third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html - chromium/src - Git at Google

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
 <script src="resources/compatibility.js"></script>
 <script src="resources/audio-testing.js"></script>
 <script src="../resources/js-test.js"></script>
 <script src="resources/biquad-testing.js"></script>
 </head>

 <body>

 <div id="description"></div>
 <div id="console"></div>
 <script>
 description("Tests DOM exception messages");

 var context;
 var otherContext;
 var node;
 var node2;
 var mode;
 var panner;
 var script;

 function shouldThrowAndBeUnchanged(attr, value) {
     shouldThrow(attr + " = " + value);
     shouldNotBe(attr, value);
 }

 function runTest() {
     if (window.testRunner) {
         testRunner.dumpAsText();
     }

     context = new AudioContext();
     otherContext = new AudioContext();

     // Test creation of various objects

     // Invalid number of channels: NotSupportedError
     shouldThrow("context.createBuffer(99, 1, context.sampleRate)");
     shouldThrow("context.createBuffer(0, 1, context.sampleRate)");
     // Invalid sample rate: NotSupportedError
     shouldThrow("context.createBuffer(1, 1, 1)");
     shouldThrow("context.createBuffer(1, 1, 1e6)");
     // Check valid values from crbug.com/344375
     shouldNotThrow("context.createBuffer(1, 1, 3000)");
     shouldNotThrow("context.createBuffer(1, 1, 192000)");
     // Invalid number of frames: NotSupportedError
     shouldThrow("context.createBuffer(1, 0, context.sampleRate)");
     // 2-arg createBuffer not allowed.
     shouldThrow("context.createBuffer(new ArrayBuffer(100), true)");
     // Invalid ArrayBuffer (unspecified error)
     shouldThrow("context.decodeAudioData(null, function() {}, function () {})");
     // Invalid sources (unspecified error)
     shouldThrow("context.createMediaElementSource(null)");
     shouldThrow("context.createMediaStreamSource(null)");
     // Invalid buffer size: IndexSizeError
     shouldThrow("context.createScriptProcessor(1, 1, 1)");
     // Invalid number of inputs and outputs: IndexSizeError
     shouldThrow("context.createScriptProcessor(4096, 100, 1)");
     shouldThrow("context.createScriptProcessor(4096, 1, 100)");
     shouldNotThrow("context.createScriptProcessor()");
     shouldNotThrow("context.createScriptProcessor(0)");

     // Invalid number of channels: IndexSizeError
     shouldThrow("context.createChannelSplitter(0)");
     shouldThrow("context.createChannelSplitter(99)");
     shouldThrow("context.createChannelMerger(0)");
     shouldThrow("context.createChannelMerger(99)");
     // Invalid real/imag arrays: IndexSizeError
     shouldThrow("context.createPeriodicWave(null, null)");
     shouldThrow("context.createPeriodicWave(new Float32Array(10), null)");
     // Real array is too long.
     shouldThrow("context.createPeriodicWave(new Float32Array(4100), new Float32Array(4100))");
     // Imaginary array is too long.
     shouldThrow("context.createPeriodicWave(new Float32Array(100), new Float32Array(4100))");
     // Real and imaginary arrays must have the same size: IndexSizeError
     shouldThrow("context.createPeriodicWave(new Float32Array(10), new Float32Array(7))");
     // Check upper limit is correct.
     shouldNotThrow("context.createPeriodicWave(new Float32Array(2048), new Float32Array(2048))");
     shouldThrow("context.createPeriodicWave(new Float32Array(2049), new Float32Array(2049))");


     // Analysers
     node = context.createAnalyser();
     // Invalid fftSize: IndexSizeError
     shouldThrowAndBeUnchanged("node.fftSize", "42");
     shouldThrowAndBeUnchanged("node.fftSize", "16");
     shouldNotThrow("node.fftSize = 32768");
     shouldThrowAndBeUnchanged("node.fftSize", "65536");

     shouldThrowAndBeUnchanged("node.minDecibels", "-10");
     shouldThrowAndBeUnchanged("node.maxDecibels", "-150");
     shouldThrowAndBeUnchanged("node.minDecibels", "-30");
     shouldThrowAndBeUnchanged("node.maxDecibels", "-100");

     shouldThrowAndBeUnchanged("node.smoothingTimeConstant", "-0.1");
     shouldThrowAndBeUnchanged("node.smoothingTimeConstant", "1.5");

