let server;

describe('Node.js Unified Logging', function() {
  describe('Middleware With Async Hooks', function() {
    before(function(done) {
      // start server
      server = app.listen(3000, () => {
        console.log('listening on port 3000');
      });
      // make a request
      request('http://localhost:3000/home', function (error, response, body) {
        done();
      });
    });
    after(function() {
      // close server when done
      server.close();
    });
    it('makes logs', function() {
      return logArray.should.not.be.empty;
    });
    let objs = [];
    it('makes logs that contain JSON', function() {
      logArray.forEach((entry) => {
        let bracketIdx = entry.indexOf('{');
        let jsonStr = entry.substr(bracketIdx);
        let obj = JSON.parse(jsonStr);
        objs.push(obj);
      });
      return objs.should.not.be.empty;
    });
    it('makes logs that all have a span id', function() {
      return objs.should.all.have.property('ul-span-id');
    });
    it('makes logs with matching head spans', function() {
      const headSpanId = objs[0]['ul-ctx-head-span-id'];
      return objs.should.all.have.property('ul-ctx-head-span-id', headSpanId);
    });
    it('makes logs with matching caller spans', function() {
      const callerSpanId = objs[0]['ul-ctx-caller-span-id'];
      return objs.should.all.have.property('ul-ctx-caller-span-id', callerSpanId);
    });
    it('makes logs that all have an operation name', function() {
      return objs.should.all.have.property('ul-operation');
    });
    let homeLog;
    let asyncLog;
    let dbLog;
    it('makes one log for the home operation', function() {
      objs.forEach((log) => {
        if (log['ul-operation'] === 'GET /home') {
          homeLog = log;
        } else if (log['ul-operation'] === 'GET /async') {
          asyncLog = log;
        } else if (log['ul-operation'] === 'GET /db') {
          dbLog = log;
        }
      });
      return homeLog.should.exist;
    });
    it('makes one log for the async operation', function() {
      return asyncLog.should.exist;
    });
    it('makes one log for the db operation', function() {
      return dbLog.should.exist;
    });
    it('logs the async span as a child of the home span', function() {
      return homeLog['ul-span-id'].should.equal(asyncLog['ul-child-of']);
    });
    it('logs the db span as a child of the async span', function() {
      return asyncLog['ul-span-id'].should.equal(dbLog['ul-child-of']);
    });
  });
});