content: /*
   * 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.cassandra.db.guardrails;
  
  import java.util.Collections;
  import java.util.EnumSet;
  import java.util.Set;
  import java.util.function.BiConsumer;
  import java.util.function.Function;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import org.junit.Before;
  import org.junit.Test;
  
  import org.apache.cassandra.db.ConsistencyLevel;
  
  /**
   * Utilty class for testing the guardrails for read/write consistency levels.
   */
  public abstract class GuardrailConsistencyLevelsTester extends GuardrailTester
  {
      private final String warnedPropertyName;
      private final String disallowePropertyName;
      private final Function<Guardrails, Set<String>> warnedGetter;
      private final Function<Guardrails, Set<String>> disallowedGetter;
      private final Function<Guardrails, String> warnedCSVGetter;
      private final Function<Guardrails, String> disallowedCSVGetter;
      private final BiConsumer<Guardrails, Set<String>> warnedSetter;
      private final BiConsumer<Guardrails, Set<String>> disallowedSetter;
      private final BiConsumer<Guardrails, String> warnedCSVSetter;
      private final BiConsumer<Guardrails, String> disallowedCSVSetter;
  
      public GuardrailConsistencyLevelsTester(String warnedPropertyName,
                                              String disallowePropertyName,
                                              Values<ConsistencyLevel> guardrail,
                                              Function<Guardrails, Set<String>> warnedGetter,
                                              Function<Guardrails, Set<String>> disallowedGetter,
                                              Function<Guardrails, String> warnedCSVGetter,
                                              Function<Guardrails, String> disallowedCSVGetter,
                                              BiConsumer<Guardrails, Set<String>> warnedSetter,
                                              BiConsumer<Guardrails, Set<String>> disallowedSetter,
                                              BiConsumer<Guardrails, String> warnedCSVSetter,
                                              BiConsumer<Guardrails, String> disallowedCSVSetter)
      {
          super(guardrail);
          this.warnedPropertyName = warnedPropertyName;
          this.disallowePropertyName = disallowePropertyName;
          this.warnedGetter = warnedGetter;
          this.disallowedGetter = disallowedGetter;
          this.warnedCSVGetter = g -> sortCSV(warnedCSVGetter.apply(g));
          this.disallowedCSVGetter = g -> sortCSV(disallowedCSVGetter.apply(g));
          this.warnedSetter = warnedSetter;
          this.disallowedSetter = disallowedSetter;
          this.warnedCSVSetter = warnedCSVSetter;
          this.disallowedCSVSetter = disallowedCSVSetter;
      }
  
      @Before
      public void before()
      {
          warnConsistencyLevels();
          disableConsistencyLevels();
      }
  
      protected void warnConsistencyLevels(ConsistencyLevel... consistencyLevels)
      {
          warnedSetter.accept(guardrails(), Stream.of(consistencyLevels).map(ConsistencyLevel::name).collect(Collectors.toSet()));
      }
  
      protected void disableConsistencyLevels(ConsistencyLevel... consistencyLevels)
      {
          disallowedSetter.accept(guardrails(), Stream.of(consistencyLevels).map(ConsistencyLevel::name).collect(Collectors.toSet()));
      }
  
      @Test
      public void testConfigValidation()
      {
          String message = "Invalid value for %s: null is not allowed";
          assertInvalidProperty(warnedSetter, null, message, warnedPropertyName);
          assertInvalidProperty(disallowedSetter, null, message, disallowePropertyName);
  
          assertValidProperty(Collections.emptySet());
          assertValidProperty(EnumSet.allOf(ConsistencyLevel.class));
  
          assertValidPropertyCSV("");
          assertValidPropertyCSV(EnumSet.allOf(ConsistencyLevel.class)
                                        .stream()
                                        .map(ConsistencyLevel::toString)
                                        .collect(Collectors.joining(",")));
  
          assertInvalidPropertyCSV("invalid", "INVALID");
          assertInvalidPropertyCSV("ONE,invalid1,invalid2", "INVALID1");
          assertInvalidPropertyCSV("invalid1,invalid2,ONE", "INVALID1");
          assertInvalidPropertyCSV("invalid1,ONE,invalid2", "INVALID1");
      }
  
      private void assertValidProperty(Set<ConsistencyLevel> input)
      {
          Set<String> properties = input.stream().map(ConsistencyLevel::name).collect(Collectors.toSet());
          assertValidProperty(warnedSetter, warnedGetter, properties);
          assertValidProperty(disallowedSetter, disallowedGetter, properties);
      }
  
      private void assertValidPropertyCSV(String csv)
      {
          csv = sortCSV(csv);
          assertValidProperty(warnedCSVSetter, warnedCSVGetter, csv);
          assertValidProperty(disallowedCSVSetter, disallowedCSVGetter, csv);
      }
  
      private void assertInvalidPropertyCSV(String properties, String rejected)
      {
          String message = "No enum constant org.apache.cassandra.db.ConsistencyLevel.%s";
          assertInvalidProperty(warnedCSVSetter, properties, message, rejected);
          assertInvalidProperty(disallowedCSVSetter, properties, message, rejected);
      }
  }
  