method)176                };177                final ClassLoader mockClassloader;178                if (method.isAnnotationPresent(PrepareEverythingForTest.class)) {179                    mockClassloader = createNewClassloader(testClass, new String[]{MockClassLoader.MODIFY_ALL_CLASSES},180                            ignorePackagesExtractor.getPackagesToIgnore(testClass), extraTransformers);181                } else {182                    mockClassloader = createNewClassloader(testClass, arrayMerger.mergeArrays(String.class, prepareForTestExtractor.getTestClasses(method),183                            staticSuppressionClasses), ignorePackagesExtractor.getPackagesToIgnore(testClass), extraTransformers);184                }185                TestChunkImpl chunk = new TestChunkImpl(mockClassloader, methodsInThisChunk);186                testCaseEntry.getTestChunks().add(chunk);187                updatedIndexes();...

Source:JavassistMockTransformerChainFactory.java

1/*2 *3 *   Copyright 2017 the original author or authors.4 *5 *   Licensed under the Apache License, Version 2.0 (the "License");6 *   you may not use this file except in compliance with the License.7 *   You may obtain a copy of the License at8 *9 *       http://www.apache.org/licenses/LICENSE-2.010 *11 *   Unless required by applicable law or agreed to in writing, software12 *   distributed under the License is distributed on an "AS IS" BASIS,13 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.14 *   See the License for the specific language governing permissions and15 *   limitations under the License.16 *17 */18package org.powermock.core.transformers.javassist;19import org.powermock.core.transformers.MockTransformer;20import org.powermock.core.transformers.MockTransformerChain;21import org.powermock.core.transformers.MockTransformerChainFactory;22import org.powermock.core.transformers.TransformStrategy;23import org.powermock.core.transformers.support.DefaultMockTransformerChain;24import org.powermock.core.transformers.support.DefaultMockTransformerChain.MockTransformerChainBuilder;25import java.util.List;26public class JavassistMockTransformerChainFactory implements MockTransformerChainFactory {27    28    private static final TransformStrategy DEFAULT = TransformStrategy.CLASSLOADER;29    30    @Override31    public MockTransformerChain createDefaultChain() {32        return createDefaultChain(DEFAULT);33    }34    35    @Override36    public MockTransformerChain createDefaultChain(final TransformStrategy transformStrategy) {37        return createDefaultChainBuilder(transformStrategy).build();38    }39    40    @Override41    public MockTransformerChain createDefaultChain(final List<MockTransformer> extraMockTransformers) {42        return createDefaultChainBuilder(DEFAULT)43                   .append(extraMockTransformers)44                   .build();45    }46    47    @Override48    public MockTransformerChain createTestClassChain(final MockTransformer testClassTransformer) {49        return createDefaultChainBuilder(DEFAULT)50                   .append(testClassTransformer)51                   .build();52    }53    54    private MockTransformerChainBuilder createDefaultChainBuilder(final TransformStrategy transformStrategy) {55        return DefaultMockTransformerChain.newBuilder()56                                          .append(new ClassFinalModifierMockTransformer(transformStrategy))57                                          .append(new ConstructorsMockTransformer(transformStrategy))58                                          .append(new InstrumentMockTransformer(transformStrategy))59                                          .append(new PackagePrivateClassesMockTransformer(transformStrategy))60                                          .append(new StaticFinalFieldsMockTransformer(transformStrategy))61                                          .append(new StaticFinalNativeMethodMockTransformer(transformStrategy))62                                          .append(new SuppressStaticInitializerMockTransformer(transformStrategy))63                                          .append(new MethodSizeMockTransformer(transformStrategy));64    }65}...

