/**
 * 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, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hdfs.security;

import java.util.EnumSet;

import org.apache.hadoop.io.TestWritable;

import junit.framework.TestCase;

/** Unit tests for access tokens */
public class TestAccessToken extends TestCase {
  long accessKeyUpdateInterval = 10 * 60 * 1000; // 10 mins
  long accessTokenLifetime = 2 * 60 * 1000; // 2 mins
  long blockID1 = 0L;
  long blockID2 = 10L;
  long blockID3 = -108L;

  /** test Writable */
  public void testWritable() throws Exception {
    TestWritable.testWritable(ExportedAccessKeys.DUMMY_KEYS);
    AccessTokenHandler handler = new AccessTokenHandler(true,
        accessKeyUpdateInterval, accessTokenLifetime);
    ExportedAccessKeys keys = handler.exportKeys();
    TestWritable.testWritable(keys);
    TestWritable.testWritable(BlockAccessToken.DUMMY_TOKEN);
    BlockAccessToken token = handler.generateToken(blockID3, EnumSet
        .allOf(AccessTokenHandler.AccessMode.class));
    TestWritable.testWritable(token);
  }

  private void tokenGenerationAndVerification(AccessTokenHandler master,
      AccessTokenHandler slave) throws Exception {
    // single-mode tokens
    for (AccessTokenHandler.AccessMode mode : AccessTokenHandler.AccessMode
        .values()) {
      // generated by master
      BlockAccessToken token1 = master.generateToken(blockID1, EnumSet.of(mode));
      assertTrue(master.checkAccess(token1, null, blockID1, mode));
      assertTrue(slave.checkAccess(token1, null, blockID1, mode));
      // generated by slave
      BlockAccessToken token2 = slave.generateToken(blockID2, EnumSet.of(mode));
      assertTrue(master.checkAccess(token2, null, blockID2, mode));
      assertTrue(slave.checkAccess(token2, null, blockID2, mode));
    }
    // multi-mode tokens
    BlockAccessToken mtoken = master.generateToken(blockID3, EnumSet
        .allOf(AccessTokenHandler.AccessMode.class));
    for (AccessTokenHandler.AccessMode mode : AccessTokenHandler.AccessMode
        .values()) {
      assertTrue(master.checkAccess(mtoken, null, blockID3, mode));
      assertTrue(slave.checkAccess(mtoken, null, blockID3, mode));
    }
  }

  /** test access key and token handling */
  public void testAccessTokenHandler() throws Exception {
    AccessTokenHandler masterHandler = new AccessTokenHandler(true,
        accessKeyUpdateInterval, accessTokenLifetime);
    AccessTokenHandler slaveHandler = new AccessTokenHandler(false,
        accessKeyUpdateInterval, accessTokenLifetime);
    ExportedAccessKeys keys = masterHandler.exportKeys();
    slaveHandler.setKeys(keys);
    tokenGenerationAndVerification(masterHandler, slaveHandler);
    // key updating
    masterHandler.updateKeys();
    tokenGenerationAndVerification(masterHandler, slaveHandler);
    keys = masterHandler.exportKeys();
    slaveHandler.setKeys(keys);
    tokenGenerationAndVerification(masterHandler, slaveHandler);
  }

}