/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.bcel.generic;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import org.junit.jupiter.api.Test;
  
  class InstructionHandleTest {
  
      // Test that setInstruction only allows Instructions that are not BranchInstructions
  
      @Test
      void testBCEL195() {
          final InstructionList il = new InstructionList();
          final InstructionHandle ih = il.append(InstructionConst.NOP);
          new TABLESWITCH(new int[0], InstructionHandle.EMPTY_ARRAY, ih);
          new TABLESWITCH(new int[0], InstructionHandle.EMPTY_ARRAY, ih);
      }
  
      @Test
      void testGetIHnull() {
          assertThrows(ClassGenException.class, () -> InstructionHandle.getInstructionHandle(null));
      }
  
      @Test
      void testsetInstructionI() {
          final InstructionHandle ih = InstructionHandle.getInstructionHandle(new NOP()); // have to start with a valid non BI
          assertNotNull(ih);
          ih.setInstruction(new NOP());
          assertNotNull(ih);
      }
  
      @Test
      void testsetInstructionnotI() {
          final InstructionHandle ih = InstructionHandle.getInstructionHandle(new NOP()); // have to start with a valid non BI
          assertNotNull(ih);
          assertThrows(ClassGenException.class, () -> ih.setInstruction(new GOTO(null)));
      }
  
      @Test
      void testsetInstructionNull() {
          final InstructionHandle ih = InstructionHandle.getInstructionHandle(new NOP()); // have to start with a valid non BI
          assertNotNull(ih);
          assertThrows(ClassGenException.class, () -> ih.setInstruction(null));
      }
  }