How to use MethodSizeMockTransformer class of org.powermock.core.transformers.javassist package

Best Powermock code snippet using org.powermock.core.transformers.javassist.MethodSizeMockTransformer

Source:JavassistMockTransformerChainFactory.java

...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}...

Source:MethodSizeMockTransformer.java

...32 * Method is then instrumented again to allow mocking and suppression.33 *34 * @see <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3">JVM specification</a>35 */36public class MethodSizeMockTransformer extends MethodMockTransformer {37    38    private static final int MAX_METHOD_CODE_LENGTH_LIMIT = 65536;39    40    public MethodSizeMockTransformer(final TransformStrategy strategy) {41        super(strategy);42    }43    44    public CtClass transform(final CtClass clazz) throws CannotCompileException, NotFoundException {45        for (CtMethod method : clazz.getDeclaredMethods()) {46            if (isMethodSizeExceeded(method)) {47                String code = "{throw new IllegalAccessException(\"" +48                                  "Method was too large and after instrumentation exceeded JVM limit. " +49                                  "PowerMock modified the method to allow JVM to load the class. " +50                                  "You can use PowerMock API to suppress or mock this method behaviour." +51                                  "\");}";52                method.setBody(code);53                modifyMethod(method);54            }...

MethodSizeMockTransformer

Using AI Code Generation

1import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;2public class 4 {3    public static void main(String[] args) {4        MethodSizeMockTransformer methodSizeMockTransformer = new MethodSizeMockTransformer();5        System.out.println(methodSizeMockTransformer);6    }7}8import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;9public class 5 {10    public static void main(String[] args) {11        MethodSizeMockTransformer methodSizeMockTransformer = new MethodSizeMockTransformer();12        System.out.println(methodSizeMockTransformer);13    }14}15import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;16public class 6 {17    public static void main(String[] args) {18        MethodSizeMockTransformer methodSizeMockTransformer = new MethodSizeMockTransformer();19        System.out.println(methodSizeMockTransformer);20    }21}22import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;23public class 7 {24    public static void main(String[] args) {25        MethodSizeMockTransformer methodSizeMockTransformer = new MethodSizeMockTransformer();26        System.out.println(methodSizeMockTransformer);27    }28}29import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;30public class 8 {31    public static void main(String[] args) {32        MethodSizeMockTransformer methodSizeMockTransformer = new MethodSizeMockTransformer();33        System.out.println(methodSizeMockTransformer);34    }35}

MethodSizeMockTransformer

Using AI Code Generation

1import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;2public class 4 {3  public static void main(String[] args) {4    try {5      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();6    } catch (Exception e) {7      e.printStackTrace();8    }9  }10}11import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;12public class 5 {13  public static void main(String[] args) {14    try {15      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();16    } catch (Exception e) {17      e.printStackTrace();18    }19  }20}21import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;22public class 6 {23  public static void main(String[] args) {24    try {25      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();26    } catch (Exception e) {27      e.printStackTrace();28    }29  }30}31import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;32public class 7 {33  public static void main(String[] args) {34    try {35      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();36    } catch (Exception e) {37      e.printStackTrace();38    }39  }40}41import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;42public class 8 {43  public static void main(String[] args) {44    try {45      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();46    } catch (Exception e) {47      e.printStackTrace();48    }49  }50}51import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;52public class 9 {53  public static void main(String[] args) {54    try {55      MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();56    } catch (Exception e) {

MethodSizeMockTransformer

Using AI Code Generation

1import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;2import org.powermock.core.transformers.javassist.MethodSizeMockTransformerFactory;3public class TestClass {4    public static void main(String[] args) {5        MethodSizeMockTransformerFactory methodSizeMockTransformerFactory = new MethodSizeMockTransformerFactory();6        MethodSizeMockTransformer methodSizeMockTransformer = methodSizeMockTransformerFactory.create();7        System.out.println("MethodSizeMockTransformer class is: " + methodSizeMockTransformer.getClass());8    }9}

