hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractLeaseRecoveryTest.java

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 * 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
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 * See the License for the specific language governing permissions and
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package org.apache.hadoop.fs.contract;

import java.io.FileNotFoundException;
import java.io.IOException;

import org.assertj.core.api.Assertions;
import org.junit.Test;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LeaseRecoverable;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.test.LambdaTestUtils;

import static org.apache.hadoop.fs.CommonPathCapabilities.LEASE_RECOVERABLE;

public abstract class AbstractContractLeaseRecoveryTest extends
    AbstractFSContractTestBase {

  @Test
  public void testLeaseRecovery() throws Throwable {
    final Path path = methodPath();
    final FileSystem fs = getFileSystem();
    ContractTestUtils.touch(fs, path);
    LeaseRecoverable leaseRecoverableFs = verifyAndGetLeaseRecoverableInstance(fs, path);

    Assertions.assertThat(leaseRecoverableFs.recoverLease(path))
        .describedAs("Issuing lease recovery on a closed file must be successful")
        .isTrue();

    Assertions.assertThat(leaseRecoverableFs.isFileClosed(path))
        .describedAs("Get the isFileClose status on a closed file must be successful")
        .isTrue();
  }

  @Test
  public void testLeaseRecoveryFileNotExist() throws Throwable {
    final Path path = new Path("notExist");
    final FileSystem fs = getFileSystem();
    LeaseRecoverable leaseRecoverableFs = verifyAndGetLeaseRecoverableInstance(fs, path);

    LambdaTestUtils.intercept(FileNotFoundException.class, "File does not exist",
        () -> leaseRecoverableFs.recoverLease(path));

    LambdaTestUtils.intercept(FileNotFoundException.class, "File does not exist",
        () -> leaseRecoverableFs.isFileClosed(path));
  }

  @Test
  public void testLeaseRecoveryFileOnDirectory() throws Throwable {
    final Path path = methodPath();
    final FileSystem fs = getFileSystem();
    LeaseRecoverable leaseRecoverableFs = verifyAndGetLeaseRecoverableInstance(fs, path);
    final Path parentDirectory = path.getParent();

    LambdaTestUtils.intercept(FileNotFoundException.class, "Path is not a file",
        () -> leaseRecoverableFs.recoverLease(parentDirectory));

    LambdaTestUtils.intercept(FileNotFoundException.class, "Path is not a file",
        () -> leaseRecoverableFs.isFileClosed(parentDirectory));
  }

  private LeaseRecoverable verifyAndGetLeaseRecoverableInstance(FileSystem fs, Path path)
      throws IOException {
    Assertions.assertThat(fs.hasPathCapability(path, LEASE_RECOVERABLE))
        .describedAs("path capability %s of %s", LEASE_RECOVERABLE, path)
        .isTrue();
    Assertions.assertThat(fs)
        .describedAs("filesystem %s", fs)
        .isInstanceOf(LeaseRecoverable.class);
    return (LeaseRecoverable) fs;
  }
}