How to use MockClassLoader class of org.powermock.core.classloader package

Best Powermock code snippet using org.powermock.core.classloader.MockClassLoader

Source:AbstractTestSuiteChunkerImpl.java

...24import java.util.LinkedList;25import java.util.List;26import java.util.Set;27import java.util.Map.Entry;28import org.powermock.core.classloader.MockClassLoader;29import org.powermock.core.classloader.annotations.MockPolicy;30import org.powermock.core.classloader.annotations.PowerMockListener;31import org.powermock.core.classloader.annotations.PrepareEverythingForTest;32import org.powermock.core.classloader.annotations.PrepareForTest;33import org.powermock.core.classloader.annotations.PrepareOnlyThisForTest;34import org.powermock.core.classloader.annotations.SuppressStaticInitializationFor;35import org.powermock.core.classloader.interfaces.IPrepareEverythingForTest;36import org.powermock.core.spi.PowerMockPolicy;37import org.powermock.core.spi.PowerMockTestListener;38import org.powermock.core.transformers.MockTransformer;39import org.powermock.core.transformers.impl.MainMockTransformer;40import org.powermock.reflect.Whitebox;41import org.powermock.reflect.proxyframework.RegisterProxyFramework;42import org.powermock.tests.utils.ArrayMerger;43import org.powermock.tests.utils.IgnorePackagesExtractor;44import org.powermock.tests.utils.TestChunk;45import org.powermock.tests.utils.TestClassesExtractor;46import org.powermock.tests.utils.TestSuiteChunker;47/**48 * Abstract base class for test suite chunking, i.e. a suite is chunked into49 * several smaller pieces which are ran with different classloaders. A chunk is50 * defined by the {@link PrepareForTest} annotation. This to make sure that you51 * can byte-code manipulate classes in tests without impacting on other tests.52 * 53 */54public abstract class AbstractTestSuiteChunkerImpl<T> implements TestSuiteChunker {55    private static final int DEFAULT_TEST_LISTENERS_SIZE = 1;56    protected static final int NOT_INITIALIZED = -1;57    private static final int INTERNAL_INDEX_NOT_FOUND = NOT_INITIALIZED;58    protected final TestClassesExtractor prepareForTestExtractor = new PrepareForTestExtractorImpl();59    protected final TestClassesExtractor suppressionExtractor = new StaticConstructorSuppressExtractorImpl();60    private final IgnorePackagesExtractor ignorePackagesExtractor = new PowerMockIgnorePackagesExtractorImpl();61    private final ArrayMerger arrayMerger = new ArrayMergerImpl();62    private final Class<?>[] testClasses;63    /*64     * The classes listed in this set has been chunked and its delegates has65     * been created.66     */67    protected final Set<Class<?>> delegatesCreatedForTheseClasses = new LinkedHashSet<Class<?>>();68    // A list of junit delegates.69    protected final List<T> delegates = new LinkedList<T>();70    /*71     * Maps the list of test indexes that is assigned to a specific test suite72     * index.73     */74    protected final LinkedHashMap<Integer, List<Integer>> testAtDelegateMapper = new LinkedHashMap<Integer, List<Integer>>();75    private int currentTestIndex = NOT_INITIALIZED;76    /*77     * Maps between a specific class and a map of test methods loaded by a78     * specific mock class loader.79     */80    private final List<TestCaseEntry> internalSuites;81    protected volatile int testCount = NOT_INITIALIZED;82    protected AbstractTestSuiteChunkerImpl(Class<?> testClass) throws Exception {83        this(new Class[] { testClass });84    }85    protected AbstractTestSuiteChunkerImpl(Class<?>... testClasses) throws Exception {86        this.testClasses = testClasses;87        internalSuites = new LinkedList<TestCaseEntry>();88        for (Class<?> clazz : testClasses) {89            chunkClass(clazz);90        }91    }92    protected Object getPowerMockTestListenersLoadedByASpecificClassLoader(Class<?> clazz, ClassLoader classLoader) {93        try {94            int defaultListenerSize = DEFAULT_TEST_LISTENERS_SIZE;95            Class<?> annotationEnablerClass = null;96            try {97                annotationEnablerClass = Class.forName("org.powermock.api.extension.listener.AnnotationEnabler", false, classLoader);98            } catch (ClassNotFoundException e) {99                // Annotation enabler wasn't found in class path100                defaultListenerSize = 0;101            }102            registerProxyframework(classLoader);103            final Class<?