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A framework for writing end-to-end integration tests using the Concourse client and server
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/*
 * Copyright (c) 2013-2015 Cinchapi, Inc.
 * 
 * Licensed 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.cinchapi.concourse.test;

import java.io.File;
import java.io.IOException;

import org.cinchapi.concourse.server.ManagedConcourseServer;
import org.cinchapi.concourse.util.ConcourseRepoCloner;
import org.cinchapi.concourse.util.Processes;

import com.google.common.base.Throwables;
import com.google.common.io.Files;

/**
 * A {@link ClientServerTest} that {@link #preUpgradeActions() creates state} in
 * an {@link #getInitialServerVersion() initial version} and then upgrades the
 * server to the latest version. Each unit test in the class is then run against
 * the upgraded server. The purpose of these kinds of test is to ensure that an
 * upgrade does not ruin any data, etc.
 * 
 * @author Jeff Nelson
 */
public abstract class UpgradeTest extends ClientServerTest {

    @Override
    protected final String getServerVersion() {
        return getInitialServerVersion();
    }

    @Override
    protected final void beforeEachTest() {
        super.beforeEachTest();
        try {
            log.info("Running pre upgrade actions...");
            preUpgradeActions();
            server.stop();
            String installer = ManagedConcourseServer
                    .buildInstallerFromRepo(ConcourseRepoCloner
                            .cloneAndGetPath());
            File src = new File(installer);
            File dest = new File(server.getInstallDirectory()
                    + "/concourse-server.bin");
            Files.copy(src, dest);
            // Run the upgrade from the installer
            log.info("Upgrading Concourse Server...");
            Process proc = new ProcessBuilder("sh", dest.getAbsolutePath(),
                    "--", "skip-integration").directory(
                    new File(server.getInstallDirectory())).start();

            Processes.waitForSuccessfulCompletion(proc);
            for (String line : Processes.getStdOut(proc)) {
                log.info(line);
            }
            server = ManagedConcourseServer.manageExistingServer(server
                    .getInstallDirectory());
            server.start();
            client = server.connect();
        }
        catch (IOException e) {
            throw Throwables.propagate(e);
        }
    }

    /**
     * Get the initial server version from which to upgrade.
     * 
     * @return the initial version
     */
    protected abstract String getInitialServerVersion();

    /**
     * Alias for {@link #beforeEachTest()}. These are the actions to run before
     * each test prior to upgrading to the latest server version.
     */
    protected abstract void preUpgradeActions();

}