michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  */
michael@0: "use strict";
michael@0: 
michael@0: const { dispatcher } = require("sdk/util/dispatcher");
michael@0: 
michael@0: exports["test dispatcher API"] = assert => {
michael@0:   const dispatch = dispatcher();
michael@0: 
michael@0:   assert.equal(typeof(dispatch), "function",
michael@0:                "dispatch is a function");
michael@0: 
michael@0:   assert.equal(typeof(dispatch.define), "function",
michael@0:                "dispatch.define is a function");
michael@0: 
michael@0:   assert.equal(typeof(dispatch.implement), "function",
michael@0:                "dispatch.implement is a function");
michael@0: 
michael@0:   assert.equal(typeof(dispatch.when), "function",
michael@0:                "dispatch.when is a function");
michael@0: };
michael@0: 
michael@0: exports["test dispatcher"] = assert => {
michael@0:   const isDuck = dispatcher();
michael@0: 
michael@0:   const quacks = x => x && typeof(x.quack) === "function";
michael@0: 
michael@0:   const Duck = function() {};
michael@0:   const Goose = function() {};
michael@0: 
michael@0:   const True = _ => true;
michael@0:   const False = _ => false;
michael@0: 
michael@0: 
michael@0: 
michael@0:   isDuck.define(Goose, False);
michael@0:   isDuck.define(Duck, True);
michael@0:   isDuck.when(quacks, True);
michael@0: 
michael@0:   assert.equal(isDuck(new Goose()), false,
michael@0:                "Goose ain't duck");
michael@0: 
michael@0:   assert.equal(isDuck(new Duck()), true,
michael@0:                "Ducks are ducks");
michael@0: 
michael@0:   assert.equal(isDuck({ quack: () => "Quaaaaaack!" }), true,
michael@0:                "It's a duck if it quacks");
michael@0: 
michael@0: 
michael@0:   assert.throws(() => isDuck({}), /Type does not implements method/, "not implemneted");
michael@0: 
michael@0:   isDuck.define(Object, False);
michael@0: 
michael@0:   assert.equal(isDuck({}), false,
michael@0:                "Ain't duck if it does not quacks!");
michael@0: };
michael@0: 
michael@0: exports["test redefining fails"] = assert => {
michael@0:   const isPM = dispatcher();
michael@0:   const isAfternoon = time => time.getHours() > 12;
michael@0: 
michael@0:   isPM.when(isAfternoon, _ => true);
michael@0: 
michael@0:   assert.equal(isPM(new Date(Date.parse("Jan 23, 1985, 13:20:00"))), true,
michael@0:                "yeap afternoon");
michael@0:   assert.equal(isPM({ getHours: _ => 17 }), true,
michael@0:                 "seems like afternoon");
michael@0: 
michael@0:   assert.throws(() => isPM.when(isAfternoon, x => x > 12 && x < 24),
michael@0:                 /Already implemented for the given predicate/,
michael@0:                "can't redefine on same predicate");
michael@0: 
michael@0: };
michael@0: 
michael@0: require("sdk/test").run(exports);