> powerMockTestListenerType = Class.forName(PowerMockTestListener.class.getName(), false, classLoader);104            Object testListeners = null;105            if (clazz.isAnnotationPresent(PowerMockListener.class)) {106                PowerMockListener annotation = clazz.getAnnotation(PowerMockListener.class);107                final Class<? extends PowerMockTestListener>[] powerMockTestListeners = annotation.value();108                if (powerMockTestListeners.length > 0) {109                    testListeners = Array.newInstance(powerMockTestListenerType, powerMockTestListeners.length + defaultListenerSize);110                    for (int i = 0; i < powerMockTestListeners.length; i++) {111                        String testListenerClassName = powerMockTestListeners[i].getName();112                        final Class<?> listenerTypeLoadedByClassLoader = Class.forName(testListenerClassName, false, classLoader);113                        Array.set(testListeners, i, Whitebox.newInstance(listenerTypeLoadedByClassLoader));114                    }115                }116            } else {117                testListeners = Array.newInstance(powerMockTestListenerType, defaultListenerSize);118            }119            // Add default annotation enabler listener120            if (annotationEnablerClass != null) {121                Array.set(testListeners, Array.getLength(testListeners) - 1, Whitebox.newInstance(annotationEnablerClass));122            }123            return testListeners;124        } catch (ClassNotFoundException e) {125            throw new IllegalStateException("PowerMock internal error: Failed to load class.", e);126        }127    }128    private void registerProxyframework(ClassLoader classLoader) {129        Class<?> proxyFrameworkClass = null;130        try {131            proxyFrameworkClass = Class.forName("org.powermock.api.extension.proxyframework.ProxyFrameworkImpl", false, classLoader);132        } catch (ClassNotFoundException e) {133            throw new IllegalStateException(134                    "Extension API internal error: org.powermock.api.extension.proxyframework.ProxyFrameworkImpl could not be located in classpath.");135        }136        Class<?> proxyFrameworkRegistrar = null;137        try {138            proxyFrameworkRegistrar = Class.forName(RegisterProxyFramework.class.getName(), false, classLoader);139        } catch (ClassNotFoundException e) {140            // Should never happen141            throw new RuntimeException(e);142        }143        try {144            Whitebox.invokeMethod(proxyFrameworkRegistrar, "registerProxyFramework", Whitebox.newInstance(proxyFrameworkClass));145        } catch (RuntimeException e) {146            throw e;147        } catch (Exception e) {148            throw new RuntimeException(e);149        }150    }151    protected void chunkClass(final Class<?> testClass) throws Exception {152        ClassLoader defaultMockLoader = null;153        final String[] ignorePackages = ignorePackagesExtractor.getPackagesToIgnore(testClass);154        if (testClass.isAnnotationPresent(PrepareEverythingForTest.class) || IPrepareEverythingForTest.class.isAssignableFrom(testClass)) {155            defaultMockLoader = createNewClassloader(testClass, new String[] { MockClassLoader.MODIFY_ALL_CLASSES }, ignorePackages);156        } else {157            final String[] prepareForTestClasses = prepareForTestExtractor.getTestClasses(testClass);158            final String[] suppressStaticClasses = suppressionExtractor.getTestClasses(testClass);159            defaultMockLoader = createNewClassloader(testClass, arrayMerger.mergeArrays(String.class, prepareForTestClasses, suppressStaticClasses),160                    ignorePackages);161            if (defaultMockLoader instanceof MockClassLoader) {162                // Test class should always be prepared163                ((MockClassLoader) defaultMockLoader).addClassesToModify(testClass.getName());164            }165        }166        registerProxyframework(defaultMockLoader);167        List<Method> currentClassloaderMethods = new LinkedList<Method>();168        // Put the first suite in the map of internal suites.169        TestChunk defaultTestChunk = new TestChunkImpl(defaultMockLoader, currentClassloaderMethods);170        List<TestChunk> testChunks = new LinkedList<TestChunk>();171        testChunks.add(defaultTestChunk);172        internalSuites.add(new TestCaseEntry(testClass, testChunks));173        initEntries(internalSuites);174        /*175         * If we don't have any test that should be executed by the default176         * class loader remove it to avoid duplicate test print outs.177         */178        if (currentClassloaderMethods.isEmpty()) {179            internalSuites.get(0).getTestChunks().remove(0);180        }181    }182    public ClassLoader createNewClassloader(Class<?