rafa/test/unit/core/Enumerator-empty.js

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

module.exports = (assert, Rafa) => {
  suite("empty", () => {
    test("emits a DoneMessage", () => {
      var message;
      var callback = m => message = m;
      Rafa.Enumerator.empty().next(callback);
      assert.ok(message.isDone);
      assert.isUndefined(message.value);
    });

    test("throws CompleteError when called more than once", () => {
      var it = Rafa.Enumerator.empty();
      var noop = it.noop;
      it.next(noop);
      assert.throws(() => it.next(noop), RangeError, "Enumerator is complete");
    });
  });
};