     // AudioBuffers
     node = context.createBuffer(1,1, context.sampleRate);
     // Invalid channel index: IndexSizeError
     shouldThrow("node.getChannelData(2)");

     // AudioNode connections
     node = context.createGain();
     node2 = context.createGain();
     // Invalid destination node (unspecified error)
     shouldThrow("node.connect(null, 0, 0)");
     // Invalid input or output index: IndexSizeError
     shouldThrow("node.connect(context.destination, 100, 0)");
     shouldThrow("node.connect(context.destination, 0, 100)");
     shouldThrow("node.connect(node2.gain, 100)");
     shouldThrow("node.disconnect(99)");
     // Can't connect to a different context (unspecified error)
     shouldThrow("node.connect(otherContext.destination)");

     // Invalid channel count: NotSupportedError
     shouldThrowAndBeUnchanged("node.channelCount", "99");
     // Invalid mode or interpretation (unspecified error)
     currentMode = node.channelCountMode;
     currentInterpretation = node.channelInterpretation;
     shouldNotThrow("node.channelCountMode = 'fancy'");
     if (node.channelCountMode == currentMode)
       testPassed("Invalid channelCountMode value did not change mode");
     else
       testFailed("node.channelCountMode incorrectly changed to invalid value " + node.channelCountMode);
     shouldNotThrow("node.channelInterpretation = mode");
     if (node.channelInterpretation == currentInterpretation)
       testPassed("Invalid channelInterpration value did not change mode");
     else
       testFailed("node.channelInterpretation incorrectly changed to invalid value " + node.channelInterpreation);

     // Destination node channel count: should throw IndexSizeError on invalid
     // channel count. shouldNotThrow() method cannot be used because the error
     // message includes the number of channels, which can change depending on
     // the actual attached hardware.
     try {
         eval("context.destination.channelCount = 99");
     } catch (e) {
         if (e.message === "Failed to set the 'channelCount' property on 'AudioNode': The channel count provided (99) is outside the range [1, " + context.destination.maxChannelCount + "]." && e.name === "IndexSizeError")
             testPassed("context.destination.channelCount = 99 threw IndexSizeError exception on invalid channel count.");
         else
             testFailed("context.destination.channelCount = 99 should throw IndexSizeError exception on invalid channel count.");
     }

     // Delay nodes are tested elsewhere, so don't duplicate that work here.

     // OfflineAudioContext
     // Max supported channels
     shouldNotThrow("new OfflineAudioContext(32, 100, context.sampleRate)");
     // Invalid number of channels (unspecified error)
     shouldThrow("new OfflineAudioContext(99, 100, context.sampleRate)");
     // Invalid sample rate. (unspecified error)
     shouldThrow("new OfflineAudioContext(1, 100, 1)");
     shouldThrow("new OfflineAudioContext(1, 100, 1e6)");
     // Invalid frame length (crbug.com/351277)
     shouldThrow("new OfflineAudioContext(1, -88200000000000, 44100)");

     // WaveShaper types
     node = context.createWaveShaper();
     currentOversample = node.oversample;
     shouldNotThrow("node.oversample = '9x'");
     if (node.oversample == currentOversample)
       testPassed("Invalid oversample value did not change node.oversample");
     else
       testFailed("node.oversample incorrectly changed to invalid value " + node.oversample);
     shouldThrow("node.curve = new Float32Array(1)");
     shouldBeNull("node.curve");
     shouldNotThrow("node.curve = new Float32Array(2)");
     shouldNotThrow("node.curve = null");

     // Start/stop for AudioBufferSourceNodes
     buffer = context.createBuffer(1,1, context.sampleRate);
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     // Setting the buffer twice will eventually throw an error, but for now, it's just a deprecation
     // warning.
     shouldNotThrow("source.buffer = context.createBuffer(1, 10, context.sampleRate)");
     shouldThrow("source.start(-1)");
     shouldThrow("source.start(Infinity)");
     shouldThrow("source.start(-Infinity)");
     shouldThrow("source.start(NaN)");
     shouldThrow("source.start(1, Infinity)");
     shouldThrow("source.start(1, -Infinity)");
     shouldThrow("source.start(1, NaN)");
     shouldThrow("source.start(1, -1)");
     shouldThrow("source.start(1, -Number.MIN_VALUE)");
     shouldThrow("source.start(1, 1, Infinity)");
     shouldThrow("source.start(1, 1, -Infinity)");
     shouldThrow("source.start(1, 1, NaN)");
     shouldThrow("source.start(1, 1, -1)");
     shouldThrow("source.start(1, 1, -Number.MIN_VALUE)");
     shouldNotThrow("source.start()");
     shouldThrow("source.stop(-Number.MIN_VALUE)");
     shouldThrow("source.stop(Infinity)");
     shouldThrow("source.stop(-Infinity)");
     shouldThrow("source.stop(NaN)");
     shouldNotThrow("source.stop()");

