mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 16:48:00 +00:00
332 lines
8.6 KiB
JavaScript
332 lines
8.6 KiB
JavaScript
define(["helper/Basic", "Tone/event/Loop", "Tone/core/Tone", "Tone/core/Transport", "helper/Offline", "helper/Test", "Tone/type/Time"],
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function(Basic, Loop, Tone, Transport, Offline, Test, Time){
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describe("Loop", function(){
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Basic(Loop);
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context("Constructor", function(){
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it("takes a callback and an interval", function(){
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return Offline(function(){
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var callback = function(){};
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var loop = new Loop(callback, "8n");
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expect(loop.callback).to.equal(callback);
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expect(loop.interval.valueOf()).to.equal(Time("8n").valueOf());
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loop.dispose();
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});
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});
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it("can be constructed with no arguments", function(){
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return Offline(function(){
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var loop = new Loop();
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expect(loop.iterations).to.equal(Infinity);
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loop.dispose();
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});
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});
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it("can pass in arguments in options object", function(){
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return Offline(function(){
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var callback = function(){};
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var loop = new Loop({
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"callback" : callback,
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"iterations" : 4,
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"probability" : 0.3,
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"interval" : "8t"
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});
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expect(loop.callback).to.equal(callback);
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expect(loop.interval.valueOf()).to.equal(Time("8t").valueOf());
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expect(loop.iterations).to.equal(4);
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expect(loop.probability).to.equal(0.3);
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loop.dispose();
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});
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});
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});
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context("Get/Set", function(){
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it("can set values with object", function(){
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return Offline(function(){
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var callback = function(){};
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var loop = new Loop();
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loop.set({
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"callback" : callback,
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"iterations" : 8
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});
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expect(loop.callback).to.equal(callback);
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expect(loop.iterations).to.equal(8);
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loop.dispose();
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});
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});
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it("can get/set the humanize values", function(){
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return Offline(function(){
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var callback = function(){};
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var loop = new Loop();
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loop.humanize = true;
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expect(loop.humanize).to.be.true;
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loop.dispose();
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});
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});
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it("can set get a the values as an object", function(){
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return Offline(function(){
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var callback = function(){};
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var loop = new Loop({
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"callback" : callback,
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"iterations" : 4,
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"probability" : 0.3
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});
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var values = loop.get();
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expect(values.iterations).to.equal(4);
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expect(values.probability).to.equal(0.3);
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loop.dispose();
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});
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});
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});
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context("Callback", function(){
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it("does not invoke get invoked until started", function(){
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return Offline(function(Transport){
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new Loop(function(){
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throw new Error("shouldn't call this callback");
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}, "8n");
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Transport.start();
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}, 0.3);
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});
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it("is invoked after it's started", function(){
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var invoked = false;
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return Offline(function(Transport){
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var loop = new Loop(function(){
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loop.dispose();
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invoked = true;
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}, 0.05).start(0);
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Transport.start();
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}).then(function(){
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expect(invoked).to.be.true;
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});
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});
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it("passes in the scheduled time to the callback", function(){
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var invoked = false;
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return Offline(function(Transport){
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var now = Transport.now() + 0.1;
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var loop = new Loop(function(time){
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expect(time).to.be.a.number;
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expect(time - now).to.be.closeTo(0.3, 0.01);
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loop.dispose();
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invoked = true;
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});
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Transport.start(now);
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loop.start(0.3);
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}, 0.5).then(function(){
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expect(invoked).to.be.true;
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});
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});
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it("can mute the callback", function(){
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return Offline(function(){
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var loop = new Loop(function(){
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throw new Error("shouldn't call this callback");
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}, "4n").start();
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loop.mute = true;
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expect(loop.mute).to.be.true;
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Transport.start();
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}, 0.4);
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});
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it("can trigger with some probability", function(){
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return Offline(function(Transport){
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var loop = new Loop(function(){
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throw new Error("shouldn't call this callback");
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}, "4n").start();
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loop.probability = 0;
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expect(loop.probability).to.equal(0);
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Transport.start();
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}, 0.4);
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});
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});
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context("Scheduling", function(){
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it("can be started and stopped multiple times", function(){
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return Offline(function(Transport){
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var loop = new Loop().start().stop(0.2).start(0.4);
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Transport.start(0);
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return function(time){
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Test.whenBetween(time, 0, 0.19, function(){
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expect(loop.state).to.equal("started");
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});
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Test.whenBetween(time, 0.2, 0.39, function(){
