chromium/src/third_party/blink/web_tests/external/wpt/webaudio/the-audio-api/the-audionode-interface/audionode-connect-method-chaining.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
     <title>
       audionode-connect-method-chaining.html
     </title>
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/webaudio/resources/audit-util.js"></script>
     <script src="/webaudio/resources/audit.js"></script>
   </head>
   <body>
     <script id="layout-test-code">
       // AudioNode dictionary with associated arguments.
       let nodeDictionary = [
         {name: 'Analyser'}, {name: 'BiquadFilter'}, {name: 'BufferSource'},
         {name: 'ChannelMerger', args: [6]},
         {name: 'ChannelSplitter', args: [6]}, {name: 'Convolver'},
         {name: 'Delay', args: []}, {name: 'DynamicsCompressor'}, {name: 'Gain'},
         {name: 'Oscillator'}, {name: 'Panner'},
         {name: 'ScriptProcessor', args: [512, 1, 1]}, {name: 'StereoPanner'},
         {name: 'WaveShaper'}
       ];


       function verifyReturnedNode(should, config) {
         should(
             config.destination === config.returned,
             'The return value of ' + config.desc + ' matches the destination ' +
                 config.returned.constructor.name)
             .beEqualTo(true);
       }

       // Test utility for batch method checking: in order to test 3 method
       // signatures, so we create 3 dummy destinations.
       // 1) .connect(GainNode)
       // 2) .connect(BiquadFilterNode, output)
       // 3) .connect(ChannelMergerNode, output, input)
       function testConnectMethod(context, should, options) {
         let source =
             context['create' + options.name].apply(context, options.args);
         let sourceName = source.constructor.name;

         let destination1 = context.createGain();
         verifyReturnedNode(should, {
           source: source,
           destination: destination1,
           returned: source.connect(destination1),
           desc: sourceName + '.connect(' + destination1.constructor.name + ')'
         });

         let destination2 = context.createBiquadFilter();
         verifyReturnedNode(should, {
           source: source,
           destination: destination2,
           returned: source.connect(destination2, 0),
           desc:
               sourceName + '.connect(' + destination2.constructor.name + ', 0)'
         });

         let destination3 = context.createChannelMerger();
         verifyReturnedNode(should, {
           source: source,
           destination: destination3,
           returned: source.connect(destination3, 0, 1),
           desc: sourceName + '.connect(' + destination3.constructor.name +
               ', 0, 1)'
         });
       }


       let audit = Audit.createTaskRunner();

       // Task: testing entries from the dictionary.
       audit.define('from-dictionary', (task, should) => {
         let context = new AudioContext();

         for (let i = 0; i < nodeDictionary.length; i++)
           testConnectMethod(context, should, nodeDictionary[i]);

         task.done();
       });

       // Task: testing Media* nodes.
       audit.define('media-group', (task, should) => {
         let context = new AudioContext();

         // Test MediaElementSourceNode needs an <audio> element.
         let mediaElement = document.createElement('audio');
         testConnectMethod(
             context, should,
             {name: 'MediaElementSource', args: [mediaElement]});

         // MediaStreamAudioDestinationNode has no output so it connect method
         // chaining isn't possible.

         // MediaStreamSourceNode requires 'stream' object to be constructed,
         // which is a part of MediaStreamDestinationNode.
         let streamDestination = context.createMediaStreamDestination();
         let stream = streamDestination.stream;
         testConnectMethod(
             context, should, {name: 'MediaStreamSource', args: [stream]});

         task.done();
       });

       // Task: test the exception thrown by invalid operation.
       audit.define('invalid-operation', (task, should) => {
         let contextA = new AudioContext();
         let contextB = new AudioContext();
         let gain1 = contextA.createGain();
         let gain2 = contextA.createGain();

         // Test if the first connection throws correctly. The first gain node
         // does not have the second output, so it should throw.
         should(function() {
           gain1.connect(gain2, 1).connect(contextA.destination);
         }, 'Connecting with an invalid output').throw(DOMException, 'IndexSizeError');

         // Test if the second connection throws correctly. The contextB's
         // destination is not compatible with the nodes from contextA, thus the
         // first connection succeeds but the second one should throw.
         should(
             function() {
               gain1.connect(gain2).connect(contextB.destination);
             },
             'Connecting to a node from the different context')
             .throw(DOMException, 'InvalidAccessError');

         task.done();
       });

       // Task: verify if the method chaining actually works.
       audit.define('verification', (task, should) => {
         // We pick the lowest sample rate allowed to run the test efficiently.
         let context = new OfflineAudioContext(1, 128, 8000);

         let constantBuffer = createConstantBuffer(context, 1, 1.0);

         let source = context.createBufferSource();
         source.buffer = constantBuffer;
         source.loop = true;

         let gain1 = context.createGain();
         gain1.gain.value = 0.5;
         let gain2 = context.createGain();
         gain2.gain.value = 0.25;

         source.connect(gain1).connect(gain2).connect(context.destination);
         source.start();

         context.startRendering()
             .then(function(buffer) {
               should(
                   buffer.getChannelData(0),
                   'The output of chained connection of gain nodes')
                   .beConstantValueOf(0.125);
             })
             .then(() => task.done());
       });

