rafa/test/unit/core/Stream-push.js

Rafa.js is a Javascript framework for building concurrent applications.

module.exports = (assert, Rafa) => {
  suite("push", () => {
    test("sync - all nodes return a message", function(done) {
      var messages = { _: [] };
      var handler = function(m) { 
        messages[this.name] = m.value;
        messages._.push(this.name);
        return new Rafa.Message(m.value+this.name); 
      };
      createTree(handler).push(
        createContext(messages, 'abdfegch', done),
        new Rafa.Message('x')
      );
    });

    /* a
     * c  b
     * h  e  d
     *    g  f
     */
    test("async - all nodes return a thenable", function(done) {
      var messages = { _: [] };
      var handler = function(m, c) { 
        messages[this.name] = m.value;
        messages._.push(this.name);
        return new Rafa.Message(Promise.resolve(m.value+this.name));
      };
      createTree(handler).push(
        createContext(messages, 'abcdehfg', done),
        new Rafa.Message(Promise.resolve('x'))
      );
    });
  });
  
  function createContext(messages, result, done) {
    return new Rafa.Context(() => {
      assert.equal(Object.keys(messages).length, 9);
      assert.equal(messages.a, 'x');
      assert.equal(messages.b, 'xa');
      assert.equal(messages.d, 'xab');
      assert.equal(messages.f, 'xabd');
      assert.equal(messages.e, 'xab');
      assert.equal(messages.g, 'xabe');
      assert.equal(messages.c, 'xa');
      assert.equal(messages.h, 'xac');
      assert.equal(messages._.join(''), result);
      done();
    });
  }

  function createTree(handler) {
    var a = createNamedStream('a', null, handler);
    var b = createNamedStream('b', a, handler);
    var c = createNamedStream('c', a, handler);
    var d = createNamedStream('d', b, handler);
    var e = createNamedStream('e', b, handler);
    var f = createNamedStream('f', d, handler);
    var g = createNamedStream('g', e, handler);
    var h = createNamedStream('h', c, handler);
    return a;
  }
  
  function createNamedStream(name, parent, handler) {
    var stream = new Rafa.Stream(parent, handler);
    stream.name = name;
    return stream;
  };
};