MethodSizeMockTransformer

Using AI Code Generation

1package com.powermock;2import java.lang.reflect.Method;3import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;4public class MethodSizeMockTransformerTest {5    public static void main(String[] args) throws Exception {6        MethodSizeMockTransformer transformer = new MethodSizeMockTransformer();7        Method method = MethodSizeMockTransformerTest.class.getMethod("testMethod");8        transformer.transformMethod(method);9    }10    public void testMethod() throws Exception {11        System.out.println("Inside testMethod");12    }13}

MethodSizeMockTransformer

Using AI Code Generation

1package com.powermock;2import java.lang.instrument.ClassFileTransformer;3import java.lang.instrument.IllegalClassFormatException;4import java.security.ProtectionDomain;5import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;6public class Agent {7    public static void premain(String agentArgs, Instrumentation inst) {8        inst.addTransformer(new ClassFileTransformer() {9            public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,

MethodSizeMockTransformer

Using AI Code Generation

1package com.example;2import java.util.ArrayList;3import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;4import org.powermock.core.transformers.javassist.JavassistMockTransformer;5import javassist.ClassPool;6import javassist.CtClass;7import javassist.CtMethod;8import javassist.CtNewMethod;9public class Main {10    public static void main(String[] args) throws Exception {11        ClassPool pool = ClassPool.getDefault();12        CtClass cc = pool.get("java.util.ArrayList");13        CtMethod m = CtNewMethod.make("public int size() { return 20; }", cc);14        cc.addMethod(m);15        JavassistMockTransformer transformer = new MethodSizeMockTransformer();16        transformer.transform(cc);17        cc.writeFile("/tmp");18        Class<?> clazz = Class.forName("java.util.ArrayList");19        ArrayList<?> list = (ArrayList<?>) clazz.newInstance();20        System.out.println(list.size());21    }22}23package com.example;24import java.util.ArrayList;25import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;26import org.powermock.core.transformers.javassist.JavassistMockTransformer;27import javassist.ClassPool;28import javassist.CtClass;29import javassist.CtMethod;30import javassist.CtNewMethod;31public class Main {32    public static void main(String[] args) throws Exception {33        ClassPool pool = ClassPool.getDefault();34        CtClass cc = pool.get("java.util.ArrayList");35        CtMethod m = CtNewMethod.make("public int size() { return 20; }", cc);36        cc.addMethod(m);37        JavassistMockTransformer transformer = new MethodSizeMockTransformer();38        transformer.transform(cc);39        cc.writeFile("/tmp");40        Class<?> clazz = Class.forName("java.util.ArrayList");41        ArrayList<?> list = (ArrayList<?>) clazz.newInstance();42        System.out.println(list.size());43    }44}45package com.example;46import java.util.ArrayList;47import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;48import org.power

MethodSizeMockTransformer

Using AI Code Generation

1import org.powermock.core.transformers.javassist.MethodSizeMockTransformer;2import org.powermock.core.transformers.javassist.MockTransformerChain;3import org.powermock.core.transformers.javassist.MethodMockTransformer;4import javassist.ClassPool;5import javassist.CtClass;6import javassist.CtMethod;7import javassist.CtConstructor;8import javassist.CtField;9import javassist.CtNewMethod;10import javassist.Modifier;11import java.io.IOException;12import java.lang.reflect.Method;13import java.util.ArrayList;14import java.util.HashMap;15import java.util.Map;16import java.util.List;17public class MethodSizeMockTransformer implements MethodMockTransformer {18public void transform(CtClass clazz, ClassPool classPool, MockTransformerChain chain)19throws Exception {20String className = clazz.getName();21String methodName = chain.getMockMethodName();22Class<?>[] parameterTypes = chain.getMockMethodParameterTypes();23Class<?> methodClass = chain.getMockMethodClass();24if (methodClass.equals(ArrayList.class)) {25if (methodName.equals("size")) {26CtMethod method = clazz.getDeclaredMethod(methodName);27String body = method.getMethodInfo().getCodeAttribute().toString();28int returnIndex = body.indexOf("return");29String returnString = body.substring(returnIndex);30method.getMethodInfo().getCodeAttribute().setCode((body.replace(returnString, "return 0;")).getBytes());31}32}33chain.transform(clazz, classPool);34}35}

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