TypeScript service-config.service-config函數代碼示例

  before(async function setup() {
    cfg = sconfig(process.cwd() + '/test');
    const logger = new chassis.Logger(cfg.get('logger'));

    events = new Events(cfg.get('events:kafka'), logger);
    await events.start();

    const topics = cfg.get('events:kafka:topics');
    testTopic = events.topic(cfg.get('events:kafka:topics:test.resource:topic'));
    commandTopic = events.topic(cfg.get('events:kafka:topics:command:topic'));
    // subscribe all response events
    for (let eventName of cfg.get('events:kafka:topics:command:events')) {
      await commandTopic.on(eventName, eventListener);
    }

    server = new Server(cfg.get('server'), logger);
    db = await database.get(cfg.get('database:arango'), logger);
    await db.truncate();

    const config = cfg.get();
    delete config.database.nedb;  // not supported in default implementation

    const cis = new CommandInterface(server, config, logger, events);
    await server.bind('commandinterface', cis);
    await server.start();

    const client = new Client(cfg.get('client:commandinterface'), logger);
    service = await client.connect();
  });

 return new Promise((resolve, reject) => {
   readConfig(baseDir, logger, (err, cfg) => {
     if (err)
       reject(err);
     config = cfg;
     resolve(cfg);
   });
 });

 async function throwErrorOnMissingConfig() {
   await config.load(process.cwd() + '/test');
   cfg = await config.get();
   const logger = new Logger(cfg.get('logger'));
   cfg = sconfig(process.cwd() + '/test', logger);
   cfg.set('server:services', undefined);
   (() => {
     server = new Server(cfg.get('server'));
   }).should.throw('missing services configuration');
 });

describe('offsetStore', () => {
  let events: Events;
  const topicName = 'test';
  let topic: Topic;
  let offsetStore: OffsetStore;
  const eventName = 'testCreated';
  const testMessage = { value: 'testValue', count: 1 };

  const cfg = sconfig(process.cwd() + '/test');
  const logger = new Logger(cfg.get('logger'));

  beforeEach(async function start() {
    events = new Events(cfg.get('events:kafka'), logger);
    await events.start();
  });
  afterEach(async function stop() {
    await offsetStore.stop();
    await events.stop();
  });

  it('should emit an event and verify the stored offset value from redis',
    async function testStoredOffsetValue() {
      this.timeout(10000);
      offsetStore = new OffsetStore(events, cfg, logger);
      topic = await (events.topic(topicName));

      const listener = function listener(message, context) {
        testMessage.value.should.equal(message.value);
        testMessage.count.should.equal(message.count);
      };
      // get the current offsetValue for 'test' topic before emitting message
      const currentOffset = await topic.$offset(-1);
      // emit message to kafka
      await topic.on(eventName, listener);
      await topic.emit(eventName, testMessage);
      const newOffset = await new Promise((resolve, reject) => {
        setTimeout(async () => {
          const offsetValue = await offsetStore.getOffset(topicName);
          resolve(offsetValue);
        }, 8000);
      });
      should.exist(newOffset);
      Number(newOffset).should.equal(currentOffset + 1);
    });
  it('should consume a previously emitted message from Kafka',
    async function testConsumeListener() {
      this.timeout(4000);
      // emit testMessage to kafka
      topic = await events.topic(topicName);
      await topic.emit(eventName, testMessage);

      // start offsetTracker subscribing to previous offset value read
      // from redis and consume the above message
      offsetStore = new OffsetStore(events, cfg, logger);
      const listener = async function listener(message, context) {
        testMessage.value.should.equal(message.value);
        testMessage.count.should.equal(message.count);
      };

      // get the current offsetValue for 'test' topic before emitting message
      let startingOffset = await offsetStore.getOffset(topicName);
      await topic.on(eventName, listener, { startingOffset });

      // wait for 2sec so that message is consumed and
      // test is not ended immediately
      return new Promise((resolve, reject) => {
        setTimeout(() => {
          resolve();
        }, 2000);
      });
    });
});