/*
    * 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.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.StringReader;
  import java.io.UncheckedIOException;
  import java.nio.CharBuffer;
  
  import org.apache.commons.io.IOUtils;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link UncheckedFilterReader}.
   */
  public class UncheckedBufferedReaderTest {
  
      private UncheckedBufferedReader ucStringReader;
      private UncheckedBufferedReader ucBrokenReader;
      private IOException exception = new IOException("test exception");
  
      @SuppressWarnings("resource")
      @BeforeEach
      public void beforeEach() {
          ucStringReader = UncheckedBufferedReader.builder().setReader(new StringReader("01")).get();
          exception = new IOException("test exception");
          ucBrokenReader = UncheckedBufferedReader.builder().setReader(new BrokenReader(exception)).get();
      }
  
      @Test
      public void testBufferSize() {
          try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(new StringReader("0123456789")).setBufferSize(2).get()) {
              assertEquals('0', uncheckedReader.read());
          }
      }
  
      @Test
      public void testClose() {
          ucStringReader.close();
          assertThrows(UncheckedIOException.class, () -> ucBrokenReader.read());
      }
  
      @Test
      public void testCloseThrows() {
          assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.close()).getCause());
      }
  
      @Test
      public void testMarkReset() {
          ucStringReader.mark(10);
          final int c = ucStringReader.read();
          ucStringReader.reset();
          assertEquals(c, ucStringReader.read());
      }
  
      @Test
      public void testMarkThrows() {
          try (UncheckedBufferedReader closedReader = UncheckedBufferedReader.builder().setReader(ClosedReader.INSTANCE).get()) {
              closedReader.close();
              assertThrows(UncheckedIOException.class, () -> closedReader.mark(1));
          }
      }
  
      @Test
      public void testRead() {
          final Reader reader = ucStringReader;
          try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(reader).get()) {
              assertEquals('0', uncheckedReader.read());
              assertEquals('1', uncheckedReader.read());
              assertEquals(IOUtils.EOF, uncheckedReader.read());
              assertEquals(IOUtils.EOF, uncheckedReader.read());
          }
      }
  
      @Test
      public void testReadCharArray() {
          final Reader reader = ucStringReader;
          try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(reader).get()) {
              final char[] array = new char[1];
             assertEquals(1, uncheckedReader.read(array));
             assertEquals('0', array[0]);
             array[0] = 0;
             assertEquals(1, uncheckedReader.read(array));
             assertEquals('1', array[0]);
             array[0] = 0;
             assertEquals(IOUtils.EOF, uncheckedReader.read(array));
             assertEquals(0, array[0]);
             assertEquals(IOUtils.EOF, uncheckedReader.read(array));
             assertEquals(0, array[0]);
         }
     }
 
     @Test
     public void testReadCharArrayIndexed() {
         final Reader reader = ucStringReader;
         try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(reader).get()) {
             final char[] array = new char[1];
             assertEquals(1, uncheckedReader.read(array, 0, 1));
             assertEquals('0', array[0]);
             array[0] = 0;
             assertEquals(1, uncheckedReader.read(array, 0, 1));
             assertEquals('1', array[0]);
             array[0] = 0;
             assertEquals(IOUtils.EOF, uncheckedReader.read(array, 0, 1));
             assertEquals(0, array[0]);
             assertEquals(IOUtils.EOF, uncheckedReader.read(array, 0, 1));
             assertEquals(0, array[0]);
         }
     }
 
     @Test
     public void testReadCharArrayIndexedThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.read(new char[1], 0, 1)).getCause());
     }
 
     @Test
     public void testReadCharArrayThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.read(new char[1])).getCause());
     }
 
     @Test
     public void testReadCharBuffer() {
         final Reader reader = ucStringReader;
         try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(reader).get()) {
             final CharBuffer buffer = CharBuffer.wrap(new char[1]);
             assertEquals(1, uncheckedReader.read(buffer));
             buffer.flip();
             assertEquals('0', buffer.charAt(0));
             buffer.put(0, (char) 0);
             assertEquals(1, uncheckedReader.read(buffer));
             buffer.flip();
             assertEquals('1', buffer.charAt(0));
             buffer.put(0, (char) 0);
             assertEquals(IOUtils.EOF, uncheckedReader.read(buffer));
             buffer.flip();
             assertEquals(0, buffer.length());
             assertEquals(0, uncheckedReader.read(buffer));
             buffer.flip();
             assertEquals(0, buffer.length());
         }
     }
 
     @Test
     public void testReadCharBufferThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.read(CharBuffer.wrap(new char[1]))).getCause());
     }
 
     @Test
     public void testReadLine() {
         final Reader reader = ucStringReader;
         try (UncheckedBufferedReader uncheckedReader = UncheckedBufferedReader.builder().setReader(reader).get()) {
             assertEquals("01", uncheckedReader.readLine());
             assertEquals(IOUtils.EOF, uncheckedReader.read());
             assertEquals(IOUtils.EOF, uncheckedReader.read());
         }
     }
 
     @Test
     public void testReadLineThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.readLine()).getCause());
     }
 
     @Test
     public void testReadThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.read()).getCause());
     }
 
     @Test
     public void testReady() {
         assertTrue(ucStringReader.ready());
     }
 
     @Test
     public void testReadyThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.ready()).getCause());
     }
 
     @Test
     public void testResetThrows() {
         try (UncheckedBufferedReader closedReader = UncheckedBufferedReader.builder().setReader(ClosedReader.INSTANCE).get()) {
             closedReader.close();
             assertThrows(UncheckedIOException.class, () -> ucBrokenReader.reset());
         }
     }
 
     @Test
     public void testSkip() {
         assertEquals(1, ucStringReader.skip(1));
     }
 
     @Test
     public void testSkipThrows() {
         assertEquals(exception, assertThrows(UncheckedIOException.class, () -> ucBrokenReader.skip(1)).getCause());
     }
 
 }