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.ambari.server.collections;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Map;
  
  import org.apache.ambari.server.collections.functors.AndPredicate;
  import org.apache.ambari.server.collections.functors.ContainsPredicate;
  import org.apache.ambari.server.collections.functors.ContextTransformer;
  import org.apache.ambari.server.collections.functors.EqualsPredicate;
  import org.apache.ambari.server.collections.functors.NotPredicate;
  import org.apache.ambari.server.collections.functors.OrPredicate;
  import org.junit.Test;
  
  import junit.framework.Assert;
  
  public class PredicateUtilsTest {
    @Test
    public void toMap() throws Exception {
      // Test null predicate safely returns null
      Assert.assertNull(PredicateUtils.toMap(null));
  
      Assert.assertEquals(createMap(), PredicateUtils.toMap(createPredicate()));
    }
  
    @Test
    public void fromMap() throws Exception {
      verifyPredicate(PredicateUtils.fromMap(createMap()));
    }
  
    @Test
    public void toJSON() throws Exception {
      // Test null predicate safely returns null
      Assert.assertNull(PredicateUtils.toJSON(null));
  
      Assert.assertEquals(createJSON(), PredicateUtils.toJSON(createPredicate()));
    }
  
    @Test
    public void fromJSON() throws Exception {
      verifyPredicate(PredicateUtils.fromJSON(createJSON()));
    }
  
    private Predicate createPredicate() {
      ContextTransformer transformer1 = new ContextTransformer("services");
      ContextTransformer transformer2 = new ContextTransformer("configurations/service-env/property1");
      ContextTransformer transformer3 = new ContextTransformer("configurations/cluster-env/property1");
      ContainsPredicate predicate1 = new ContainsPredicate(transformer1, "HDFS");
      EqualsPredicate predicate2 = new EqualsPredicate(transformer2, "true");
      EqualsPredicate predicate3 = new EqualsPredicate(transformer3, "false");
  
      AndPredicate andPredicate = new AndPredicate(predicate1, predicate2);
      OrPredicate orPredicate = new OrPredicate(predicate3, andPredicate);
  
      return new NotPredicate(orPredicate);
    }
  
    private Map<String, Object> createMap() {
      Map<String, Object> andMap =
          Collections.singletonMap(
              AndPredicate.NAME, Arrays.asList(
                  Collections.<String, Object>singletonMap(ContainsPredicate.NAME, Arrays.asList("services", "HDFS")),
                  Collections.<String, Object>singletonMap(EqualsPredicate.NAME, Arrays.asList("configurations/service-env/property1", "true"))
              )
          );
  
      Map<String, Object> orMap =
          Collections.singletonMap(OrPredicate.NAME,
              Arrays.asList(
                  Collections.<String, Object>singletonMap(EqualsPredicate.NAME, Arrays.asList("configurations/cluster-env/property1", "false")),
                  andMap
              )
          );
  
      return Collections.singletonMap(NotPredicate.NAME, orMap);
    }
  
    private String createJSON() {
      String andJSON = "{\"and\":[{\"contains\":[\"services\",\"HDFS\"]},{\"equals\":[\"configurations/service-env/property1\",\"true\"]}]}";
      String orJSON = "{\"or\":[{\"equals\":[\"configurations/cluster-env/property1\",\"false\"]}," + andJSON + "]}";
      return "{\"not\":" + orJSON + "}";
    }
  
    private void verifyPredicate(Predicate predicate) {
      Assert.assertNotNull(predicate);
      Assert.assertEquals(NotPredicate.NAME, predicate.getName());
      Assert.assertTrue(predicate instanceof NotPredicate);
  
      org.apache.commons.collections4.Predicate[] predicates;
  
      predicates = ((NotPredicate) predicate).getPredicates();
      Assert.assertEquals(1, predicates.length);
  
      Assert.assertNotNull(predicates[0]);
      Assert.assertTrue(predicates[0] instanceof OrPredicate);
      Assert.assertEquals(OrPredicate.NAME, ((OrPredicate) predicates[0]).getName());
  
      predicates = ((OrPredicate) predicates[0]).getPredicates();
      Assert.assertEquals(2, predicates.length);
  
      Assert.assertNotNull(predicates[0]);
      Assert.assertTrue(predicates[0] instanceof EqualsPredicate);
      Assert.assertEquals(EqualsPredicate.NAME, ((EqualsPredicate) predicates[0]).getName());
      Assert.assertEquals("configurations/cluster-env/property1", ((EqualsPredicate) predicates[0]).getContextKey());
      Assert.assertEquals("false", ((EqualsPredicate) predicates[0]).getValue());
  
      Assert.assertNotNull(predicates[1]);
      Assert.assertTrue(predicates[1] instanceof AndPredicate);
      Assert.assertEquals(AndPredicate.NAME, ((AndPredicate) predicates[1]).getName());
  
      predicates = ((AndPredicate) predicates[1]).getPredicates();
      Assert.assertEquals(2, predicates.length);
  
      Assert.assertNotNull(predicates[0]);
      Assert.assertTrue(predicates[0] instanceof ContainsPredicate);
      Assert.assertEquals(ContainsPredicate.NAME, ((ContainsPredicate) predicates[0]).getName());
      Assert.assertEquals("services", ((ContainsPredicate) predicates[0]).getContextKey());
      Assert.assertEquals("HDFS", ((ContainsPredicate) predicates[0]).getValue());
  
      Assert.assertNotNull(predicates[1]);
      Assert.assertTrue(predicates[1] instanceof EqualsPredicate);
      Assert.assertEquals(EqualsPredicate.NAME, ((EqualsPredicate) predicates[1]).getName());
      Assert.assertEquals("configurations/service-env/property1", ((EqualsPredicate) predicates[1]).getContextKey());
      Assert.assertEquals("true", ((EqualsPredicate) predicates[1]).getValue());
    }
  }