/*
    * 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.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link AutoCloseInputStream}.
   */
  public class AutoCloseInputStreamTest {
  
      private byte[] data;
  
      private AutoCloseInputStream stream;
  
      private boolean closed;
  
      @BeforeEach
      public void setUp() {
          data = new byte[] { 'x', 'y', 'z' };
          stream = new AutoCloseInputStream(new ByteArrayInputStream(data) {
              @Override
              public void close() {
                  closed = true;
              }
          });
          closed = false;
      }
  
      @Test
      public void testBuilderGet() {
          // java.lang.IllegalStateException: origin == null
          assertThrows(IllegalStateException.class, () -> AutoCloseInputStream.builder().get());
      }
  
      @Test
      public void testClose() throws IOException {
          stream.close();
          assertTrue(closed, "closed");
          assertEquals(-1, stream.read(), "read()");
      }
  
      @Test
      public void testFinalize() throws Throwable {
          stream.finalize();
          assertTrue(closed, "closed");
          assertEquals(-1, stream.read(), "read()");
      }
  
      @Test
      public void testRead() throws IOException {
          for (final byte element : data) {
              assertEquals(element, stream.read(), "read()");
              assertFalse(closed, "closed");
          }
          assertEquals(-1, stream.read(), "read()");
          assertTrue(closed, "closed");
      }
  
      @Test
      public void testReadBuffer() throws IOException {
          final byte[] b = new byte[data.length * 2];
          int total = 0;
          for (int n = 0; n != -1; n = stream.read(b)) {
              assertFalse(closed, "closed");
              for (int i = 0; i < n; i++) {
                  assertEquals(data[total + i], b[i], "read(b)");
              }
              total += n;
          }
          assertEquals(data.length, total, "read(b)");
          assertTrue(closed, "closed");
          assertEquals(-1, stream.read(b), "read(b)");
      }
  
      @Test
     public void testReadBufferOffsetLength() throws IOException {
         final byte[] b = new byte[data.length * 2];
         int total = 0;
         for (int n = 0; n != -1; n = stream.read(b, total, b.length - total)) {
             assertFalse(closed, "closed");
             total += n;
         }
         assertEquals(data.length, total, "read(b, off, len)");
         for (int i = 0; i < data.length; i++) {
             assertEquals(data[i], b[i], "read(b, off, len)");
         }
         assertTrue(closed, "closed");
         assertEquals(-1, stream.read(b, 0, b.length), "read(b, off, len)");
     }
 
     private void testResetBeforeEnd(final AutoCloseInputStream inputStream) throws IOException {
         inputStream.mark(1);
         assertEquals('1', inputStream.read());
         inputStream.reset();
         assertEquals('1', inputStream.read());
         assertEquals('2', inputStream.read());
         inputStream.reset();
         assertEquals('1', inputStream.read());
         assertEquals('2', inputStream.read());
         assertEquals('3', inputStream.read());
         inputStream.reset();
         assertEquals('1', inputStream.read());
         assertEquals('2', inputStream.read());
         assertEquals('3', inputStream.read());
         assertEquals('4', inputStream.read());
         inputStream.reset();
         assertEquals('1', inputStream.read());
     }
 
     @Test
     public void testResetBeforeEndCtor() throws IOException {
         try (final AutoCloseInputStream inputStream = new AutoCloseInputStream(new ByteArrayInputStream("1234".getBytes()))) {
             testResetBeforeEnd(inputStream);
         }
     }
 
     @Test
     public void testResetBeforeEndSetByteArray() throws IOException {
         try (final AutoCloseInputStream inputStream = AutoCloseInputStream.builder().setByteArray("1234".getBytes()).get()) {
             testResetBeforeEnd(inputStream);
         }
     }
 
     @Test
     public void testResetBeforeEndSetCharSequence() throws IOException {
         try (final AutoCloseInputStream inputStream = AutoCloseInputStream.builder().setCharSequence("1234").get()) {
             testResetBeforeEnd(inputStream);
         }
     }
 
     @Test
     public void testResetBeforeEndSetInputStream() throws IOException {
         try (final AutoCloseInputStream inputStream = AutoCloseInputStream.builder().setInputStream(new ByteArrayInputStream("1234".getBytes())).get()) {
             testResetBeforeEnd(inputStream);
         }
     }
 
 }