mockit.internal.startup.JMockitTransformer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jmockit Show documentation

JMockit is a Java toolkit for developer (unit/integration) testing. It contains mocking APIs and other tools, supporting both JUnit and TestNG. The mocking APIs allow all kinds of Java code, without testability restrictions, to be tested in isolation from selected dependencies.

There is a newer version: 1.7

Show newest version

/*
 * Copyright (c) 2006-2011 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.startup;

import java.lang.instrument.*;
import java.net.*;
import java.security.*;

import mockit.internal.state.*;
import mockit.internal.util.*;

final class JMockitTransformer implements ClassFileTransformer
{
   public byte[] transform(
      ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain,
      byte[] classfileBuffer)
   {
      if (classBeingRedefined == null) {
         if (!registerClassIfProxy(className, classfileBuffer)) {
            enableAssertsIfTestClass(loader, protectionDomain, className);
         }
      }

      return null;
   }

   private boolean registerClassIfProxy(String className, byte[] classfileBuffer)
   {
      String proxyClassName = null;
      int p = className.indexOf("$Proxy");

      if (p >= 0 && Utilities.hasPositiveDigit(className, p + 5)) {
         if (p == 0) {
            proxyClassName = className;
         }
         else if (className.charAt(p - 1) == '/') {
            proxyClassName = className.replace('/', '.');
         }
      }

      if (proxyClassName != null) {
         TestRun.proxyClasses().add(proxyClassName, classfileBuffer);
         return true;
      }

      return false;
   }

   private void enableAssertsIfTestClass(ClassLoader loader, ProtectionDomain protectionDomain, String className)
   {
      if (
         loader != null && protectionDomain != null &&
         (className.endsWith("Test") || isFromTestClassesDirectory(protectionDomain))
      ) {
         loader.setClassAssertionStatus(className.replace('/', '.'), true);
      }
   }

   private boolean isFromTestClassesDirectory(ProtectionDomain protectionDomain)
   {
      CodeSource codeSource = protectionDomain.getCodeSource();

      if (codeSource == null) {
         return false;
      }

      URL location = codeSource.getLocation();

      return location != null && location.getPath().endsWith("/test-classes/");
   }
}