/*
    * 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.commons.net.telnet;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * JUnit test class for TerminalTypeOptionHandler
   */
  class WindowSizeOptionHandlerTest extends AbstractTelnetOptionHandlerTest {
  
      /**
       * compares two arrays of int
       */
      private void equalInts(final int a1[], final int a2[]) {
          assertEquals(a1.length, a2.length, "Arrays should be the same length");
          for (int ii = 0; ii < a1.length; ii++) {
              assertEquals(a1[ii], a2[ii], "Array entry " + ii + " should match");
          }
      }
  
      /**
       * setUp for the test.
       */
      @BeforeEach
      protected void setUp() {
          opthand1 = new WindowSizeOptionHandler(80, 24);
          opthand2 = new WindowSizeOptionHandler(255, 255, true, true, true, true);
          opthand3 = new WindowSizeOptionHandler(0xFFFF, 0x00FF, false, false, false, false);
      }
  
      /**
       * test of client-driven subnegotiation. Checks that nothing is sent
       */
      @Test
      void testAnswerSubnegotiation() {
          final int[] subn = { TelnetOption.WINDOW_SIZE, 24, 80 };
  
          final int[] resp1 = opthand1.answerSubnegotiation(subn, subn.length);
          final int[] resp2 = opthand2.answerSubnegotiation(subn, subn.length);
          final int[] resp3 = opthand3.answerSubnegotiation(subn, subn.length);
  
          assertNull(resp1);
          assertNull(resp2);
          assertNull(resp3);
      }
  
      /**
       * test of the constructors.
       */
      @Override
      @Test
      void testConstructors() {
          assertEquals(TelnetOption.WINDOW_SIZE, opthand1.getOptionCode());
          super.testConstructors();
      }
  
      /**
       * test of client-driven subnegotiation. Checks that no subnegotiation is made.
       */
      @Test
      void testStartSubnegotiation() {
          assertNull(opthand1.startSubnegotiationRemote());
          assertNull(opthand2.startSubnegotiationRemote());
          assertNull(opthand3.startSubnegotiationRemote());
      }
  
      /**
       * test of client-driven subnegotiation.
       */
      @Test
      void testStartSubnegotiationLocal() {
          final int[] exp1 = { 31, 0, 80, 0, 24 };
          final int[] start1 = opthand1.startSubnegotiationLocal();
          assertEquals(5, start1.length);
          equalInts(exp1, start1);
  
          final int[] exp2 = { 31, 0, 255, 255, 0, 255, 255 };
          final int[] start2 = opthand2.startSubnegotiationLocal();
          equalInts(exp2, start2);
  
         final int[] exp3 = { 31, 255, 255, 255, 255, 0, 255, 255 };
         final int[] start3 = opthand3.startSubnegotiationLocal();
         equalInts(exp3, start3);
     }
 }