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

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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.

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/*
 * Copyright (c) 2006-2013 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.startup;

import java.io.*;

import mockit.integration.junit3.internal.*;
import mockit.integration.junit4.internal.*;
import mockit.integration.testng.internal.*;
import mockit.internal.*;
import mockit.internal.annotations.*;
import mockit.internal.util.*;

final class JMockitInitialization
{
   private static final String[] NO_STUBBING_FILTERS = {};
   private final StartupConfiguration config;

   JMockitInitialization() throws IOException { config = new StartupConfiguration(); }

   void initialize(boolean initializeTestNG)
   {
      MockingBridge.preventEventualClassLoadingConflicts();
      loadInternalStartupMocksForJUnitIntegration();

      if (initializeTestNG && MockTestNG.hasDependenciesInClasspath()) {
         setUpInternalStartupMock(MockTestNG.class);
      }

      loadExternalToolsIfAny();
      stubOutClassesIfAny();
      setUpStartupMocksIfAny();
   }

   private void loadInternalStartupMocksForJUnitIntegration()
   {
      if (setUpInternalStartupMock(TestSuiteDecorator.class)) {
         try {
            setUpInternalStartupMock(MockTestCase.class);
         }
         catch (VerifyError ignore) {
            // For some reason, this error occurs when running TestNG tests from Maven.
         }

         if (!setUpInternalStartupMock(RunNotifierDecorator.class)) return;
         if (!setUpInternalStartupMock(BlockJUnit4ClassRunnerDecorator.class)) return;
         setUpInternalStartupMock(MockFrameworkMethod.class);
      }
   }

   private boolean setUpInternalStartupMock(Class mockClass)
   {
      // The startup mock is ignored if the necessary third-party class files are not in the classpath.
      try {
         applyMockClass(mockClass);
         return true;
      }
      catch (TypeNotPresentException ignore) { return false; }
      catch (NoClassDefFoundError ignore) { return false; }
   }

   private void applyMockClass(Class mockClass)
   {
      MockClassSetup setup;

      //noinspection UnnecessaryFullyQualifiedName
      if (mockit.MockUp.class.isAssignableFrom(mockClass)) {
         Object mockUp = ConstructorReflection.newInstance(mockClass);
         setup = new MockClassSetup(mockUp);
      }
      else {
         setup = new MockClassSetup(mockClass);
      }

      setup.setUpStartupMock();
   }

   private void loadExternalToolsIfAny()
   {
      for (String toolClassName : config.externalTools) {
         try {
            new ToolLoader(toolClassName).loadTool();
         }
         catch (Throwable unexpectedFailure) {
            StackTrace.filterStackTrace(unexpectedFailure);
            unexpectedFailure.printStackTrace();
         }
      }
   }

   private void stubOutClassesIfAny()
   {
      for (String stubbing : config.classesToBeStubbedOut) {
         int p = stubbing.indexOf('#');
         String realClassName = stubbing;
         String[] filters = NO_STUBBING_FILTERS;

         if (p > 0) {
            realClassName = stubbing.substring(0, p);
            filters = stubbing.substring(p + 1).split("\\|");
         }

         Class realClass = ClassLoad.loadClass(realClassName.trim());
         new ClassStubbing(realClass, filters).stubOutAtStartup();
      }
   }

   private void setUpStartupMocksIfAny()
   {
      for (String mockClassName : config.mockClasses) {
         try {
            Class mockClass = ClassLoad.loadClass(mockClassName);
            applyMockClass(mockClass);
         }
         catch (UnsupportedOperationException ignored) {}
         catch (Throwable unexpectedFailure) {
            StackTrace.filterStackTrace(unexpectedFailure);
            unexpectedFailure.printStackTrace();
         }
      }
   }
}