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* Licensed to the Apache Software Foundation (ASF) under one
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* 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 org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect;
import org.apache.tinkerpop.gremlin.LoadGraphWith;
import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest;
import org.apache.tinkerpop.gremlin.process.GremlinProcessRunner;
import org.apache.tinkerpop.gremlin.process.traversal.Path;
import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
import org.apache.tinkerpop.gremlin.process.traversal.step.util.MapHelper;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.apache.tinkerpop.gremlin.LoadGraphWith.GraphData.MODERN;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
@RunWith(GremlinProcessRunner.class)
public abstract class AggregateTest extends AbstractGremlinProcessTest {
public abstract Traversal<Vertex, List<String>> get_g_V_name_aggregateXxX_capXxX();
public abstract Traversal<Vertex, List<String>> get_g_V_aggregateXxX_byXnameX_capXxX();
public abstract Traversal<Vertex, Path> get_g_V_out_aggregateXaX_path();
public abstract Traversal<Vertex, Collection<Integer>> get_g_V_hasLabelXpersonX_aggregateXxX_byXageX_capXxX_asXyX_selectXyX();
//public abstract Traversal<Vertex, Path> get_g_v1_asXxX_bothE_asXeX_valueXweightX_exceptXwX_aggregateXwX_backXeX_otherV_jumpXx_true_trueX_path(final Object v1Id);
@Test
@LoadGraphWith(MODERN)
public void g_V_valueXnameX_aggregateXxX_capXxX() {
final Traversal<Vertex, List<String>> traversal = get_g_V_name_aggregateXxX_capXxX();
printTraversalForm(traversal);
final Collection<String> names = traversal.next();
assertFalse(traversal.hasNext());
checkListOfNames(names);
}
@Test
@LoadGraphWith(MODERN)
public void g_V_aggregateXxX_byXnameX_capXxX() {
final Traversal<Vertex, List<String>> traversal = get_g_V_aggregateXxX_byXnameX_capXxX();
printTraversalForm(traversal);
final Collection<String> names = traversal.next();
assertFalse(traversal.hasNext());
checkListOfNames(names);
}
private void checkListOfNames(Collection<String> names) {
assertEquals(6, names.size());
assertTrue(names.contains("marko"));
assertTrue(names.contains("josh"));
assertTrue(names.contains("peter"));
assertTrue(names.contains("lop"));
assertTrue(names.contains("vadas"));
assertTrue(names.contains("ripple"));
}
@Test
@LoadGraphWith(MODERN)
public void g_V_out_aggregateXaX_path() {
final Traversal<Vertex, Path> traversal = get_g_V_out_aggregateXaX_path();
printTraversalForm(traversal);
int count = 0;
final Map<String, Long> firstStepCounts = new HashMap<>();
final Map<String, Long> secondStepCounts = new HashMap<>();
while (traversal.hasNext()) {
count++;
final Path path = traversal.next();
final String first = path.get(0).toString();
final String second = path.get(1).toString();
assertThat(first, not(second));
MapHelper.incr(firstStepCounts, first, 1l);
MapHelper.incr(secondStepCounts, second, 1l);
}
assertEquals(6, count);
assertEquals(3, firstStepCounts.size());
assertEquals(4, secondStepCounts.size());
assertTrue(firstStepCounts.values().contains(3l));
assertTrue(firstStepCounts.values().contains(2l));
assertTrue(firstStepCounts.values().contains(1l));
assertTrue(secondStepCounts.values().contains(3l));
assertTrue(secondStepCounts.values().contains(1l));
}
@Test
@LoadGraphWith(MODERN)
public void g_V_hasLabelXpersonX_aggregateXxX_byXageX_capXxX_asXyX_selectXyX() {
final Traversal<Vertex, Collection<Integer>> traversal = get_g_V_hasLabelXpersonX_aggregateXxX_byXageX_capXxX_asXyX_selectXyX();
final Collection<Integer> ages = traversal.next();
assertTrue(ages instanceof BulkSet);
assertEquals(4, ages.size());
assertTrue(ages.contains(29));
assertTrue(ages.contains(27));
assertTrue(ages.contains(32));
assertTrue(ages.contains(35));
final BulkSet<Integer> bulkSet = new BulkSet<>();
bulkSet.add(29);
bulkSet.add(27);
bulkSet.add(32);
bulkSet.add(35);
assertEquals(bulkSet, ages); // ensure bulk set equality
assertFalse(traversal.hasNext());
}
/*@Test
@LoadGraphWith(CLASSIC)
public void g_v1_asXxX_bothE_asXeX_valueXweightX_exceptXwX_aggregateXwX_backXeX_otherV_jumpXx_true_trueX_path() {
Iterator<Path> traversal = get_g_v1_asXxX_bothE_asXeX_valueXweightX_exceptXwX_aggregateXwX_backXeX_otherV_jumpXx_true_trueX_path(convertToVertexId("marko"));
System.out.println("Testing: " + traversal);
final List<Path> paths = StreamFactory.stream(traversal).collect(Collectors.toList());
// for OLTP it's a roulette game; the result can change depending on which path is taken first by the traverser (this makes some cool real world use cases possible)
// Senzari use case: generate a random playlist without artist repetitions
assertEquals(4, paths.size());
assertEquals(3, paths.stream().filter(path -> path.size() == 3).count());
assertEquals(1, paths.stream().filter(path -> path.size() == 5).count());
assertFalse(traversal.hasNext());
}*/
public static class Traversals extends AggregateTest {
@Override
public Traversal<Vertex, List<String>> get_g_V_name_aggregateXxX_capXxX() {
return g.V().values("name").aggregate("x").cap("x");
}
@Override
public Traversal<Vertex, List<String>> get_g_V_aggregateXxX_byXnameX_capXxX() {
return g.V().aggregate("x").by("name").cap("x");
}
@Override
public Traversal<Vertex, Path> get_g_V_out_aggregateXaX_path() {
return g.V().out().aggregate("a").path();
}
@Override
public Traversal<Vertex, Collection<Integer>> get_g_V_hasLabelXpersonX_aggregateXxX_byXageX_capXxX_asXyX_selectXyX() {
return g.V().hasLabel("person").aggregate("x").by("age").cap("x").as("y").select("y");
}
/*public Traversal<Vertex, Path> get_g_v1_asXxX_bothE_asXeX_valueXweightX_exceptXwX_aggregateXwX_backXeX_otherV_jumpXx_true_trueX_path(final Object v1Id) {
return g.V(1).as("x").bothE().as("e").value("weight").except("w").aggregate("w").back("e").otherV().jump("x", t -> true, t -> true).path();
}*/
}
}