content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.underfs.oss;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertEquals;
  import static org.mockito.ArgumentMatchers.argThat;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.spy;
  import static org.mockito.Mockito.when;
  
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.retry.CountingRetry;
  
  import com.aliyun.oss.OSS;
  import com.aliyun.oss.model.OSSObject;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Arrays;
  
  /**
   * Unit tests for the {@link OSSInputStream}.
   */
  public class OSSInputStreamTest {
  
    private static final String BUCKET_NAME = "testBucket";
    private static final String OBJECT_KEY = "testObjectKey";
    private static AlluxioConfiguration sConf = Configuration.global();
  
    private OSSInputStream mOssInputStream;
    private OSS mOssClient;
    private InputStream[] mInputStreamSpy;
    private OSSObject[] mOssObject;
  
    /**
     * The exception expected to be thrown.
     */
    @Rule
    public final ExpectedException mExceptionRule = ExpectedException.none();
  
    @Before
    public void setUp() throws IOException {
      mOssClient = mock(OSS.class);
  
      byte[] input = new byte[] {1, 2, 3};
      mOssObject = new OSSObject[input.length];
      mInputStreamSpy = new InputStream[input.length];
      for (int i = 0; i < input.length; ++i) {
        final long pos = (long) i;
        mOssObject[i] = mock(OSSObject.class);
        when(mOssClient.getObject(argThat(argument -> {
          if (argument != null) {
            return argument.getRange()[0] == pos;
          }
          return false;
        })))
            .thenReturn(mOssObject[i]);
        byte[] mockInput = Arrays.copyOfRange(input, i, input.length);
        mInputStreamSpy[i] = spy(new ByteArrayInputStream(mockInput));
        when(mOssObject[i].getObjectContent()).thenReturn(mInputStreamSpy[i]);
      }
      mOssInputStream = new OSSInputStream(BUCKET_NAME, OBJECT_KEY, mOssClient, new CountingRetry(1),
          sConf.getBytes(PropertyKey.UNDERFS_OBJECT_STORE_MULTI_RANGE_CHUNK_SIZE));
    }
  
    @Test
    public void close() throws IOException {
      mOssInputStream.close();
  
      mExceptionRule.expect(IOException.class);
      mExceptionRule.expectMessage(is("Stream closed"));
      mOssInputStream.read();
    }
  
    @Test
    public void readInt() throws IOException {
      assertEquals(1, mOssInputStream.read());
      assertEquals(2, mOssInputStream.read());
      assertEquals(3, mOssInputStream.read());
    }
  
    @Test
    public void readByteArray() throws IOException {
      byte[] bytes = new byte[3];
      int readCount = mOssInputStream.read(bytes, 0, 3);
      assertEquals(3, readCount);
      assertArrayEquals(new byte[] {1, 2, 3}, bytes);
    }
  
    @Test
    public void skip() throws IOException {
      assertEquals(1, mOssInputStream.read());
      mOssInputStream.skip(1);
      assertEquals(3, mOssInputStream.read());
    }
  }
  