samza-yarn/src/test/java/org/apache/samza/job/yarn/TestFileSystemImplConfig.java

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 * 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,
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package org.apache.samza.job.yarn;

import com.google.common.collect.ImmutableMap;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.apache.samza.config.Config;
import org.apache.samza.config.MapConfig;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import static org.junit.Assert.assertEquals;

public class TestFileSystemImplConfig {
  @Rule
  public ExpectedException thrown = ExpectedException.none();

  @Test
  public void testFileSystemImplConfigSuccess() {
    Map<String, String> configMap = new HashMap<>();

    configMap.put("fs.http.impl", "org.apache.samza.HttpFileSystem");
    configMap.put("fs.myscheme.impl", "org.apache.samza.MySchemeFileSystem");

    Config conf = new MapConfig(configMap);

    FileSystemImplConfig manager = new FileSystemImplConfig(conf);
    assertEquals(2, manager.getSchemes().size());
    assertEquals("http", manager.getSchemes().get(0));
    assertEquals("myscheme", manager.getSchemes().get(1));
  }

  @Test
  public void testNullConfig() {
    thrown.expect(IllegalArgumentException.class);
    thrown.expectMessage("config cannot be null");
    FileSystemImplConfig manager = new FileSystemImplConfig(null);
  }

  @Test
  public void testSchemeWithSubkeys() {
    Map<String, String> configMap = new HashMap<>();
    configMap.put("fs.http.impl", "org.apache.samza.HttpFileSystem");
    configMap.put("fs.myscheme.impl", "org.apache.samza.MySchemeFileSystem");
    configMap.put("fs.http.impl.key1", "val1");
    configMap.put("fs.http.impl.key2", "val2");
    Config conf = new MapConfig(configMap);

    FileSystemImplConfig manager = new FileSystemImplConfig(conf);

    Map<String, String> expectedFsHttpImplConfs = ImmutableMap.of(//Scheme with additional subkeys
        "fs.http.impl", "org.apache.samza.HttpFileSystem",
        "fs.http.impl.key1", "val1",
        "fs.http.impl.key2", "val2"
    );

    Map<String, String> expectedFsMyschemeImplConfs = ImmutableMap.of(// Scheme without subkeys
        "fs.myscheme.impl", "org.apache.samza.MySchemeFileSystem"
    );

    assertEquals(Arrays.asList("http", "myscheme"), manager.getSchemes());
    assertEquals(expectedFsHttpImplConfs, manager.getSchemeConfig("http"));
    assertEquals(expectedFsMyschemeImplConfs, manager.getSchemeConfig("myscheme"));
  }
}