> testClass, final String[] classesToLoadByMockClassloader, final String[] packagesToIgnore) {183        ClassLoader mockLoader = null;184        if ((classesToLoadByMockClassloader == null || classesToLoadByMockClassloader.length == 0) && !hasMockPolicyProvidedClasses(testClass)) {185            mockLoader = Thread.currentThread().getContextClassLoader();186        } else {187            List<MockTransformer> mockTransformerChain = new ArrayList<MockTransformer>();188            final MainMockTransformer mainMockTransformer = new MainMockTransformer();189            mockTransformerChain.add(mainMockTransformer);190            mockLoader = AccessController.doPrivileged(new PrivilegedAction<MockClassLoader>() {191                public MockClassLoader run() {192                    return new MockClassLoader(classesToLoadByMockClassloader, packagesToIgnore);193                }194            });195            MockClassLoader mockClassLoader = (MockClassLoader) mockLoader;196            mockClassLoader.setMockTransformerChain(mockTransformerChain);197            if (!mockClassLoader.shouldModifyAll()) {198                // Always prepare test class for testing if not all classes are199                // prepared200                mockClassLoader.addClassesToModify(testClass.getName());201            }202            new MockPolicyInitializerImpl(testClass).initialize(mockLoader);203        }204        return mockLoader;205    }206    /**207     * {@inheritDoc}208     */209    public void createTestDelegators(Class<?> testClass, List<TestChunk> chunks) throws Exception {210        for (TestChunk chunk : chunks) {211            ClassLoader classLoader = chunk.getClassLoader();212            List<Method> methodsToTest = chunk.getTestMethodsToBeExecutedByThisClassloader();213            T runnerDelegator = createDelegatorFromClassloader(classLoader, testClass, methodsToTest);214            delegates.add(runnerDelegator);215        }216        delegatesCreatedForTheseClasses.add(testClass);217    }218    protected abstract T createDelegatorFromClassloader(ClassLoader classLoader, Class<?> testClass, final List<Method> methodsToTest)219            throws Exception;220    private void initEntries(List<TestCaseEntry> entries) throws Exception {221        for (TestCaseEntry testCaseEntry : entries) {222            final Class<?> testClass = testCaseEntry.getTestClass();223            Method[] allMethods = testClass.getMethods();224            for (Method method : allMethods) {225                if (shouldExecuteTestForMethod(testClass, method)) {226                    currentTestIndex++;227                    if (hasChunkAnnotation(method)) {228                        LinkedList<Method> methodsInThisChunk = new LinkedList<Method>();229                        methodsInThisChunk.add(method);230                        final String[] staticSuppressionClasses = getStaticSuppressionClasses(testClass, method);231                        ClassLoader mockClassloader = null;232                        if (method.isAnnotationPresent(PrepareEverythingForTest.class)) {233                            mockClassloader = createNewClassloader(testClass, new String[] { MockClassLoader.MODIFY_ALL_CLASSES },234                                    ignorePackagesExtractor.getPackagesToIgnore(testClass));235                        } else {236                            mockClassloader = createNewClassloader(testClass, arrayMerger.mergeArrays(String.class, prepareForTestExtractor237                                    .getTestClasses(method), staticSuppressionClasses), ignorePackagesExtractor.getPackagesToIgnore(testClass));238                        }239                        TestChunkImpl chunk = new TestChunkImpl(mockClassloader, methodsInThisChunk);240                        testCaseEntry.getTestChunks().add(chunk);241                        updatedIndexes();242                    } else {243                        testCaseEntry.getTestChunks().get(0).getTestMethodsToBeExecutedByThisClassloader().add(method);244                        // currentClassloaderMethods.add(method);245                        final int currentDelegateIndex = internalSuites.size() - 1;246                        /*247                         * Add this test index to the main junit runner...