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expect(loop.state).to.equal("stopped");
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});
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Test.whenBetween(time, 0.4, Infinity, function(){
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expect(loop.state).to.equal("started");
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});
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};
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}, 0.6);
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});
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it("restarts when transport is restarted", function(){
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return Offline(function(Transport){
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var note = new Loop().start(0).stop(0.4);
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Transport.start(0).stop(0.5).start(0.55);
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return function(sample, time){
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Test.whenBetween(time, 0, 0.39, function(){
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expect(note.state).to.equal("started");
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});
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Test.whenBetween(time, 0.4, 0.5, function(){
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expect(note.state).to.equal("stopped");
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});
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Test.whenBetween(time, 0.55, 0.8, function(){
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expect(note.state).to.equal("started");
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});
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};
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}, 1);
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});
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it("can be cancelled", function(){
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return Offline(function(Transport){
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var note = new Loop().start(0);
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expect(note.state).to.equal("started");
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Transport.start();
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var firstStop = false;
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var restarted = false;
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var tested = false;
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return function(time){
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//stop the transport
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if (time > 0.2 && !firstStop){
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firstStop = true;
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Transport.stop();
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note.cancel();
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}
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if (time > 0.3 && !restarted){
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restarted = true;
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Transport.start();
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}
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if (time > 0.4 && !tested){
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restarted = true;
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Transport.start();
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expect(note.state).to.equal("stopped");
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}
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};
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}, 0.5);
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});
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});
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context("Looping", function(){
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it("loops", function(){
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var callCount = 0;
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return Offline(function(Transport){
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new Loop({
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"interval" : 0.1,
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"callback" : function(){
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callCount++;
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}
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}).start(0);
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Transport.start();
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}, 0.8).then(function(){
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expect(callCount).to.equal(9);
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});
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});
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it("loops for the specified interval", function(){
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var invoked = false;
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return Offline(function(Transport){
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var lastCall;
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new Loop({
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"interval" : "8n",
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"callback" : function(time){
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if (lastCall){
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invoked = true;
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expect(time - lastCall).to.be.closeTo(0.25, 0.01);
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}
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lastCall = time;
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}
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}).start(0);
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Transport.start();
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}, 1).then(function(){
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expect(invoked).to.be.true;
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});
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});
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it("can loop a specific number of iterations", function(){
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var callCount = 0;
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return Offline(function(Transport){
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new Loop({
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"interval" : 0.1,
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"iterations" : 2,
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"callback" : function(){
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callCount++;
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}
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}).start(0);
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Transport.start();
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}, 0.4).then(function(){
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expect(callCount).to.equal(2);
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});
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});
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it("reports the progress of the loop", function(){
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return Offline(function(Transport){
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var loop = new Loop({
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"interval" : 1,
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}).start(0);
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Transport.start();
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return function(time){
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expect(loop.progress).to.be.closeTo(time, 0.05);
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};
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}, 0.8);
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});
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});
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context("playbackRate", function(){
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it("can adjust the playbackRate", function(){
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var invoked = false;
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return Offline(function(Transport){
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var lastCall;
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var loop = new Loop({
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"playbackRate" : 2,
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"interval" : 0.5,
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"callback" : function(time){
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if (lastCall){
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invoked = true;
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expect(time - lastCall).to.be.closeTo(0.25, 0.01);
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}
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lastCall = time;
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}
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}).start(0);
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expect(loop.playbackRate).to.equal(2);
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Transport.start();
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}, 0.7).then(function(){
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expect(invoked).to.be.true;
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});
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});
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it("can playback at a faster rate", function(){
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var callCount = 0;
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return Offline(function(Transport){
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var loop = new Loop({
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"interval" : 0.1,
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"callback" : function(){
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callCount++;
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}
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}).start(0);
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loop.playbackRate = 1.5;
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expect(loop.playbackRate).to.equal(1.5);
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Transport.start();
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}, 0.8).then(function(){
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expect(callCount).to.equal(13);
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});
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});
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});
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});
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});
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