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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.expectations.invocation;

public final class InvocationConstraints
{
   public int minInvocations;
   int maxInvocations;
   public int invocationCount;

   public InvocationConstraints(boolean nonStrictInvocation)
   {
      setLimits(nonStrictInvocation ? 0 : 1, nonStrictInvocation ? -1 : 1);
   }

   public void setLimits(int minInvocations, int maxInvocations)
   {
      this.minInvocations = minInvocations;
      this.maxInvocations = maxInvocations;
   }

   void adjustMaxInvocations(int expectedInvocationCount)
   {
      if (maxInvocations > 0 && maxInvocations < expectedInvocationCount) {
         maxInvocations = expectedInvocationCount;
      }
   }

   void setUnlimitedMaxInvocations()
   {
      maxInvocations = -1;
   }

   public boolean incrementInvocationCount()
   {
      invocationCount++;
      return invocationCount == maxInvocations;
   }

   public boolean isInvocationCountLessThanMinimumExpected()
   {
      return invocationCount < minInvocations;
   }

   public boolean isInvocationCountMoreThanMaximumExpected()
   {
      return maxInvocations >= 0 && invocationCount > maxInvocations;
   }

   public boolean isInvocationCountInExpectedRange()
   {
      return minInvocations <= invocationCount && (invocationCount <= maxInvocations || maxInvocations < 0);
   }

   public Error verifyLowerLimit(ExpectedInvocation invocation, int minInvocations)
   {
      if (invocationCount < minInvocations) {
         int missingInvocations = minInvocations - invocationCount;
         return invocation.errorForMissingInvocations(missingInvocations);
      }

      return null;
   }

   public Error verifyUpperLimit(ExpectedInvocation invocation, Object[] replayArgs, int maxInvocations)
   {
      if (maxInvocations >= 0) {
         int unexpectedInvocations = invocationCount - maxInvocations;

         if (unexpectedInvocations > 0) {
            return invocation.errorForUnexpectedInvocations(replayArgs, unexpectedInvocations);
         }
      }

      return null;
   }

   public Error errorForMissingExpectations(ExpectedInvocation invocation)
   {
      return invocation.errorForMissingInvocations(minInvocations - invocationCount) ;
   }
}