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