workforce/test/events.test.js

A cluster manager inspired by Learnboost's cluster.

var workforce = require('..');

describe('events', function(){
  var server;

  beforeEach(function(){
    server = workforce(__dirname + '/server')
      .set('workers', 2);
  });

  describe('worker', function(){
    it('should emit for each worker listening', function(done){
      var count = 0;

      server.on('worker', function(worker){
        worker.should.have.property('state', 'listening');
        count += 1;
      });

      server.listen(3000, function(){
        count.should.equal(2);
        server.exit();
        done();
      });
    });
  });

  describe('listening', function(){
    it('should emit after all workers are ready', function(done){
      var count = 0;

      server.on('worker', function(){
        count += 1;
      });

      server.on('listening', function(){
        count.should.equal(2);
      });

      server.listen(3000, function(){
        server.exit();
        done();
      });
    });
  });

  describe('worker exit', function(){
    it('should emit for each worker', function(done){
      var count = 0;

      server.on('worker exit', function(){
        count += 1;
      });

      server.listen(3000, function(){
        server.exit(function(){
          count.should.equal(2);
          done();
        });
      });
    });
  });

  describe('exit', function(){
    it('should emit after all workers have exited', function(){
      var count = 0;

      server.on('worker exit', function(){
        count += 1;
      });

      server.on('exit', function(){
        count.should.equal(2);
      });

      server.listen(3000, function(){
        server.exit();
      });
    });
  });

  describe('shutdown', function(){
    it('should emit after all workers have exited', function(){
      var count = 0;

      server.on('worker exit', function(){
        count += 1;
      });

      server.on('shutdown', function(){
        count.should.equal(2);
      });

      server.listen(3000, function(){
        server.shutdown();
      });
    });
  });

  describe('restart', function(){
    it('should emit after all workers have exited', function(){
      var exits = 0;
      var workers = 0;

      server.on('worker', function(){
        workers += 1;
      });

      server.on('worker exit', function(){
        exits += 1;
      });

      server.on('restart', function(){
        workers.should.equal(3);
        exits.should.equal(2);
        done();
        server.exit();
      });

      server.listen(3000, function(){
        server.restart();
      });
    });
  });

});