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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, 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.
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  package com.datastax.oss.driver.internal.core.addresstranslation;
  
  import static com.datastax.oss.driver.api.core.config.DefaultDriverOption.ADDRESS_TRANSLATOR_DEFAULT_ADDRESS;
  import static com.datastax.oss.driver.api.core.config.DefaultDriverOption.ADDRESS_TRANSLATOR_SUBNET_ADDRESSES;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import com.datastax.oss.driver.api.core.config.DriverExecutionProfile;
  import com.datastax.oss.driver.internal.core.context.DefaultDriverContext;
  import com.datastax.oss.driver.internal.core.context.MockedDriverContextFactory;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
  import java.net.InetSocketAddress;
  import java.util.Map;
  import org.junit.Test;
  
  @SuppressWarnings("resource")
  public class SubnetAddressTranslatorTest {
  
    @Test
    public void should_translate_to_correct_subnet_address_ipv4() {
      Map<String, String> subnetAddresses =
          ImmutableMap.of(
              "\"100.64.0.0/15\"", "cassandra.datacenter1.com:19042",
              "100.66.0.\"0/15\"", "cassandra.datacenter2.com:19042");
      DefaultDriverContext context = context(subnetAddresses);
      SubnetAddressTranslator translator = new SubnetAddressTranslator(context);
      InetSocketAddress address = new InetSocketAddress("100.64.0.1", 9042);
      assertThat(translator.translate(address))
          .isEqualTo(InetSocketAddress.createUnresolved("cassandra.datacenter1.com", 19042));
    }
  
    @Test
    public void should_translate_to_correct_subnet_address_ipv6() {
      Map<String, String> subnetAddresses =
          ImmutableMap.of(
              "\"::ffff:6440:0/111\"", "cassandra.datacenter1.com:19042",
              "\"::ffff:6442:0/111\"", "cassandra.datacenter2.com:19042");
      DefaultDriverContext context = context(subnetAddresses);
      SubnetAddressTranslator translator = new SubnetAddressTranslator(context);
      InetSocketAddress address = new InetSocketAddress("::ffff:6440:1", 9042);
      assertThat(translator.translate(address))
          .isEqualTo(InetSocketAddress.createUnresolved("cassandra.datacenter1.com", 19042));
    }
  
    @Test
    public void should_translate_to_default_address() {
      DefaultDriverContext context = context(ImmutableMap.of());
      when(context
              .getConfig()
              .getDefaultProfile()
              .getString(ADDRESS_TRANSLATOR_DEFAULT_ADDRESS, null))
          .thenReturn("cassandra.com:19042");
      SubnetAddressTranslator translator = new SubnetAddressTranslator(context);
      InetSocketAddress address = new InetSocketAddress("100.68.0.1", 9042);
      assertThat(translator.translate(address))
          .isEqualTo(InetSocketAddress.createUnresolved("cassandra.com", 19042));
    }
  
    @Test
    public void should_pass_through_not_matched_address() {
      DefaultDriverContext context = context(ImmutableMap.of());
      SubnetAddressTranslator translator = new SubnetAddressTranslator(context);
      InetSocketAddress address = new InetSocketAddress("100.68.0.1", 9042);
      assertThat(translator.translate(address)).isEqualTo(address);
    }
  
    @Test
    public void should_fail_on_intersecting_subnets_ipv4() {
      Map<String, String> subnetAddresses =
          ImmutableMap.of(
              "\"100.64.0.0/15\"", "cassandra.datacenter1.com:19042",
              "100.65.0.\"0/16\"", "cassandra.datacenter2.com:19042");
      DefaultDriverContext context = context(subnetAddresses);
      assertThatIllegalArgumentException()
          .isThrownBy(() -> new SubnetAddressTranslator(context))
          .withMessage(
              "Configured subnets are overlapping: "
                  + String.format(
                      "SubnetAddress[subnet=[100, 64, 0, 0], address=%s], ",
                      InetSocketAddress.createUnresolved("cassandra.datacenter1.com", 19042))
                  + String.format(
                      "SubnetAddress[subnet=[100, 65, 0, 0], address=%s]",
                      InetSocketAddress.createUnresolved("cassandra.datacenter2.com", 19042)));
    }
  
    @Test
    public void should_fail_on_intersecting_subnets_ipv6() {
      Map<String, String> subnetAddresses =
          ImmutableMap.of(
              "\"::ffff:6440:0/111\"", "cassandra.datacenter1.com:19042",
              "\"::ffff:6441:0/112\"", "cassandra.datacenter2.com:19042");
      DefaultDriverContext context = context(subnetAddresses);
      assertThatIllegalArgumentException()
          .isThrownBy(() -> new SubnetAddressTranslator(context))
          .withMessage(
              "Configured subnets are overlapping: "
                  + String.format(
                      "SubnetAddress[subnet=[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 100, 64, 0, 0], address=%s], ",
                      InetSocketAddress.createUnresolved("cassandra.datacenter1.com", 19042))
                  + String.format(
                      "SubnetAddress[subnet=[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 100, 65, 0, 0], address=%s]",
                      InetSocketAddress.createUnresolved("cassandra.datacenter2.com", 19042)));
    }
  
    @Test
    public void should_fail_on_subnet_address_without_port() {
      Map<String, String> subnetAddresses =
          ImmutableMap.of("\"100.64.0.0/15\"", "cassandra.datacenter1.com");
      DefaultDriverContext context = context(subnetAddresses);
      assertThatIllegalArgumentException()
          .isThrownBy(() -> new SubnetAddressTranslator(context))
          .withMessage("Invalid address cassandra.datacenter1.com (expecting format host:port)");
    }
  
    @Test
    public void should_fail_on_default_address_without_port() {
      DefaultDriverContext context = context(ImmutableMap.of());
      when(context
              .getConfig()
              .getDefaultProfile()
              .getString(ADDRESS_TRANSLATOR_DEFAULT_ADDRESS, null))
          .thenReturn("cassandra.com");
      assertThatIllegalArgumentException()
          .isThrownBy(() -> new SubnetAddressTranslator(context))
          .withMessage("Invalid address cassandra.com (expecting format host:port)");
    }
  
    private static DefaultDriverContext context(Map<String, String> subnetAddresses) {
      DriverExecutionProfile profile = mock(DriverExecutionProfile.class);
      when(profile.getStringMap(ADDRESS_TRANSLATOR_SUBNET_ADDRESSES)).thenReturn(subnetAddresses);
      return MockedDriverContextFactory.defaultDriverContext(profile);
    }
  }
  