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;
  
  import static org.junit.Assert.assertNull;
  
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.Configuration;
  
  import org.junit.Assume;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link UnderFileSystem}.
   */
  public final class UnderFileSystemTest {
  
    private final AlluxioConfiguration mConfiguration = Configuration.global();
  
    /**
     * Tests the
     * {@link UnderFileSystemFactoryRegistry#find(String, alluxio.conf.AlluxioConfiguration)} method
     * when using a core factory.
     */
    @Test
    public void coreFactory() {
      // Supported in core
      UnderFileSystemFactory factory = UnderFileSystemFactoryRegistry.find("/test/path",
          mConfiguration);
      assertNull("An UnderFileSystemFactory should not exist for local file paths", factory);
  
      factory = UnderFileSystemFactoryRegistry.find("file:///test/path", mConfiguration);
      assertNull("An UnderFileSystemFactory should not exist for local file paths", factory);
    }
  
    /**
     * Tests the
     * {@link UnderFileSystemFactoryRegistry#find(String, alluxio.conf.AlluxioConfiguration)}
     * method when using an external factory.
     */
    @Test
    public void externalFactory() {
      // As we are going to use some Maven trickery to re-use the test cases as is in the external
      // modules this test needs to assume that only the core implementations are present as otherwise
      // when we try and run it in the external modules it will fail
      // In core there is only one under file system implementation, if there are any more we aren't
      // running in core
      Assume.assumeTrue(UnderFileSystemFactoryRegistry.available().size() == 1);
  
      // Requires additional modules
      UnderFileSystemFactory factory =
          UnderFileSystemFactoryRegistry.find("hdfs://localhost/test/path", mConfiguration);
      assertNull(
          "No UnderFileSystemFactory should exist for HDFS paths as it requires a separate module",
          factory);
  
      factory = UnderFileSystemFactoryRegistry.find("oss://localhost/test/path", mConfiguration);
      assertNull(
          "No UnderFileSystemFactory should exist for OSS paths as it requires a separate module",
          factory);
  
      factory = UnderFileSystemFactoryRegistry.find("s3://localhost/test/path", mConfiguration);
      assertNull(
          "No UnderFileSystemFactory should exist for S3 paths as it requires a separate module",
          factory);
  
      factory = UnderFileSystemFactoryRegistry.find("s3a://localhost/test/path", mConfiguration);
      assertNull(
          "No UnderFileSystemFactory should exist for S3 paths as it requires a separate module",
          factory);
  
      factory = UnderFileSystemFactoryRegistry.find("glusterfs://localhost/test/path",
          mConfiguration);
      assertNull("No UnderFileSystemFactory should exist for Gluster FS paths as it requires"
          + " a separate module", factory);
    }
  }
  