"use strict";

const expect = require("chai").expect;

const dm = require("../src");

let User = dm.createType("User", {
	name: dm.string(),
	messages: dm.setOf(dm.string()),
	addMessage: dm.guard([dm.string()], dm.nothing(), function (message) {
		this.messages.add(message);
		this.emit("message:added", message);
	})
});

describe("events", () => {
	it("should behave like an EventEmitter", () => {
		let joe = User({
			name: "Joe",
			messages: new Set()
		});

		let messageCounter = 0;

		joe.addListener("message:added", (message) => {
			messageCounter += 1;
		});

		joe.addMessage("Hello world!");

		expect(messageCounter).to.equal(1);

		joe.removeAllListeners("message:added");

		joe.addMessage("This should not fire a handler");

		expect(messageCounter).to.equal(1);
	});
});