Source:MockClassLoaderTest.java

1package dux.org.powermock.core.classloader;23import org.junit.Before;4import org.junit.Test;5import org.powermock.core.classloader.MockClassLoader;67import com.github.docteurdux.test.AbstractTest;89public class MockClassLoaderTest extends AbstractTest {1011	public static class A {12		public String foo() {13			return "foo";14		}15	}1617	@Before18	public void before() {19		requireSources("powermock-core-1.6.4", MockClassLoader.class);20	}2122	@Test23	public void test() throws Exception {24		MockClassLoader mcl = new MockClassLoader(25				new String[] { "dux.org.powermock.core.classloader.MockClassLoaderTest$A" });26		ClassLoader cl = mcl;27		Class<?> clazz = cl.loadClass("dux.org.powermock.core.classloader.MockClassLoaderTest$A");28		Object o = clazz.newInstance();2930	}31}
...

MockClassLoader

Using AI Code Generation

1public class 4 {2    public static void main(String[] args) throws Exception {3        MockClassLoader mockClassLoader = new MockClassLoader();4        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");5        System.out.println(clazz);6    }7}8public class 5 {9    public static void main(String[] args) throws Exception {10        MockClassLoader mockClassLoader = new MockClassLoader();11        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");12        System.out.println(clazz);13    }14}15public class 6 {16    public static void main(String[] args) throws Exception {17        MockClassLoader mockClassLoader = new MockClassLoader();18        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");19        System.out.println(clazz);20    }21}22public class 7 {23    public static void main(String[] args) throws Exception {24        MockClassLoader mockClassLoader = new MockClassLoader();25        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");26        System.out.println(clazz);27    }28}29public class 8 {30    public static void main(String[] args) throws Exception {31        MockClassLoader mockClassLoader = new MockClassLoader();32        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");33        System.out.println(clazz);34    }35}36public class 9 {37    public static void main(String[] args) throws Exception {38        MockClassLoader mockClassLoader = new MockClassLoader();39        Class<?> clazz = mockClassLoader.loadClass("org.powermock.core.classloader.MockClassLoader");40        System.out.println(clazz);41    }42}43public class 10 {44    public static void main(String[] args) throws Exception {45        MockClassLoader mockClassLoader = new MockClassLoader();

MockClassLoader

Using AI Code Generation

1package org.powermock.core.classloader;2import java.io.IOException;3import java.io.InputStream;4import java.net.URL;5import java.net.URLConnection;6import java.net.URLStreamHandler;7import java.util.HashMap;8import java.util.Map;9public class MockClassLoader extends ClassLoader {10    private final Map<String, byte[]> byteCodeMap = new HashMap<String, byte[]>();11    public MockClassLoader() {12        super(MockClassLoader.class.getClassLoader());13    }14    public void addClass(String className, byte[] byteCode) {15        byteCodeMap.put(className, byteCode);16    }17    protected Class<?> findClass(String name) throws ClassNotFoundException {18        byte[] byteCode = byteCodeMap.get(name);19        if (byteCode == null) {20            throw new ClassNotFoundException(name);21        }22        return defineClass(name, byteCode, 0, byteCode.length);23    }24    public URL getResource(String name) {25        if (byteCodeMap.containsKey(name)) {26            try {27                return new URL(null, name, new URLStreamHandler() {28                    protected URLConnection openConnection(URL u) throws IOException {29                        return new URLConnection(u) {30                            public void connect() throws IOException {31                            }32                            public InputStream getInputStream() throws IOException {33                                return new InputStream() {34                                    private int index;35                                    public int read() throws IOException {36                                        return index < byteCodeMap.get(name).length ? byteCodeMap.get(name)[index++]37                                                : -1;38                                    }39                                };40                            }41                        };42                    }43                });44            } catch (Exception e) {45                throw new RuntimeException(e);46            }47        } else {48            return super.getResource(name);49        }50    }51}52import java.io.ByteArrayOutputStream;53import java.io.IOException;54import java.io.InputStream;55import java.lang.reflect.InvocationTargetException;56import java.lang.reflect.Method;57import java.net.URL;58import java.net.URLClassLoader;59import org.powermock.core.classloader.MockClassLoader;60public class TestMockClassLoader {61    public static void main(String[] args) throws Exception {62        URLClassLoader classLoader = new URLClassLoader(new URL[] { new URL("file:/C:/") });63        MockClassLoader mockClassLoader = new MockClassLoader();64        mockClassLoader.addClass("MyClass", getByteCode());

