| /* |
| * 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.tinkerpop.gremlin.process.traversal.step.map; |
| |
| 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.Traversal; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.Map; |
| |
| import static org.apache.tinkerpop.gremlin.LoadGraphWith.GraphData.MODERN; |
| import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.bothE; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| @RunWith(GremlinProcessRunner.class) |
| public abstract class MeanTest extends AbstractGremlinProcessTest { |
| |
| public abstract Traversal<Vertex, Double> get_g_V_age_mean(); |
| |
| public abstract Traversal<Vertex, Map<String, Number>> get_g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_meanX(); |
| |
| @Test |
| @LoadGraphWith(MODERN) |
| public void g_V_age_mean() { |
| final Traversal<Vertex, Double> traversal = get_g_V_age_mean(); |
| printTraversalForm(traversal); |
| final Double mean = traversal.next(); |
| assertEquals(30.75, mean, 0.05); |
| assertFalse(traversal.hasNext()); |
| } |
| |
| @Test |
| @LoadGraphWith(MODERN) |
| public void g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_meanX() { |
| final Traversal<Vertex, Map<String, Number>> traversal = get_g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_meanX(); |
| printTraversalForm(traversal); |
| assertTrue(traversal.hasNext()); |
| final Map<String, Number> map = traversal.next(); |
| assertFalse(traversal.hasNext()); |
| assertEquals(2, map.size()); |
| assertEquals(1.0, map.get("ripple")); |
| assertEquals(1.0 / 3, map.get("lop")); |
| } |
| |
| public static class Traversals extends MeanTest { |
| |
| @Override |
| public Traversal<Vertex, Double> get_g_V_age_mean() { |
| return g.V().values("age").mean(); |
| } |
| |
| @Override |
| public Traversal<Vertex, Map<String, Number>> get_g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_meanX() { |
| return g.V().hasLabel("software").<String, Number>group().by("name").by(bothE().values("weight").mean()); |
| } |
| } |
| } |