TestClassTransformer

Using AI Code Generation

1import org.powermock.core.transformers.impl.TestClassTransformer;2import org.powermock.core.PowerMock;3import org.powermock.core.classloader.MockClassLoader;4import org.powermock.core.classloader.annotations.PrepareForTest;5import org.powermock.core.classloader.annotations.PowerMockIgnore;6import org.powermock.core.classloader.annotations.PowerMockListener;7import org.powermock.core.classloader.annotations.PowerMockListeners;8import org.powermock.core.classloader.annotations.PowerMockRunnerDelegate;9import org.powermock.core.classloader.annotations.PowerMockRunnerDelegateClass;10import org.powermock.core.classloader.annotations.PrepareOnlyThisForTest;11import org.powermock.core.classloader.annotations.PrepareEverythingForTest;12import org.powermock.core.classloader.annotations.PrepareForTest;13import org.powermock.core.classloader.annotations.PowerMockIgnore;14import org.powermock.core.classloader.annotations.PowerMockListener;15import org.powermock.core.classloader.annotations.PowerMockListeners;16import org.powermock.core.classloader.annotations.PowerMockRunnerDelegate;17import org.powermock.core.classloader.annotations.PowerMockRunnerDelegateClass;18import org.powermock.core.classloader.annotations.PrepareOnlyThisForTest;19import org.powermock.core.classloader.annotations.PrepareEverythingForTest;

TestClassTransformer

Using AI Code Generation

1package com.powermock;2import java.lang.instrument.Instrumentation;3import java.util.logging.Logger;4import org.powermock.core.transformers.impl.TestClassTransformer;5public class Agent {6    private static final Logger LOG = Logger.getLogger(Agent.class.getName());7    public static void premain(String agentArgs, Instrumentation inst) {8        LOG.info("premain called");9        inst.addTransformer(new TestClassTransformer());10    }11}12package com.powermock;13import java.lang.instrument.Instrumentation;14import java.util.logging.Logger;15import org.powermock.core.transformers.impl.TestClassTransformer;16public class Agent {17    private static final Logger LOG = Logger.getLogger(Agent.class.getName());18    public static void premain(String agentArgs, Instrumentation inst) {19        LOG.info("premain called");20        inst.addTransformer(new TestClassTransformer());21    }22}23package com.powermock;24import java.lang.instrument.Instrumentation;25import java.util.logging.Logger;26import org.powermock.core.transformers.impl.TestClassTransformer;27public class Agent {28    private static final Logger LOG = Logger.getLogger(Agent.class.getName());29    public static void premain(String agentArgs, Instrumentation inst) {30        LOG.info("premain called");31        inst.addTransformer(new TestClassTransformer());32    }33}34package com.powermock;35import java.lang.instrument.Instrumentation;36import java.util.logging.Logger;37import org.powermock.core.transformers.impl.TestClassTransformer;38public class Agent {39    private static final Logger LOG = Logger.getLogger(Agent.class.getName());40    public static void premain(String agentArgs, Instrumentation inst) {41        LOG.info("premain called");42        inst.addTransformer(new TestClassTransformer());43    }44}45package com.powermock;46import java.lang.instrument.Instrumentation;47import java.util.logging.Logger;48import org.powermock.core.transformers.impl.TestClassTransformer;49public class Agent {50    private static final Logger LOG = Logger.getLogger(Agent.class.getName());51    public static void premain(String agentArgs, Instrumentation inst) {

TestClassTransformer

Using AI Code Generation

1public class TestClassTransformerTest {2    public void testClassTransformer() throws Exception {3        ClassLoader classLoader = getClass().getClassLoader();4        Class<?> clazz = classLoader.loadClass("com.example.TestClass");5        Class<?> transformedClass = TestClassTransformer.transform(clazz);6        Constructor<?> constructor = transformedClass.getConstructor();7        Object object = constructor.newInstance();8        Method method = transformedClass.getMethod("testMethod");9        method.invoke(object);10    }11}12public class TestClassTransformerTest {13    public void testClassTransformer() throws Exception {14        ClassLoader classLoader = getClass().getClassLoader();15        Class<?> clazz = classLoader.loadClass("com.example.TestClass");16        Class<?> transformedClass = TestClassTransformer.transform(clazz);17        Constructor<?> constructor = transformedClass.getConstructor();18        Object object = constructor.newInstance();19        Method method = transformedClass.getMethod("testMethod");20        method.invoke(object);21    }22}23public class TestClassTransformerTest {24    public void testClassTransformer() throws Exception {25        ClassLoader classLoader = getClass().getClassLoader();26        Class<?> clazz = classLoader.loadClass("com.example.TestClass");27        Class<?> transformedClass = TestClassTransformer.transform(clazz);28        Constructor<?> constructor = transformedClass.getConstructor();29        Object object = constructor.newInstance();30        Method method = transformedClass.getMethod("testMethod");31        method.invoke(object);32    }33}34public class TestClassTransformerTest {35    public void testClassTransformer() throws Exception {36        ClassLoader classLoader = getClass().getClassLoader();37        Class<?> clazz = classLoader.loadClass("com.example.TestClass");38        Class<?> transformedClass = TestClassTransformer.transform(clazz);39        Constructor<?> constructor = transformedClass.getConstructor();40        Object object = constructor.newInstance();41        Method method = transformedClass.getMethod("testMethod");42        method.invoke(object);