MockClassLoader

Using AI Code Generation

1package com.journaldev.powermock;2import java.lang.reflect.Method;3import org.powermock.core.classloader.MockClassLoader;4public class MockClassLoaderTest {5    public static void main(String[] args) throws Exception {6        String className = "com.journaldev.powermock.TestClass";7        String methodName = "test";8        byte[] classBytes = new byte[] {-54, -2, -70, -66, 0, 0, 0, 52, 0, 18, 10, 0, 3, 0, 4, 7, 0, 5, 7, 0, 6, 1, 0, 4, 116, 101, 115, 116, 1, 0, 3, 40, 41, 86, 1, 0, 4, 67, 111, 100, 101, 1, 0, 15, 76, 105, 110, 101, 78, 117, 109, 98, 101, 114, 84, 97, 98, 108, 101, 1, 0, 4, 109, 97, 105, 110, 1, 0, 22, 40, 91, 76, 106, 97, 118, 97, 47, 108, 97, 110, 103, 47, 83, 116, 114, 105, 110, 103, 59, 41, 86, 12, 0, 7, 0, 8, 1, 0, 16, 106, 97, 118, 97, 47, 108, 97, 110, 103, 47, 79, 98, 106, 101, 99, 116, 1, 0, 19, 106, 97, 118, 97, 47, 108, 97, 110, 103, 47, 83, 121, 115, 116, 101, 109, 7, 0, 10, 12, 0

MockClassLoader

Using AI Code Generation

1public class TestClass {2    public static void main(String args[]) throws Exception {3        MockClassLoader mockClassLoader = new MockClassLoader();4        Class<?> clazz = mockClassLoader.loadClass("com.test.Test");5        Method method = clazz.getMethod("test");6        method.invoke(clazz.newInstance());7    }8}9public class TestClass {10    public static void main(String args[]) throws Exception {11        MockClassLoader mockClassLoader = new MockClassLoader();12        Class<?> clazz = mockClassLoader.loadClass("com.test.Test");13        Method method = clazz.getMethod("test");14        method.invoke(clazz.newInstance());15    }16}17public class TestClass {18    public static void main(String args[]) throws Exception {19        MockClassLoader mockClassLoader = new MockClassLoader();20        Class<?> clazz = mockClassLoader.loadClass("com.test.Test");21        Method method = clazz.getMethod("test");22        method.invoke(clazz.newInstance());23    }24}25public class TestClass {26    public static void main(String args[]) throws Exception {27        MockClassLoader mockClassLoader = new MockClassLoader();28        Class<?> clazz = mockClassLoader.loadClass("com.test.Test");29        Method method = clazz.getMethod("test");30        method.invoke(clazz.newInstance());31    }32}33public class TestClass {34    public static void main(String args[]) throws Exception {35        MockClassLoader mockClassLoader = new MockClassLoader();36        Class<?> clazz = mockClassLoader.loadClass("com.test.Test");37        Method method = clazz.getMethod("test");38        method.invoke(clazz.newInstance());39    }40}41public class TestClass {42    public static void main(String args[]) throws Exception {43        MockClassLoader mockClassLoader = new MockClassLoader();44        Class<?> clazz = mockClassLoader.loadClass("com.test.Test

MockClassLoader

Using AI Code Generation

1@PrepareForTest(value = {4.class}, loader = MockClassLoader.class, path = "path to the class to be loaded")2public class 4Test {3    public void test() {4    }5}6public class 5 {7    public static String staticMethod() {8        return "static method";9    }10}11@RunWith(PowerMockRunner.class)12@PrepareForTest({5.class})13public class 5Test {14    public void testStaticMethod() {15        PowerMockito.mockStatic(5.class);16        when(5.staticMethod()).thenReturn("mocked static method");17        String result = 5.staticMethod();18        assertEquals("mocked static method", result);19    }20}21public final class 6 {22    public String method() {23        return "method";24    }25}26@RunWith(PowerMockRunner.class)27@PrepareForTest({6.class})28public class 6Test {29    public void testMethod() {

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