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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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package mockit.external.asm;

import javax.annotation.*;

import static mockit.external.asm.Item.Type.*;

final class MethodHandleItem extends Item
{
   private MethodHandle methodHandle;

   MethodHandleItem(@Nonnegative int index) {
      super(index);
      type = HANDLE_BASE;
   }

   MethodHandleItem(@Nonnegative int index, @Nonnull MethodHandleItem item) {
      super(index, item);
      methodHandle = item.methodHandle;
   }

   /**
    * Sets the type and hash code of this method handle item.
    */
   void set(@Nonnull MethodHandle methodHandle) {
      this.methodHandle = methodHandle;
      type = HANDLE_BASE;
      setHashCode(methodHandle.hashCode());
      type = HANDLE_BASE + methodHandle.tag;
   }

   @Override
   boolean isEqualTo(@Nonnull Item item) {
      return ((MethodHandleItem) item).methodHandle.equals(methodHandle);
   }
}