/**
 * 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.heron.dlog;

import org.junit.Test;

import org.apache.distributedlog.AppendOnlyStreamWriter;
import org.apache.distributedlog.api.DistributedLogManager;

import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

public class DLOutputStreamTest {

  /**
   * Test Case: close output stream.
   */
  @Test
  public void testClose() throws Exception {
    DistributedLogManager dlm = mock(DistributedLogManager.class);
    AppendOnlyStreamWriter writer = mock(AppendOnlyStreamWriter.class);
    DLOutputStream out = new DLOutputStream(dlm, writer);

    out.close();
    verify(writer, times(1)).markEndOfStream();
    verify(writer, times(1)).close();
    verify(dlm, times(1)).close();
  }

  /**
   * Test Case: flush should force writing the data.
   */
  @Test
  public void testFlush() throws Exception {
    DistributedLogManager dlm = mock(DistributedLogManager.class);
    AppendOnlyStreamWriter writer = mock(AppendOnlyStreamWriter.class);
    DLOutputStream out = new DLOutputStream(dlm, writer);

    out.flush();
    verify(writer, times(1)).force(eq(false));
  }

  /**
   * Test Case: test writing the data.
   */
  @Test
  public void testWrite() throws Exception {
    DistributedLogManager dlm = mock(DistributedLogManager.class);
    AppendOnlyStreamWriter writer = mock(AppendOnlyStreamWriter.class);
    DLOutputStream out = new DLOutputStream(dlm, writer);

    byte[] data = new byte[16];
    out.write(data);
    verify(writer, times(1)).write(data);
  }

}