TestClassTransformer

Using AI Code Generation

1import org.powermock.core.transformers.impl.*;2import org.powermock.core.transformers.*;3import java.io.*;4public class 4 {5    public static void main(String[] args) throws Exception {6        TestClassTransformer transformer = new TestClassTransformer();7        byte[] transformed = transformer.transform(null, null, null, null, null);8        FileOutputStream fos = new FileOutputStream("TestClass.class");9        fos.write(transformed);10        fos.close();11    }12}

TestClassTransformer

Using AI Code Generation

1TestClassTransformer transformer = new TestClassTransformer();2Thread.currentThread().setContextClassLoader(transformer);3transformer.transform(null, new TestClassTransformer.ClassLoaderConfiguration(4    new String[] { "org.powermock.core.transformers.test.MockedClass" }, null));5ClassLoader classLoader = Thread.currentThread().getContextClassLoader();6URL[] urls = ((URLClassLoader) classLoader).getURLs();7for (URL url : urls) {8    System.out.println(url.getFile());9}10transformer.restore();11classLoader = Thread.currentThread().getContextClassLoader();12urls = ((URLClassLoader) classLoader).getURLs();13for (URL url : urls) {14    System.out.println(url.getFile());15}

TestClassTransformer

Using AI Code Generation

1public class TestClassTransformerTest {2    private static final String TEST_CLASS_NAME = "com.example.MyClass";3    private static final String TEST_CLASS_FILE_NAME = TEST_CLASS_NAME.replace('.',4'/') + ".class";5    private static final String TEST_CLASS_FILE = "target/classes/" + TEST_CLASS_FILE_NAME;6    public void testTransform() throws Exception {7        ClassLoader classLoader = TestClassTransformerTest.class.getClassLoader();8        ClassReader cr = new ClassReader(classLoader.getResourceAsStream(TEST_CLASS_FILE_NAME));9        ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS);10        TestClassTransformer transformer = new TestClassTransformer();11        cr.accept(transformer, ClassReader.EXPAND_FRAMES);12        transformer.transform(classLoader, TEST_CLASS_NAME, null, null, cw.toByteArray());13    }14}15public class MyClass {16    public static void main(String[] args) {17        System.out.println("Hello World");18    }19}20public class TestClassTransformerTest {21    private static final String TEST_CLASS_NAME = "com.example.MyClass";22    private static final String TEST_CLASS_FILE_NAME = TEST_CLASS_NAME.replace('.',23'/') + ".class";24    private static final String TEST_CLASS_FILE = "target/classes/" + TEST_CLASS_FILE_NAME;25    public void testTransform() throws Exception {26        ClassLoader classLoader = TestClassTransformerTest.class.getClassLoader();27        ClassReader cr = new ClassReader(classLoader.getResourceAsStream(TEST_CLASS_FILE_NAME));28        ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS);29        TestClassTransformer transformer = new TestClassTransformer();30        cr.accept(transformer, ClassReader.EXPAND_FRAMES);31        transformer.transform(classLoader, TEST_CLASS_NAME, null, null, cw.toByteArray());32    }33}34public class MyClass {35    public static void main(String[] args) {36        System.out.println("Hello World");37    }38}

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