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.client.fs.io;
  
  import alluxio.AlluxioURI;
  import alluxio.client.block.stream.BlockInStream;
  import alluxio.client.file.FileInStream;
  import alluxio.client.file.FileSystem;
  import alluxio.client.file.FileSystemTestUtils;
  import alluxio.exception.AlluxioException;
  import alluxio.grpc.CreateFilePOptions;
  import alluxio.grpc.WritePType;
  import alluxio.testutils.BaseIntegrationTest;
  import alluxio.testutils.LocalAlluxioClusterResource;
  import alluxio.util.io.BufferUtils;
  import alluxio.util.io.PathUtils;
  
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.ClassRule;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Integration tests for {@link BlockInStream}.
   */
  public final class BufferedBlockInStreamIntegrationTest extends BaseIntegrationTest {
    private static final int MIN_LEN = 0;
    private static final int MAX_LEN = 255;
    private static final int DELTA = 33;
  
    @ClassRule
    public static LocalAlluxioClusterResource sLocalAlluxioClusterResource =
        new LocalAlluxioClusterResource.Builder().build();
    private static FileSystem sFileSystem;
    private static String sTestPath = PathUtils.uniqPath();
  
    @BeforeClass
    public static void beforeClass() throws Exception {
      sFileSystem = sLocalAlluxioClusterResource.get().getClient();
  
      // Create files of varying size and write type to later read from
      for (int k = MIN_LEN; k <= MAX_LEN; k += DELTA) {
        for (CreateFilePOptions op : getOptionSet()) {
          AlluxioURI path = new AlluxioURI(sTestPath + "/file_" + k + "_" + op.hashCode());
          FileSystemTestUtils.createByteFile(sFileSystem, path, op, k);
        }
      }
    }
  
    private static List<CreateFilePOptions> getOptionSet() {
      List<CreateFilePOptions> ret = new ArrayList<>(3);
      CreateFilePOptions optionsDefault = CreateFilePOptions.getDefaultInstance();
      ret.add(optionsDefault.toBuilder().setWriteType(WritePType.CACHE_THROUGH)
          .setRecursive(true).build());
      ret.add(optionsDefault.toBuilder().setWriteType(WritePType.MUST_CACHE).setRecursive(true)
          .build());
      ret.add(optionsDefault.toBuilder().setWriteType(WritePType.THROUGH).setRecursive(true)
          .build());
      return ret;
    }
  
    /**
     * Tests {@link alluxio.client.block.BufferedBlockInStream#read()}.
     */
    @Test
    public void readTest1() throws IOException, AlluxioException {
      for (int k = MIN_LEN; k <= MAX_LEN; k += DELTA) {
        for (CreateFilePOptions op : getOptionSet()) {
          AlluxioURI path = new AlluxioURI(sTestPath + "/file_" + k + "_" + op.hashCode());
          for (int i = 0; i < 2; i++) {
            FileInStream is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
            byte[] ret = new byte[k];
            int value = is.read();
            int cnt = 0;
            while (value != -1) {
              Assert.assertTrue(value >= 0);
              Assert.assertTrue(value < 256);
              ret[cnt++] = (byte) value;
              value = is.read();
            }
            Assert.assertEquals(cnt, k);
            Assert.assertTrue(BufferUtils.equalIncreasingByteArray(k, ret));
            is.close();
          }
        }
      }
    }
  
    /**
     * Tests {@link alluxio.client.block.BufferedBlockInStream#read(byte[])}.
     */
    @Test
    public void readTest2() throws IOException, AlluxioException {
      for (int k = MIN_LEN; k <= MAX_LEN; k += DELTA) {
        for (CreateFilePOptions op : getOptionSet()) {
          AlluxioURI path = new AlluxioURI(sTestPath + "/file_" + k + "_" + op.hashCode());
  
          FileInStream is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
          byte[] ret = new byte[k];
          Assert.assertEquals(k, is.read(ret));
          Assert.assertTrue(BufferUtils.equalIncreasingByteArray(k, ret));
          is.close();
  
          is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
          ret = new byte[k];
          Assert.assertEquals(k, is.read(ret));
          Assert.assertTrue(BufferUtils.equalIncreasingByteArray(k, ret));
          is.close();
        }
      }
    }
  
    /**
     * Tests {@link alluxio.client.block.BufferedBlockInStream#read(byte[], int, int)}.
     */
    @Test
    public void readTest3() throws IOException, AlluxioException {
      for (int k = MIN_LEN; k <= MAX_LEN; k += DELTA) {
        for (CreateFilePOptions op : getOptionSet()) {
          AlluxioURI path = new AlluxioURI(sTestPath + "/file_" + k + "_" + op.hashCode());
  
          FileInStream is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
  
          byte[] ret = new byte[k / 2];
          Assert.assertEquals(k / 2, is.read(ret, 0, k / 2));
          Assert.assertTrue(BufferUtils.equalIncreasingByteArray(k / 2, ret));
          is.close();
  
          is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
          ret = new byte[k];
          Assert.assertEquals(k, is.read(ret, 0, k));
          Assert.assertTrue(BufferUtils.equalIncreasingByteArray(k, ret));
          is.close();
        }
      }
    }
  
    /**
     * Tests {@link alluxio.client.block.BufferedBlockInStream#skip(long)}.
     */
    @Test
    public void skip() throws IOException, AlluxioException {
      for (int k = MIN_LEN + DELTA; k <= MAX_LEN; k += DELTA) {
        for (CreateFilePOptions op : getOptionSet()) {
          AlluxioURI path = new AlluxioURI(sTestPath + "/file_" + k + "_" + op.hashCode());
  
          FileInStream is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
  
          Assert.assertEquals(k / 2, is.skip(k / 2));
          Assert.assertEquals(k / 2, is.read());
          is.close();
  
          is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
          int t = k / 3;
          Assert.assertEquals(t, is.skip(t));
          Assert.assertEquals(t, is.read());
          Assert.assertEquals(t, is.skip(t));
          Assert.assertEquals(2 * t + 1, is.read());
          is.close();
        }
      }
    }
  }
  