     // Verify that start(0, 0) doesn't signal.
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     shouldNotThrow("source.start(0, 0)");

     // Verify that start(0, -0.0) doesn't signal.
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     shouldNotThrow("source.start(0, -1/Infinity)");

     // It's not clear from the spec, but I think it's valid to call start(). The spec is silent on
     // what happens if we call stop() afterwards, so don't call it.
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.start()");

     buffer = context.createBuffer(1,1, context.sampleRate);
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     shouldThrow("source.stop()");

     buffer = context.createBuffer(1,1, context.sampleRate);
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     shouldNotThrow("source.start()");
     shouldThrow("source.start()");

     buffer = context.createBuffer(1,1, context.sampleRate);
     shouldNotThrow("source = context.createBufferSource()");
     shouldNotThrow("source.buffer = buffer");
     shouldNotThrow("source.start()");
     shouldNotThrow("source.stop()");


     // Start/stop for OscillatorNodes
     shouldNotThrow("source = context.createOscillator()");
     shouldThrow("source.start(-Number.MIN_VALUE)");
     shouldThrow("source.start(Infinity)");
     shouldThrow("source.start(-Infinity)");
     shouldThrow("source.start(NaN)");
     shouldNotThrow("source.start()");
     shouldThrow("source.stop(-Number.MIN_VALUE)");
     shouldThrow("source.stop(Infinity)");
     shouldThrow("source.stop(-Infinity)");
     shouldThrow("source.stop(NaN)");
     shouldNotThrow("source.stop()");

     shouldNotThrow("osc = context.createOscillator()");
     shouldThrow("osc.stop()");
     shouldNotThrow("osc1 = context.createOscillator()");
     shouldNotThrow("osc1.start()");
     shouldNotThrow("osc1.stop()");

     // exponentialRampToValue should throw on non-positive target values.
     node = context.createGain();
     node.connect(context.destination);
     shouldThrow("node.gain.exponentialRampToValueAtTime(-1, 0.1)");
     shouldThrow("node.gain.exponentialRampToValueAtTime(0, 0.1)");
     // See crbug.com/459391.
     // Math.pow(2, -149) = 1.401298464324817e-45 is the double-float value of the
     // least positive single float number. We do it this way to make sure no round-off or conversion
     // errors happen when reading 1.401298464324817e-45.
     shouldNotThrow("node.gain.exponentialRampToValueAtTime(Math.pow(2, -149), 0.1)");
     // Math.pow(2, -150) = 7.006492321624085d-46 is the largest double float value such that
     // conversion to a float produces 0.  Any larger value would produce a non-zero value when
     // converted to a single float.
     shouldThrow("node.gain.exponentialRampToValueAtTime(Math.pow(2, -150), 0.1)");

     // Convolver buffer rate must match context rate. Create on offline context so we
     // specify the context rate exactly, in case the test is run on platforms with different
     // HW sample rates.
     shouldNotThrow("oc = new OfflineAudioContext(1, 44100, 44100)");
     shouldNotThrow("conv = oc.createConvolver()");
     shouldThrow("conv.buffer = oc.createBuffer(1, 100, 22050)");
     // conv.buffer should be unchanged (null) because the above failed.
     shouldBeNull("conv.buffer");

     // PannerNode channel count and mode
     panner = context.createPanner();
     // Channel count can only be set to 1 or 2.
     shouldNotThrow("panner.channelCount = 1");
     shouldNotThrow("panner.channelCount = 2");
     shouldThrowAndBeUnchanged("panner.channelCount", "0");
     shouldThrowAndBeUnchanged("panner.channelCount", "3");
     // It is illegal to set the mode to 'max'
     shouldThrowAndBeUnchanged("panner.channelCountMode", "'max'");
     shouldNotThrow("panner.channelCountMode = 'explicit'");
     shouldNotThrow("panner.channelCountMode = 'clamped-max'");
     shouldNotThrow("panner.channelCountMode = 'junk'");

