/*
    * 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
    *
    *      http://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.io.input;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test for the SwappedDataInputStream. This also
   * effectively tests the underlying EndianUtils Stream methods.
   */
  
  public class SwappedDataInputStreamTest {
  
      private SwappedDataInputStream sdis;
      private byte[] bytes;
  
      @BeforeEach
      public void setUp() {
          bytes = new byte[] {
              0x01,
              0x02,
              0x03,
              0x04,
              0x05,
              0x06,
              0x07,
              0x08
          };
          final ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
          this.sdis = new SwappedDataInputStream( bais );
      }
  
      @AfterEach
      public void tearDown() {
          this.sdis = null;
      }
  
      @Test
      public void testReadBoolean() throws IOException {
          bytes = new byte[] { 0x00, 0x01, 0x02, };
          try (
              final ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
              final SwappedDataInputStream sdis = new SwappedDataInputStream(bais)
          ) {
              assertFalse(sdis.readBoolean());
              assertTrue(sdis.readBoolean());
              assertTrue(sdis.readBoolean());
          }
      }
  
      @Test
      public void testReadByte() throws IOException {
          assertEquals( 0x01, this.sdis.readByte() );
      }
  
      @Test
      public void testReadChar() throws IOException {
          assertEquals( (char) 0x0201, this.sdis.readChar() );
      }
  
      @Test
      public void testReadDouble() throws IOException {
          assertEquals( Double.longBitsToDouble(0x0807060504030201L), this.sdis.readDouble(), 0 );
      }
  
      @Test
      public void testReadFloat() throws IOException {
          assertEquals( Float.intBitsToFloat(0x04030201), this.sdis.readFloat(), 0 );
      }
  
      @Test
      public void testReadFully() throws IOException {
          final byte[] bytesIn = new byte[8];
          this.sdis.readFully(bytesIn);
          for (int i = 0; i < 8; i++) {
             assertEquals(bytes[i], bytesIn[i]);
         }
     }
 
     @Test
     public void testReadInt() throws IOException {
         assertEquals( 0x04030201, this.sdis.readInt() );
     }
 
     @Test
     public void testReadLine() {
         assertThrows(UnsupportedOperationException.class, () ->  this.sdis.readLine(),
                 "readLine should be unsupported. ");
     }
 
     @Test
     public void testReadLong() throws IOException {
         assertEquals( 0x0807060504030201L, this.sdis.readLong() );
     }
 
     @Test
     public void testReadShort() throws IOException {
         assertEquals( (short) 0x0201, this.sdis.readShort() );
     }
 
     @Test
     public void testReadUnsignedByte() throws IOException {
         assertEquals( 0x01, this.sdis.readUnsignedByte() );
     }
 
     @Test
     public void testReadUnsignedShort() throws IOException {
         assertEquals( (short) 0x0201, this.sdis.readUnsignedShort() );
     }
 
     @Test
     public void testReadUTF() {
         assertThrows(UnsupportedOperationException.class, () ->  this.sdis.readUTF(),
                 "readUTF should be unsupported. ");
     }
 
     @Test
     public void testSkipBytes() throws IOException {
         this.sdis.skipBytes(4);
         assertEquals( 0x08070605, this.sdis.readInt() );
     }
 
 }