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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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/*
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package mockit.external.asm;

/**
 * An edge in the control flow graph of a method body. See {@link Label}.
 *
 * @author Eric Bruneton
 */
final class Edge
{
   /**
    * Denotes a normal control flow graph edge.
    */
   static final int NORMAL = 0;

   /**
    * Denotes a control flow graph edge corresponding to an exception handler. More precisely any {@link Edge} whose
    * {@link #info} is strictly positive corresponds to an exception handler. The actual value of {@link #info} is the
    * index, in the {@link ClassWriter} type table, of the exception that is caught.
    */
   static final int EXCEPTION = 0x7FFFFFFF;

   /**
    * Information about this control flow graph edge. If {@code ClassWriter#computeFrames} is not used this field is the
    * (relative) stack size in the basic block from which this edge originates. This size is equal to the stack size at
    * the "jump" instruction to which this edge corresponds, relatively to the stack size at the beginning of the
    * originating basic block. If {@link ClassWriter#computeFrames} is used, this field is the kind of this control flow
    * graph edge (i.e. NORMAL or EXCEPTION).
    */
   final int info;

   /**
    * The successor block of the basic block from which this edge originates.
    */
   final Label successor;

   /**
    * The next edge in the list of successors of the originating basic block. See {@link Label#successors}.
    */
   Edge next;

   Edge(int info, Label successor) {
      this.info = info;
      this.successor = successor;
   }
}