binding/mdsal-binding-generator-impl/src/test/java/org/opendaylight/mdsal/binding/generator/util/JavassistUtilsTest.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.generator.util;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertFalse;
  12 import static org.junit.Assert.assertNotNull;
  13 import static org.mockito.Matchers.any;
  14 import static org.mockito.Mockito.doNothing;
  15 import static org.mockito.Mockito.mock;
  16
  17 import com.google.common.collect.ImmutableList;
  18 import javassist.ClassPool;
  19 import javassist.CtClass;
  20 import javassist.CtField;
  21 import javassist.bytecode.AccessFlag;
  22 import org.junit.Test;
  23 import org.opendaylight.mdsal.binding.generator.util.ClassCustomizer;
  24 import org.opendaylight.mdsal.binding.generator.util.ClassGenerator;
  25 import org.opendaylight.mdsal.binding.generator.util.JavassistUtils;
  26 import org.opendaylight.mdsal.binding.generator.util.MethodGenerator;
  27
  28 public class JavassistUtilsTest {
  29
  30     @Test
  31     public void forClassPool() throws Exception {
  32         final JavassistUtils javassistUtils = JavassistUtils.forClassPool(ClassPool.getDefault());
  33         final ClassGenerator classGenerator = mock(ClassGenerator.class);
  34         doNothing().when(classGenerator).process(any());
  35         final CtClass ctInterface = javassistUtils.createClass("TestInterface", classGenerator);
  36         ctInterface.setModifiers(AccessFlag.INTERFACE);
  37         final CtClass ctClass = javassistUtils.createClass("TestClass", ctInterface, classGenerator);
  38         javassistUtils.ensureClassLoader(ctClass.getClass());
  39         assertNotNull(ctClass);
  40         assertNotNull(javassistUtils.get(ClassPool.getDefault(), ctClass.getClass()));
  41
  42         CtField ctField = javassistUtils.field(ctClass, "testField", Object.class);
  43         assertEquals(ctField, ctClass.getField("testField"));
  44         ctField = javassistUtils.staticField(ctClass, "testStaticField", Object.class);
  45         assertEquals(ctField, ctClass.getField("testStaticField"));
  46
  47         final MethodGenerator methodGenerator = mock(MethodGenerator.class);
  48         doNothing().when(methodGenerator).process(any());
  49         javassistUtils.method(ctClass, Void.class, "testMethod", Object.class, methodGenerator);
  50         javassistUtils.method(ctInterface, Void.class, "testInterfaceMethod", Object.class, methodGenerator);
  51         javassistUtils.method(ctClass, Void.class, "testMethod2", ImmutableList.of(Object.class), methodGenerator);
  52         javassistUtils.staticMethod(ctClass, Void.class, "testStaticMethod", Object.class, methodGenerator);
  53         javassistUtils.implementMethodsFrom(ctClass, ctInterface, methodGenerator);
  54         assertNotNull(ctClass.getDeclaredMethod("testMethod"));
  55         assertNotNull(ctClass.getDeclaredMethod("testMethod2"));
  56         assertNotNull(ctClass.getDeclaredMethod("testStaticMethod"));
  57         assertNotNull(ctClass.getDeclaredMethod("testInterfaceMethod"));
  58
  59         final ClassCustomizer classCustomizer = mock(ClassCustomizer.class);
  60         doNothing().when(classCustomizer).customizeClass(any());
  61         assertNotNull(javassistUtils.instantiatePrototype("javassist.CtNewClass", "leWut", classCustomizer));
  62     }
  63
  64     @Test
  65     public void privateConstructTest() throws Exception {
  66         assertFalse(JavassistUtils.class.getDeclaredConstructor(ClassPool.class).isAccessible());
  67     }
  68 }