       audit.run();
     </script>
   </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>
	audionode-connect-method-chaining.html
	</title>
	<script src="/resources/testharness.js"></script>
	<script src="/resources/testharnessreport.js"></script>
	<script src="/webaudio/resources/audit-util.js"></script>
	<script src="/webaudio/resources/audit.js"></script>
	</head>
	<body>
	<script id="layout-test-code">
	// AudioNode dictionary with associated arguments.
	let nodeDictionary = [
	{name: 'Analyser'}, {name: 'BiquadFilter'}, {name: 'BufferSource'},
	{name: 'ChannelMerger', args: [6]},
	{name: 'ChannelSplitter', args: [6]}, {name: 'Convolver'},
	{name: 'Delay', args: []}, {name: 'DynamicsCompressor'}, {name: 'Gain'},
	{name: 'Oscillator'}, {name: 'Panner'},
	{name: 'ScriptProcessor', args: [512, 1, 1]}, {name: 'StereoPanner'},
	{name: 'WaveShaper'}
	];


	function verifyReturnedNode(should, config) {
	should(
	config.destination === config.returned,
	'The return value of ' + config.desc + ' matches the destination ' +
	config.returned.constructor.name)
	.beEqualTo(true);
	}

	// Test utility for batch method checking: in order to test 3 method
	// signatures, so we create 3 dummy destinations.
	// 1) .connect(GainNode)
	// 2) .connect(BiquadFilterNode, output)
	// 3) .connect(ChannelMergerNode, output, input)
	function testConnectMethod(context, should, options) {
	let source =
	context['create' + options.name].apply(context, options.args);
	let sourceName = source.constructor.name;

	let destination1 = context.createGain();
	verifyReturnedNode(should, {
	source: source,
	destination: destination1,
	returned: source.connect(destination1),
	desc: sourceName + '.connect(' + destination1.constructor.name + ')'
	});

	let destination2 = context.createBiquadFilter();
	verifyReturnedNode(should, {
	source: source,
	destination: destination2,
	returned: source.connect(destination2, 0),
	desc:
	sourceName + '.connect(' + destination2.constructor.name + ', 0)'
	});

	let destination3 = context.createChannelMerger();
	verifyReturnedNode(should, {
	source: source,
	destination: destination3,
	returned: source.connect(destination3, 0, 1),
	desc: sourceName + '.connect(' + destination3.constructor.name +
	', 0, 1)'
	});
	}


	let audit = Audit.createTaskRunner();

	// Task: testing entries from the dictionary.
	audit.define('from-dictionary', (task, should) => {
	let context = new AudioContext();

	for (let i = 0; i < nodeDictionary.length; i++)
	testConnectMethod(context, should, nodeDictionary[i]);

	task.done();
	});

	// Task: testing Media* nodes.
	audit.define('media-group', (task, should) => {
	let context = new AudioContext();

	// Test MediaElementSourceNode needs an <audio> element.
	let mediaElement = document.createElement('audio');
	testConnectMethod(
	context, should,
	{name: 'MediaElementSource', args: [mediaElement]});

	// MediaStreamAudioDestinationNode has no output so it connect method
	// chaining isn't possible.

	// MediaStreamSourceNode requires 'stream' object to be constructed,
	// which is a part of MediaStreamDestinationNode.
	let streamDestination = context.createMediaStreamDestination();
	let stream = streamDestination.stream;
	testConnectMethod(
	context, should, {name: 'MediaStreamSource', args: [stream]});

	task.done();
	});

	// Task: test the exception thrown by invalid operation.
	audit.define('invalid-operation', (task, should) => {
	let contextA = new AudioContext();
	let contextB = new AudioContext();
	let gain1 = contextA.createGain();
	let gain2 = contextA.createGain();

	// Test if the first connection throws correctly. The first gain node
	// does not have the second output, so it should throw.
	should(function() {
	gain1.connect(gain2, 1).connect(contextA.destination);
	}, 'Connecting with an invalid output').throw(DOMException, 'IndexSizeError');

	// Test if the second connection throws correctly. The contextB's
	// destination is not compatible with the nodes from contextA, thus the
	// first connection succeeds but the second one should throw.
	should(
	function() {
	gain1.connect(gain2).connect(contextB.destination);
	},
	'Connecting to a node from the different context')
	.throw(DOMException, 'InvalidAccessError');

	task.done();
	});

	// Task: verify if the method chaining actually works.
	audit.define('verification', (task, should) => {
	// We pick the lowest sample rate allowed to run the test efficiently.
	let context = new OfflineAudioContext(1, 128, 8000);

	let constantBuffer = createConstantBuffer(context, 1, 1.0);

	let source = context.createBufferSource();
	source.buffer = constantBuffer;
	source.loop = true;

	let gain1 = context.createGain();
	gain1.gain.value = 0.5;
	let gain2 = context.createGain();
	gain2.gain.value = 0.25;

	source.connect(gain1).connect(gain2).connect(context.destination);
	source.start();

	context.startRendering()
	.then(function(buffer) {
	should(
	buffer.getChannelData(0),
	'The output of chained connection of gain nodes')
	.beConstantValueOf(0.125);
	})
	.then(() => task.done());
	});

	audit.run();
	</script>
	</body>
	</html>