gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversalTest.java

/*
 * 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.dsl.graph;

import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
import org.junit.Test;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public class GraphTraversalTest {

    private static Set<String> NO_GRAPH = new HashSet<>(Arrays.asList("asAdmin", "by", "option", "iterate", "to", "from", "profile", "pageRank", "peerPressure", "program"));
    private static Set<String> NO_ANONYMOUS = new HashSet<>(Arrays.asList("start", "__"));

    @Test
    public void anonymousGraphTraversalShouldHaveMethodsOfGraphTraversal() {
        for (Method methodA : GraphTraversal.class.getMethods()) {
            if (Traversal.class.isAssignableFrom(methodA.getReturnType()) && !NO_GRAPH.contains(methodA.getName())) {
                boolean found = false;
                final String methodAName = methodA.getName();
                final String methodAParameters = Arrays.asList(methodA.getParameterTypes()).toString();
                for (final Method methodB : __.class.getMethods()) {
                    final String methodBName = methodB.getName();
                    final String methodBParameters = Arrays.asList(methodB.getParameterTypes()).toString();
                    if (methodAName.equals(methodBName) && methodAParameters.equals(methodBParameters))
                        found = true;
                }
                if (!found)
                    throw new IllegalStateException(__.class.getSimpleName() + " is missing the following method: " + methodAName + ":" + methodAParameters);
            }
        }
    }

    @Test
    public void graphTraversalShouldHaveMethodsOfAnonymousGraphTraversal() {
        for (Method methodA : __.class.getMethods()) {
            if (Traversal.class.isAssignableFrom(methodA.getReturnType()) && !NO_ANONYMOUS.contains(methodA.getName())) {
                boolean found = false;
                final String methodAName = methodA.getName();
                final String methodAParameters = Arrays.asList(methodA.getParameterTypes()).toString();
                for (final Method methodB : GraphTraversal.class.getMethods()) {
                    final String methodBName = methodB.getName();
                    final String methodBParameters = Arrays.asList(methodB.getParameterTypes()).toString();
                    if (methodAName.equals(methodBName) && methodAParameters.equals(methodBParameters))
                        found = true;
                }
                if (!found)
                    throw new IllegalStateException(GraphTraversal.class.getSimpleName() + " is missing the following method: " + methodAName + ":" + methodAParameters);
            }
        }
    }
}