mockit.integration.junit4.internal.JUnit4TestRunnerDecorator 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) 2006-2014 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.integration.junit4.internal;

import java.lang.reflect.*;

import org.jetbrains.annotations.*;

import org.junit.*;
import org.junit.runners.Suite.*;
import org.junit.runners.model.*;

import mockit.integration.internal.*;
import mockit.internal.expectations.*;
import mockit.internal.mockups.*;
import mockit.internal.state.*;
import mockit.internal.util.*;

final class JUnit4TestRunnerDecorator extends TestRunnerDecorator
{
   /**
    * A "volatile boolean" is as good as a java.util.concurrent.atomic.AtomicBoolean here,
    * since we only need the basic get/set operations.
    */
   private volatile boolean shouldPrepareForNextTest = true;

   @Nullable
   Object invokeExplosively(@NotNull MockInvocation invocation, @Nullable Object target, Object... params)
      throws Throwable
   {
      FrameworkMethod it = invocation.getInvokedInstance();
      Method method = it.getMethod();
      Class testClass = target == null ? method.getDeclaringClass() : target.getClass();

      handleMockingOutsideTestMethods(it, target, testClass);

      // In case it isn't a test method, but a before/after method:
      if (it.getAnnotation(Test.class) == null) {
         if (shouldPrepareForNextTest && it.getAnnotation(Before.class) != null) {
            prepareForNextTest();
            shouldPrepareForNextTest = false;
         }

         TestRun.setRunningIndividualTest(target);
         TestRun.setSavePointForTestMethod(null);

         try {
            invocation.prepareToProceed();
            return it.invokeExplosively(target, params);
         }
         catch (Throwable t) {
            RecordAndReplayExecution.endCurrentReplayIfAny();
            StackTrace.filterStackTrace(t);
            throw t;
         }
         finally {
            if (it.getAnnotation(After.class) != null) {
               shouldPrepareForNextTest = true;
            }
         }
      }

      if (shouldPrepareForNextTest) {
         prepareForNextTest();
      }

      shouldPrepareForNextTest = true;
      assert target != null;

      try {
         executeTestMethod(invocation, target, params);
         return null; // it's a test method, therefore has void return type
      }
      catch (Throwable t) {
         StackTrace.filterStackTrace(t);
         throw t;
      }
      finally {
         TestRun.finishCurrentTestExecution(true);
      }
   }

   private void handleMockingOutsideTestMethods(
      @NotNull FrameworkMethod it, @Nullable Object target, @NotNull Class testClass)
   {
      TestRun.enterNoMockingZone();

      try {
         if (target == null) {
            Class currentTestClass = TestRun.getCurrentTestClass();

            if (currentTestClass != null && testClass.isAssignableFrom(currentTestClass)) {
               if (it.getAnnotation(AfterClass.class) != null) {
                  cleanUpMocksFromPreviousTestClass();
               }
            }
            else if (testClass.isAnnotationPresent(SuiteClasses.class)) {
               setUpClassLevelMocksAndStubs(testClass);
            }
            else if (it.getAnnotation(BeforeClass.class) != null) {
               updateTestClassState(null, testClass);
            }
         }
         else {
            updateTestClassState(target, testClass);
         }
      }
      finally {
         TestRun.exitNoMockingZone();
      }
   }

   private void executeTestMethod(@NotNull MockInvocation invocation, @NotNull Object target, Object... parameters)
      throws Throwable
   {
      SavePoint savePoint = new SavePoint();
      TestRun.setSavePointForTestMethod(savePoint);
      TestRun.setRunningIndividualTest(target);

      FrameworkMethod it = invocation.getInvokedInstance();
      Method testMethod = it.getMethod();
      Throwable testFailure = null;
      boolean testFailureExpected = false;

      try {
         Object[] mockParameters = createInstancesForMockParameters(target, testMethod, parameters, savePoint);
         createInstancesForTestedFields(target);

         invocation.prepareToProceed();

         Object[] params = mockParameters == null ? parameters : mockParameters;
         it.invokeExplosively(target, params);
      }
      catch (Throwable thrownByTest) {
         testFailure = thrownByTest;
         Class expectedType = testMethod.getAnnotation(Test.class).expected();
         testFailureExpected = expectedType.isAssignableFrom(thrownByTest.getClass());
      }
      finally {
         concludeTestMethodExecution(savePoint, testFailure, testFailureExpected);
      }
   }
}