     // Test channel count and mode for a ScriptProcessor.
     shouldNotThrow("script = context.createScriptProcessor(256, 3)");
     // Make sure the channelCount and mode are set correctly.
     shouldBeEqualToNumber("script.channelCount", 3);
     shouldBeEqualToString("script.channelCountMode", "explicit");
     // Cannot change the channelCount or mode to anything else
     shouldNotThrow("script.channelCount = 3");
     shouldThrowAndBeUnchanged("script.channelCount", "1");

     shouldThrowAndBeUnchanged("script.channelCount", "7");
     shouldNotThrow("script.channelCountMode = 'explicit'");
     shouldThrowAndBeUnchanged("script.channelCountMode", "'max'");
     shouldThrowAndBeUnchanged("script.channelCountMode", "'clamped-max'");
     shouldNotThrow("script.channelCountMode = 'junk'");

     // noteOn and noteOff don't exist anymore
     shouldBeUndefined("osc.noteOn");
     shouldBeUndefined("osc.noteOff");
     shouldBeUndefined("source.noteOn");
     shouldBeUndefined("source.noteOff");
 }

 runTest();
 successfullyParsed = true;

 </script>
 </body>
 </html>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
	<html>
	<head>
	<script src="resources/compatibility.js"></script>
	<script src="resources/audio-testing.js"></script>
	<script src="../resources/js-test.js"></script>
	<script src="resources/biquad-testing.js"></script>
	</head>

	<body>

	<div id="description"></div>
	<div id="console"></div>
	<script>
	description("Tests DOM exception messages");

	var context;
	var otherContext;
	var node;
	var node2;
	var mode;
	var panner;
	var script;

	function shouldThrowAndBeUnchanged(attr, value) {
	shouldThrow(attr + " = " + value);
	shouldNotBe(attr, value);
	}

	function runTest() {
	if (window.testRunner) {
	testRunner.dumpAsText();
	}

	context = new AudioContext();
	otherContext = new AudioContext();

	// Test creation of various objects

	// Invalid number of channels: NotSupportedError
	shouldThrow("context.createBuffer(99, 1, context.sampleRate)");
	shouldThrow("context.createBuffer(0, 1, context.sampleRate)");
	// Invalid sample rate: NotSupportedError
	shouldThrow("context.createBuffer(1, 1, 1)");
	shouldThrow("context.createBuffer(1, 1, 1e6)");
	// Check valid values from crbug.com/344375
	shouldNotThrow("context.createBuffer(1, 1, 3000)");
	shouldNotThrow("context.createBuffer(1, 1, 192000)");
	// Invalid number of frames: NotSupportedError
	shouldThrow("context.createBuffer(1, 0, context.sampleRate)");
	// 2-arg createBuffer not allowed.
	shouldThrow("context.createBuffer(new ArrayBuffer(100), true)");
	// Invalid ArrayBuffer (unspecified error)
	shouldThrow("context.decodeAudioData(null, function() {}, function () {})");
	// Invalid sources (unspecified error)
	shouldThrow("context.createMediaElementSource(null)");
	shouldThrow("context.createMediaStreamSource(null)");
	// Invalid buffer size: IndexSizeError
	shouldThrow("context.createScriptProcessor(1, 1, 1)");
	// Invalid number of inputs and outputs: IndexSizeError
	shouldThrow("context.createScriptProcessor(4096, 100, 1)");
	shouldThrow("context.createScriptProcessor(4096, 1, 100)");
	shouldNotThrow("context.createScriptProcessor()");
	shouldNotThrow("context.createScriptProcessor(0)");

	// Invalid number of channels: IndexSizeError
	shouldThrow("context.createChannelSplitter(0)");
	shouldThrow("context.createChannelSplitter(99)");
	shouldThrow("context.createChannelMerger(0)");
	shouldThrow("context.createChannelMerger(99)");
	// Invalid real/imag arrays: IndexSizeError
	shouldThrow("context.createPeriodicWave(null, null)");
	shouldThrow("context.createPeriodicWave(new Float32Array(10), null)");
	// Real array is too long.
	shouldThrow("context.createPeriodicWave(new Float32Array(4100), new Float32Array(4100))");
	// Imaginary array is too long.
	shouldThrow("context.createPeriodicWave(new Float32Array(100), new Float32Array(4100))");
	// Real and imaginary arrays must have the same size: IndexSizeError
	shouldThrow("context.createPeriodicWave(new Float32Array(10), new Float32Array(7))");
	// Check upper limit is correct.
	shouldNotThrow("context.createPeriodicWave(new Float32Array(2048), new Float32Array(2048))");
	shouldThrow("context.createPeriodicWave(new Float32Array(2049), new Float32Array(2049))");


