/*
 * 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.accumulo.fate.util;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.security.Security;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Test the AddressUtil class.
 *
 */
public class AddressUtilTest {

  private static final Logger log = LoggerFactory.getLogger(AddressUtilTest.class);

  @Test
  public void testGetNegativeTtl() {
    log.info("Checking that we can get the ttl on dns failures.");
    int expectedTtl = 20;
    boolean expectException = false;
    /* TODO ACCUMULO-2242 replace all of this with Powermock on the Security class */
    try {
      Security.setProperty("networkaddress.cache.negative.ttl", Integer.toString(expectedTtl));
    } catch (SecurityException exception) {
      log.warn(
          "We can't set the DNS cache period, so we're only testing fetching the system value.");
      expectedTtl = 10;
    }
    try {
      expectedTtl = Integer.parseInt(Security.getProperty("networkaddress.cache.negative.ttl"));
    } catch (SecurityException exception) {
      log.debug("Security manager won't let us fetch the property, testing default path.");
      expectedTtl = 10;
    } catch (NumberFormatException exception) {
      log.debug("property isn't a number, testing default path.");
      expectedTtl = 10;
    }
    if (-1 == expectedTtl) {
      log.debug("property is set to 'forever', testing exception path");
      expectException = true;
    }
    if (0 > expectedTtl) {
      log.debug("property is a negative value other than 'forever', testing default path.");
      expectedTtl = 10;
    }
    try {
      if (expectException) {
        log.info("AddressUtil is (hopefully) going to spit out an error about DNS lookups. "
            + "you can ignore it.");
      }
      int result = AddressUtil.getAddressCacheNegativeTtl(null);
      if (expectException) {
        fail("The JVM Security settings cache DNS failures forever. "
            + "In this case we expect an exception but didn't get one.");
      }
      assertEquals("Didn't get the ttl we expected", expectedTtl, result);
    } catch (IllegalArgumentException exception) {
      if (!expectException) {
        log.error("Got an exception when we weren't expecting.", exception);
        fail("We only expect to throw an IllegalArgumentException when the JVM "
            + "caches DNS failures forever.");
      }
    }
  }

  @Test
  public void testGetNegativeTtlThrowsOnForever() {
    log.info("When DNS is cached forever, we should throw.");
    /* TODO ACCUMULO-2242 replace all of this with Powermock on the Security class */
    try {
      Security.setProperty("networkaddress.cache.negative.ttl", "-1");
    } catch (SecurityException exception) {
      log.error("We can't set the DNS cache period, so this test is effectively ignored.");
      return;
    }
    try {
      log.info("AddressUtil is (hopefully) going to spit out an error about DNS lookups. "
          + "you can ignore it.");
      AddressUtil.getAddressCacheNegativeTtl(null);
      fail("The JVM Security settings cache DNS failures forever, this should cause an exception.");
    } catch (IllegalArgumentException exception) {
      // expected
    }
  }
}