运行集成测试时嵌入 MongoDB [英] Embedded MongoDB when running integration tests

问题描述

我的问题是这个的变体.

由于我的 Java Web 应用项目需要大量读取过滤器/查询以及与 GridFS 等工具的接口，因此我正在努力想出一种以上述解决方案建议的方式使用 MongoDB 的明智方法.

Since my Java Web-app project requires a lot of read filters/queries and interfaces with tools like GridFS, I'm struggling to think of a sensible way to employ MongoDB in the way the above solution suggests.

因此，我正在考虑在集成测试的同时运行 MongoDB 的嵌入式实例.我希望它自动启动(针对每个测试或整个套件)，针对每个测试刷新数据库，然后关闭 最后.这些测试可能会在开发机器和 CI 服务器上运行，因此我的解决方案还需要便携.

Therefore, I'm considering running an embedded instance of MongoDB alongside my integration tests. I'd like it to start up automatically (either for each test or the whole suite), flush the database for every test, and shut down at the end. These tests might be run on development machines as well as the CI server, so my solution will also need to be portable.

对 MongoDB 有更多了解的任何人都可以帮助我了解这种方法的可行性，和/或建议任何可能有助于我入门的阅读材料吗?

Can anyone with more knowledge on MongoDB help me get idea of the feasibility of this approach, and/or perhaps suggest any reading material that might help me get started?

我也乐于接受人们可能对我如何解决这个问题提出的其他建议......

I'm also open to other suggestions people might have on how I could approach this problem...

推荐答案

这是接受的答案的更新(2019 年)版本@rozky(Mongo 和嵌入式 MongoDB 库都发生了很多变化).

Here's an updated (for 2019) version of the accepted answer from @rozky (a lot has been changed in both the Mongo and Embedded MongoDB libraries).

package com.example.mongo;

import com.mongodb.BasicDBObject;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import de.flapdoodle.embed.mongo.MongodExecutable;
import de.flapdoodle.embed.mongo.MongodProcess;
import de.flapdoodle.embed.mongo.MongodStarter;
import de.flapdoodle.embed.mongo.config.IMongodConfig;
import de.flapdoodle.embed.mongo.config.MongodConfigBuilder;
import de.flapdoodle.embed.mongo.config.Net;
import de.flapdoodle.embed.mongo.distribution.Version;
import de.flapdoodle.embed.process.runtime.Network;
import java.util.Date;
import org.junit.After;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;

public class EmbeddedMongoTest
{
    private static final String DATABASE_NAME = "embedded";

    private MongodExecutable mongodExe;
    private MongodProcess mongod;
    private MongoClient mongo;

    @Before
    public void beforeEach() throws Exception {
        MongodStarter starter = MongodStarter.getDefaultInstance();
        String bindIp = "localhost";
        int port = 12345;
        IMongodConfig mongodConfig = new MongodConfigBuilder()
        .version(Version.Main.PRODUCTION)
        .net(new Net(bindIp, port, Network.localhostIsIPv6()))
        .build();
        this.mongodExe = starter.prepare(mongodConfig);
        this.mongod = mongodExe.start();
        this.mongo = new MongoClient(bindIp, port);
    }

    @After
    public void afterEach() throws Exception {
        if (this.mongod != null) {
            this.mongod.stop();
            this.mongodExe.stop();
        }
    }

    @Test
    public void shouldCreateNewObjectInEmbeddedMongoDb() {
        // given
        MongoDatabase db = mongo.getDatabase(DATABASE_NAME);
        db.createCollection("testCollection");
        MongoCollection<BasicDBObject> col = db.getCollection("testCollection", BasicDBObject.class);

        // when
        col.insertOne(new BasicDBObject("testDoc", new Date()));

        // then
        assertEquals(1L, col.countDocuments());
    }

}

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