com.salesforce.kafka.test.junit4.SharedZookeeperTestResource Maven / Gradle / Ivy

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/**
 * Copyright (c) 2017-2021, Salesforce.com, Inc.
 * All rights reserved.
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 *
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package com.salesforce.kafka.test.junit4;

import com.salesforce.kafka.test.AbstractZookeeperTestResource;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

/**
 * Creates and stands up an internal test Zookeeper server to be shared across test cases within the same test class.
 *
 * Example within your Test class.
 *
 *   @ClassRule
 *   public static final SharedZookeeperTestResource sharedZookeeperTestResource = new sharedZookeeperTestResource();
 *
 * Within your test case method:
 *   sharedZookeeperTestResource.getZookeeperTestServer()...
 */
public class SharedZookeeperTestResource extends AbstractZookeeperTestResource implements TestRule {
    /**
     * Here we stand up an internal test zookeeper service.
     * once for all tests that use this shared resource.
     * @throws RuntimeException on startup errors.
     */
    private void before() throws RuntimeException {
        getZookeeperTestServer().start();
    }

    /**
     * Here we shut down the internal test zookeeper service.
     * @throws RuntimeException on shutdown errors.
     */
    private void after() throws RuntimeException {
        getZookeeperTestServer().stop();
    }

    @Override
    public Statement apply(final Statement base, final Description description) {
        return new Statement() {
            @Override
            public void evaluate() throws Throwable {
                before();
                try {
                    base.evaluate();
                } finally {
                    after();
                }
            }
        };
    }
}