/*
    * 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.io.output;
  
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.IOException;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link NullOutputStream}.
   */
  class NullOutputStreamTest {
  
      private void process(final NullOutputStream nos) throws IOException {
          nos.write("string".getBytes());
          nos.write("some string".getBytes(), 3, 5);
          nos.write(1);
          nos.write(0x0f);
          nos.flush();
          nos.close();
          nos.write("allowed".getBytes());
          nos.write(255);
          // Test arguments validation
          final byte[] b = new byte[1];
          assertThrows(IndexOutOfBoundsException.class, () -> nos.write(b, -1, 0));
          assertThrows(IndexOutOfBoundsException.class, () -> nos.write(b, 0, -1));
          assertThrows(IndexOutOfBoundsException.class, () -> nos.write(b, 0, 2));
          assertThrows(NullPointerException.class, () -> nos.write(null, 0, 0));
      }
  
      @Test
      @SuppressWarnings("deprecation")
      void testNewInstance() throws IOException {
          try (NullOutputStream nos = new NullOutputStream()) {
              process(nos);
          }
      }
  
      @Test
      void testSingleton() throws IOException {
          try (NullOutputStream nos = NullOutputStream.INSTANCE) {
              process(nos);
          }
      }
  
  }