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There is a newer version: 9.0.2
/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.node;

import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.network.NetworkModule;
import org.elasticsearch.common.network.NetworkService;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.common.util.MockBigArrays;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.indices.breaker.CircuitBreakerService;
import org.elasticsearch.node.internal.InternalSettingsPreparer;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.script.ScriptService;
import org.elasticsearch.search.MockSearchService;
import org.elasticsearch.search.SearchService;
import org.elasticsearch.search.fetch.FetchPhase;
import org.elasticsearch.test.transport.MockTransportService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import java.util.Collection;

/**
 * A node for testing which allows:
 * 
 *   Overriding Version.CURRENT
 *   Adding test plugins that exist on the classpath
 * 
 */
public class MockNode extends Node {
    private final Collection> classpathPlugins;

    public MockNode(Settings settings, Collection> classpathPlugins) {
        super(InternalSettingsPreparer.prepareEnvironment(settings, null), classpathPlugins);
        this.classpathPlugins = classpathPlugins;
    }

    /**
     * The classpath plugins this node was constructed with.
     */
    public Collection> getClasspathPlugins() {
        return classpathPlugins;
    }

    @Override
    protected BigArrays createBigArrays(Settings settings, CircuitBreakerService circuitBreakerService) {
        if (getPluginsService().filterPlugins(NodeMocksPlugin.class).isEmpty()) {
            return super.createBigArrays(settings, circuitBreakerService);
        }
        return new MockBigArrays(settings, circuitBreakerService);
    }


    @Override
    protected SearchService newSearchService(ClusterService clusterService, IndicesService indicesService,
                                             ThreadPool threadPool, ScriptService scriptService, BigArrays bigArrays,
                                             FetchPhase fetchPhase) {
        if (getPluginsService().filterPlugins(MockSearchService.TestPlugin.class).isEmpty()) {
            return super.newSearchService(clusterService, indicesService, threadPool, scriptService, bigArrays, fetchPhase);
        }
        return new MockSearchService(clusterService, indicesService, threadPool, scriptService, bigArrays, fetchPhase);
    }

    @Override
    protected NetworkModule createNetworkModule(Settings settings, NetworkService networkService) {
        // we use the MockTransportService.TestPlugin class as a marker to create a newtwork
        // module with this MockNetworkService. NetworkService is such an integral part of the systme
        // we don't allow to plug it in from plugins or anything. this is a test-only override and
        // can't be done in a production env.
        if (getPluginsService().filterPlugins(MockTransportService.TestPlugin.class).size() == 1) {
            return new NetworkModule(networkService, settings, false) {
                @Override
                protected void bindTransportService() {
                    bind(TransportService.class).to(MockTransportService.class).asEagerSingleton();
                }
            };
        }
        return super.createNetworkModule(settings, networkService);
    }
}