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JMockit is a Java toolkit for automated developer testing. It contains APIs for the creation of the objects to be tested, for mocking dependencies, and for faking external APIs; JUnit (4 & 5) and TestNG test runners are supported. It also contains an advanced code coverage tool.

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

import java.lang.reflect.*;
import java.util.*;
import javax.annotation.*;

final class SequenceOfReturnValues
{
   @Nonnull private final Expectation expectation;
   @Nonnull private final Class returnType;
   @Nullable private final Object firstValue;
   @Nonnull private final Object[] remainingValues;

   SequenceOfReturnValues(
      @Nonnull Expectation expectation, @Nullable Object firstValue, @Nonnull Object[] remainingValues)
   {
      this.expectation = expectation;
      returnType = expectation.getReturnType();
      this.firstValue = firstValue;
      this.remainingValues = remainingValues;
   }

   boolean addResultWithSequenceOfValues()
   {
      boolean added = false;

      if (returnType != void.class) {
         if (returnType.isArray()) {
            added = addValuesInArrayIfApplicable();
         }
         else if (Iterator.class.isAssignableFrom(returnType)) {
            added = addValuesInIteratorIfApplicable();
         }
         else if (Iterable.class.isAssignableFrom(returnType)) {
            added = addValuesInIterableIfApplicable();
         }
      }

      return added;
   }

   private boolean addValuesInArrayIfApplicable()
   {
      if (firstValue == null || !firstValue.getClass().isArray()) {
         addArrayAsReturnValue();
         return true;
      }

      return false;
   }

   private void addArrayAsReturnValue()
   {
      Class elementType = returnType.getComponentType();
      int n = 1 + remainingValues.length;
      Object values = Array.newInstance(elementType, n);
      setArrayElement(elementType, values, 0, firstValue);

      for (int i = 1; i < n; i++) {
         setArrayElement(elementType, values, i, remainingValues[i - 1]);
      }

      expectation.getResults().addReturnValue(values);
   }

   private static void setArrayElement(Class elementType, Object array, int index, @Nullable Object value)
   {
      Object arrayValue = value;

      if (value != null) {
         if (elementType == byte.class || elementType == Byte.class) {
            arrayValue = ((Number) value).byteValue();
         }
         else if (elementType == short.class || elementType == Short.class) {
            arrayValue = ((Number) value).shortValue();
         }
      }

      Array.set(array, index, arrayValue);
   }

   private boolean addValuesInIteratorIfApplicable()
   {
      if (firstValue == null || !Iterator.class.isAssignableFrom(firstValue.getClass())) {
         List