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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.state;

import mockit.internal.mockups.*;
import mockit.internal.expectations.*;
import mockit.internal.expectations.mocking.*;

/**
 * A singleton which stores several data structures which in turn hold global state for individual test methods, test
 * classes, and for the test run as a whole.
 */
public final class TestRun
{
   private static final TestRun INSTANCE = new TestRun();
   private TestRun() {}

   // Fields with global state ////////////////////////////////////////////////////////////////////////////////////////

   private static final ThreadLocal noMockingCount = new ThreadLocal()
   {
      @Override
      protected Integer initialValue() { return 0; }

      @Override
      public void set(Integer valueToAdd)
      {
         super.set(get() + valueToAdd);
      }
   };

   // Used only by the Coverage tool:
   private int testId;

   private Class currentTestClass;
   private Object currentTestInstance;
   private SavePoint savePointForTestMethod;
   private SavePoint savePointForTestClass;
   private SharedFieldTypeRedefinitions sharedFieldTypeRedefinitions;

   private final MockFixture mockFixture = new MockFixture();

   private final ExecutingTest executingTest = new ExecutingTest();
   private final MockClasses mockClasses = new MockClasses();

   // Static "getters" for global state ///////////////////////////////////////////////////////////////////////////////

   public static boolean isInsideNoMockingZone() { return noMockingCount.get() > 0; }

   public static Class getCurrentTestClass() { return INSTANCE.currentTestClass; }

   public static Object getCurrentTestInstance() { return INSTANCE.currentTestInstance; }

   @SuppressWarnings("UnusedDeclaration")
   public static int getTestId() { return INSTANCE.testId; }

   public static SavePoint getSavePointForTestClass() { return INSTANCE.savePointForTestClass; }

   public static SharedFieldTypeRedefinitions getSharedFieldTypeRedefinitions()
   {
      return INSTANCE.sharedFieldTypeRedefinitions;
   }

   public static MockFixture mockFixture() { return INSTANCE.mockFixture; }

   public static ExecutingTest getExecutingTest() { return INSTANCE.executingTest; }

   public static RecordAndReplayExecution getRecordAndReplayForRunningTest()
   {
      return INSTANCE.currentTestInstance == null ? null : INSTANCE.executingTest.getCurrentRecordAndReplay();
   }

   public static RecordAndReplayExecution getRecordAndReplayForRunningTest(boolean create)
   {
      if (INSTANCE.currentTestInstance == null) {
         return null;
      }

      return INSTANCE.executingTest.getRecordAndReplay(INSTANCE.savePointForTestMethod != null && create);
   }

   public static MockClasses getMockClasses() { return INSTANCE.mockClasses; }

   public static void verifyExpectationsOnAnnotatedMocks()
   {
      getMockClasses().getMockStates().verifyExpectations();
   }

   // Static "mutators" for global state //////////////////////////////////////////////////////////////////////////////

   public static void resetExpectationsOnAnnotatedMocks()
   {
      getMockClasses().getMockStates().resetExpectations();
   }

   public static void setCurrentTestClass(Class testClass)
   {
      INSTANCE.currentTestClass = testClass;
   }

   public static void prepareForNextTest()
   {
      INSTANCE.testId++;
      INSTANCE.executingTest.setRecordAndReplay(null);
   }

   public static void setSavePointForTestMethod(SavePoint savePointForTestMethod)
   {
      INSTANCE.savePointForTestMethod = savePointForTestMethod;

      if (savePointForTestMethod != null) {
         INSTANCE.executingTest.clearRecordAndReplayForVerifications();
      }
   }

   public static void enterNoMockingZone() { noMockingCount.set(1); }
   public static void exitNoMockingZone() { noMockingCount.set(-1); }

   public static void setRunningIndividualTest(Object testInstance)
   {
      INSTANCE.currentTestInstance = testInstance;
   }

   public static void setSavePointForTestClass(SavePoint savePoint)
   {
      INSTANCE.savePointForTestClass = savePoint;
   }

   public static void setSharedFieldTypeRedefinitions(SharedFieldTypeRedefinitions redefinitions)
   {
      INSTANCE.sharedFieldTypeRedefinitions = redefinitions;
   }

   public static void finishCurrentTestExecution(boolean clearSharedMocks)
   {
      INSTANCE.savePointForTestMethod = null;
      INSTANCE.executingTest.finishExecution(clearSharedMocks);
   }

   // Methods to be called only from generated bytecode or from the MockingBridge /////////////////////////////////////

   public static Object getMock(int index)
   {
      return getMockClasses().regularMocks.getMock(index);
   }

   @SuppressWarnings("UnusedDeclaration")
   public static Object getStartupMock(int index)
   {
      return getMockClasses().startupMocks.getMock(index);
   }

   public static boolean updateMockState(String mockClassDesc, int mockStateIndex)
   {
      MockStates mockStates = getMockStates();
      return mockStates.updateMockState(mockClassDesc, mockStateIndex);
   }

   private static MockStates getMockStates()
   {
      return getMockClasses().getMockStates();
   }

   public static void exitReentrantMock(String mockClassDesc, int mockStateIndex)
   {
      MockStates mockStates = getMockStates();
      mockStates.exitReentrantMock(mockClassDesc, mockStateIndex);
   }

   public static MockInvocation createMockInvocation(
      String mockClassDesc, int mockStateIndex, Object mockedInstance, Object[] mockArgs)
   {
      MockStates mockStates = getMockStates();
      return mockStates.createMockInvocation(mockClassDesc, mockStateIndex, mockedInstance, mockArgs);
   }
}