import org.apache.hadoop.hdfs.tools.GetConf.CommandHandler; //导入依赖的package包/类
/**
 * Test empty configuration
 */
@Test(timeout=10000)
public void testEmptyConf() throws Exception {
  HdfsConfiguration conf = new HdfsConfiguration(false);
  // Verify getting addresses fails
  getAddressListFromTool(TestType.NAMENODE, conf, false);
  System.out.println(getAddressListFromTool(TestType.BACKUP, conf, false));
  getAddressListFromTool(TestType.SECONDARY, conf, false);
  getAddressListFromTool(TestType.NNRPCADDRESSES, conf, false);
  for (Command cmd : Command.values()) {
    String arg = cmd.getName();
    CommandHandler handler = Command.getHandler(arg);
    assertNotNull("missing handler: " + cmd, handler);
    if (handler.key != null) {
      // First test with configuration missing the required key
      String[] args = {handler.key};
      runTool(conf, args, false);
    }
  }
}
 

import org.apache.hadoop.hdfs.tools.GetConf.CommandHandler; //导入依赖的package包/类
/**
 * Test empty configuration
 */
@Test
public void testEmptyConf() throws Exception {
  HdfsConfiguration conf = new HdfsConfiguration(false);
  // Verify getting addresses fails
  getAddressListFromTool(TestType.NAMENODE, conf, false);
  getAddressListFromTool(TestType.NNRPCADDRESSES, conf, false);
  for (Command cmd : Command.values()) {
    String arg = cmd.getName();
    CommandHandler handler = Command.getHandler(arg);
    assertNotNull("missing handler: " + cmd, handler);
    if (handler.key != null) {
      // First test with configuration missing the required key
      String[] args = {handler.key};
      runTool(conf, args, false);
    }
  }
}
 

import org.apache.hadoop.hdfs.tools.GetConf.CommandHandler; //导入依赖的package包/类
/**
 * Tests commands other than {@link Command#NAMENODE}, {@link Command#BACKUP},
 * {@link Command#SECONDARY} and {@link Command#NNRPCADDRESSES}
 */
@Test(timeout=10000)
public void testTool() throws Exception {
  HdfsConfiguration conf = new HdfsConfiguration(false);
  for (Command cmd : Command.values()) {
    CommandHandler handler = Command.getHandler(cmd.getName());
    if (handler.key != null && !"-confKey".equals(cmd.getName())) {
      // Add the key to the conf and ensure tool returns the right value
      String[] args = {cmd.getName()};
      conf.set(handler.key, "value");
      assertTrue(runTool(conf, args, true).contains("value"));
    }
  }
}
 

import org.apache.hadoop.hdfs.tools.GetConf.CommandHandler; //导入依赖的package包/类
/**
 * Tests commands other than {@link Command#NAMENODE}, {@link
 * Command#BACKUP},
 * {@link Command#SECONDARY} and {@link Command#NNRPCADDRESSES}
 */
@Test
public void testTool() throws Exception {
  HdfsConfiguration conf = new HdfsConfiguration(false);
  for (Command cmd : Command.values()) {
    CommandHandler handler = Command.getHandler(cmd.getName());
    if (handler.key != null && !"-confKey".equals(cmd.getName())) {
      // Add the key to the conf and ensure tool returns the right value
      String[] args = {cmd.getName()};
      conf.set(handler.key, "value");
      assertTrue(runTool(conf, args, true).contains("value"));
    }
  }
}