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

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

module.exports = (assert, Rafa) => {
  suite("group", () => {
    test("structure", () => {
      var stream = Rafa.stream();
      var parts = stream.group();
      assert.isNotNull(parts._);
      assert.isNotNull(parts._.destroy);
    });

    test("categories", () => {
      var stream = Rafa.stream();
      var parts = stream.group('a', 'b');
      var values = { 'a': [], 'b': [], '_': [] };
      parts.a.each(v => values.a.push(v));
      parts.b.each(v => values.b.push(v));
      parts._.each(v => values._.push(v));
      stream.push(Rafa.context(), Rafa.message('a'));
      stream.push(Rafa.context(), Rafa.message('b'));
      stream.push(Rafa.context(), Rafa.message('c'));
      stream.push(Rafa.context(), Rafa.message('a'));
      stream.push(Rafa.context(), Rafa.message('b'));
      stream.push(Rafa.context(), Rafa.message('d'));
      assert.equal(values.a.length, 2);
      assert.equal(values.b.length, 2);
      assert.equal(values._.length, 2);
      assert.equal(values.a[0], 'a');
      assert.equal(values.a[1], 'a');
      assert.equal(values.b[0], 'b');
      assert.equal(values.b[1], 'b');
      assert.equal(values._[0], 'c');
      assert.equal(values._[1], 'd');
    });

    test("starts with", () => {
      var stream = Rafa.stream();
      var values = { 'a': [], 'b': [], '_': [] };
      var parts = stream.group('a', 'b', v => v[0]);
      parts.a.each(v => values.a.push(v));
      parts.b.each(v => values.b.push(v));
      parts._.each(v => values._.push(v));
      stream.push(Rafa.context(), Rafa.message('amazing'));
      stream.push(Rafa.context(), Rafa.message('balloon'));
      stream.push(Rafa.context(), Rafa.message('time'));
      stream.push(Rafa.context(), Rafa.message('awesome'));
      stream.push(Rafa.context(), Rafa.message('battle'));
      stream.push(Rafa.context(), Rafa.message('drunk'));
      assert.equal(values.a.length, 2);
      assert.equal(values.b.length, 2);
      assert.equal(values._.length, 2);
      assert.equal(values.a[0], 'amazing');
      assert.equal(values.a[1], 'awesome');
      assert.equal(values.b[0], 'balloon');
      assert.equal(values.b[1], 'battle');
      assert.equal(values._[0], 'time');
      assert.equal(values._[1], 'drunk');
    });

    test("detach", () => {
      var stream = Rafa.stream();
      var parts = stream.group();
      var _ = parts._;
      var called = 0;
      parts._.each(v => called++);
      parts._.detach();
      stream.push(Rafa.context(), Rafa.message(1));
      assert.isNull(parts._);
      assert.equal(called, 0);
    });
  });
};