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.controller.internal;
  
  import static junit.framework.Assert.assertEquals;
  import static org.easymock.EasyMock.capture;
  import static org.easymock.EasyMock.createStrictMock;
  import static org.easymock.EasyMock.expect;
  import static org.easymock.EasyMock.replay;
  import static org.easymock.EasyMock.reset;
  import static org.easymock.EasyMock.verify;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.ambari.server.controller.predicate.AndPredicate;
  import org.apache.ambari.server.controller.predicate.CategoryIsEmptyPredicate;
  import org.apache.ambari.server.controller.predicate.OrPredicate;
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.spi.ResourceProvider;
  import org.apache.ambari.server.controller.utilities.PredicateBuilder;
  import org.apache.ambari.server.controller.utilities.PredicateHelper;
  import org.apache.ambari.server.controller.utilities.PropertyHelper;
  import org.easymock.Capture;
  import org.easymock.EasyMock;
  import org.junit.Test;
  
  import junit.framework.Assert;
  
  /**
   * Tests for SimplifyingPredicateVisitor
   */
  public class SimplifyingPredicateVisitorTest {
  
    private static final String PROPERTY_A = PropertyHelper.getPropertyId("category", "A");
    private static final String PROPERTY_B = PropertyHelper.getPropertyId("category", "B");
    private static final String PROPERTY_C = PropertyHelper.getPropertyId("category", "C");
    private static final String PROPERTY_D = PropertyHelper.getPropertyId("category", "D");
  
    private static final Predicate PREDICATE_1 = new PredicateBuilder().property(PROPERTY_A).equals("Monkey").toPredicate();
    private static final Predicate PREDICATE_2 = new PredicateBuilder().property(PROPERTY_B).equals("Runner").toPredicate();
    private static final Predicate PREDICATE_3 = new AndPredicate(PREDICATE_1, PREDICATE_2);
    private static final Predicate PREDICATE_4 = new OrPredicate(PREDICATE_1, PREDICATE_2);
    private static final Predicate PREDICATE_5 = new PredicateBuilder().property(PROPERTY_C).equals("Racer").toPredicate();
    private static final Predicate PREDICATE_6 = new OrPredicate(PREDICATE_5, PREDICATE_4);
    private static final Predicate PREDICATE_7 = new PredicateBuilder().property(PROPERTY_C).equals("Power").toPredicate();
    private static final Predicate PREDICATE_8 = new OrPredicate(PREDICATE_6, PREDICATE_7);
    private static final Predicate PREDICATE_9 = new AndPredicate(PREDICATE_1, PREDICATE_8);
    private static final Predicate PREDICATE_10 = new OrPredicate(PREDICATE_3, PREDICATE_5);
    private static final Predicate PREDICATE_11 = new AndPredicate(PREDICATE_4, PREDICATE_10);
    private static final Predicate PREDICATE_12 = new PredicateBuilder().property(PROPERTY_D).equals("Installer").toPredicate();
    private static final Predicate PREDICATE_13 = new AndPredicate(PREDICATE_1, PREDICATE_12);
    private static final Predicate PREDICATE_14 = new PredicateBuilder().property(PROPERTY_D).greaterThan(12).toPredicate();
    private static final Predicate PREDICATE_15 = new AndPredicate(PREDICATE_1, PREDICATE_14);
    private static final Predicate PREDICATE_16 = new CategoryIsEmptyPredicate("cat1");
  
    @Test
    public void testVisit() {
  
      ResourceProvider provider = createStrictMock(ResourceProvider.class);
      Capture<Set<String>> propertiesCapture = EasyMock.newCapture();
  
      SimplifyingPredicateVisitor visitor = new SimplifyingPredicateVisitor(provider);
  
      //expectations
  
      expect(provider.checkPropertyIds(capture(propertiesCapture))).andReturn(Collections.emptySet()).anyTimes();
  
      replay(provider);
  
      PredicateHelper.visit(PREDICATE_1, visitor);
  
      List<Predicate> simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(1, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(0));
      Set<String> setProps = propertiesCapture.getValue();
      assertEquals(1, setProps.size());
      assertEquals(PROPERTY_A, setProps.iterator().next());
      // ---
      PredicateHelper.visit(PREDICATE_3, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(1, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_3, simplifiedPredicates.get(0));
  
      // ---
      PredicateHelper.visit(PREDICATE_4, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(2, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(0));
      Assert.assertEquals(PREDICATE_2, simplifiedPredicates.get(1));
  
      // ---
      PredicateHelper.visit(PREDICATE_6, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(3, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_5, simplifiedPredicates.get(0));
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(1));
      Assert.assertEquals(PREDICATE_2, simplifiedPredicates.get(2));
  
      // ---
      PredicateHelper.visit(PREDICATE_8, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(4, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_5, simplifiedPredicates.get(0));
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(1));
      Assert.assertEquals(PREDICATE_2, simplifiedPredicates.get(2));
      Assert.assertEquals(PREDICATE_7, simplifiedPredicates.get(3));
  
      // ---
      PredicateHelper.visit(PREDICATE_9, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(4, simplifiedPredicates.size());
  //    Assert.assertEquals(???, simplifiedPredicates.get(0));
  
      // ---
      PredicateHelper.visit(PREDICATE_11, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(4, simplifiedPredicates.size());
  //    Assert.assertEquals(???, simplifiedPredicates.get(0));
  
      // ---
      PredicateHelper.visit(PREDICATE_16, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(1, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_16, simplifiedPredicates.get(0));
  
      //reset assertions.  For property D, indicate that it is not supported.
      verify(provider);
      reset(provider);
      expect(provider.checkPropertyIds(capture(propertiesCapture))).andReturn(Collections.emptySet());
      expect(provider.checkPropertyIds(capture(propertiesCapture))).andReturn(Collections.singleton(PROPERTY_D));
      replay(provider);
  
      // ---
      PredicateHelper.visit(PREDICATE_13, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(1, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(0));
  
      verify(provider);
      reset(provider);
      expect(provider.checkPropertyIds(capture(propertiesCapture))).andReturn(Collections.emptySet()).anyTimes();
      replay(provider);
  
      // ---
      PredicateHelper.visit(PREDICATE_15, visitor);
  
      simplifiedPredicates = visitor.getSimplifiedPredicates();
  
      Assert.assertEquals(1, simplifiedPredicates.size());
      Assert.assertEquals(PREDICATE_1, simplifiedPredicates.get(0));
  
      verify(provider);
    }
  }
  