	// Analysers
	node = context.createAnalyser();
	// Invalid fftSize: IndexSizeError
	shouldThrowAndBeUnchanged("node.fftSize", "42");
	shouldThrowAndBeUnchanged("node.fftSize", "16");
	shouldNotThrow("node.fftSize = 32768");
	shouldThrowAndBeUnchanged("node.fftSize", "65536");

	shouldThrowAndBeUnchanged("node.minDecibels", "-10");
	shouldThrowAndBeUnchanged("node.maxDecibels", "-150");
	shouldThrowAndBeUnchanged("node.minDecibels", "-30");
	shouldThrowAndBeUnchanged("node.maxDecibels", "-100");

	shouldThrowAndBeUnchanged("node.smoothingTimeConstant", "-0.1");
	shouldThrowAndBeUnchanged("node.smoothingTimeConstant", "1.5");

	// AudioBuffers
	node = context.createBuffer(1,1, context.sampleRate);
	// Invalid channel index: IndexSizeError
	shouldThrow("node.getChannelData(2)");

	// AudioNode connections
	node = context.createGain();
	node2 = context.createGain();
	// Invalid destination node (unspecified error)
	shouldThrow("node.connect(null, 0, 0)");
	// Invalid input or output index: IndexSizeError
	shouldThrow("node.connect(context.destination, 100, 0)");
	shouldThrow("node.connect(context.destination, 0, 100)");
	shouldThrow("node.connect(node2.gain, 100)");
	shouldThrow("node.disconnect(99)");
	// Can't connect to a different context (unspecified error)
	shouldThrow("node.connect(otherContext.destination)");

	// Invalid channel count: NotSupportedError
	shouldThrowAndBeUnchanged("node.channelCount", "99");
	// Invalid mode or interpretation (unspecified error)
	currentMode = node.channelCountMode;
	currentInterpretation = node.channelInterpretation;
	shouldNotThrow("node.channelCountMode = 'fancy'");
	if (node.channelCountMode == currentMode)
	testPassed("Invalid channelCountMode value did not change mode");
	else
	testFailed("node.channelCountMode incorrectly changed to invalid value " + node.channelCountMode);
	shouldNotThrow("node.channelInterpretation = mode");
	if (node.channelInterpretation == currentInterpretation)
	testPassed("Invalid channelInterpration value did not change mode");
	else
	testFailed("node.channelInterpretation incorrectly changed to invalid value " + node.channelInterpreation);

	// Destination node channel count: should throw IndexSizeError on invalid
	// channel count. shouldNotThrow() method cannot be used because the error
	// message includes the number of channels, which can change depending on
	// the actual attached hardware.
	try {
	eval("context.destination.channelCount = 99");
	} catch (e) {
	if (e.message === "Failed to set the 'channelCount' property on 'AudioNode': The channel count provided (99) is outside the range [1, " + context.destination.maxChannelCount + "]." && e.name === "IndexSizeError")
	testPassed("context.destination.channelCount = 99 threw IndexSizeError exception on invalid channel count.");
	else
	testFailed("context.destination.channelCount = 99 should throw IndexSizeError exception on invalid channel count.");
	}

	// Delay nodes are tested elsewhere, so don't duplicate that work here.

	// OfflineAudioContext
	// Max supported channels
	shouldNotThrow("new OfflineAudioContext(32, 100, context.sampleRate)");
	// Invalid number of channels (unspecified error)
	shouldThrow("new OfflineAudioContext(99, 100, context.sampleRate)");
	// Invalid sample rate. (unspecified error)
	shouldThrow("new OfflineAudioContext(1, 100, 1)");
	shouldThrow("new OfflineAudioContext(1, 100, 1e6)");
	// Invalid frame length (crbug.com/351277)
	shouldThrow("new OfflineAudioContext(1, -88200000000000, 44100)");

	// WaveShaper types
	node = context.createWaveShaper();
	currentOversample = node.oversample;
	shouldNotThrow("node.oversample = '9x'");
	if (node.oversample == currentOversample)
	testPassed("Invalid oversample value did not change node.oversample");
	else
	testFailed("node.oversample incorrectly changed to invalid value " + node.oversample);
	shouldThrow("node.curve = new Float32Array(1)");
	shouldBeNull("node.curve");
	shouldNotThrow("node.curve = new Float32Array(2)");
	shouldNotThrow("node.curve = null");

	// Start/stop for AudioBufferSourceNodes
	buffer = context.createBuffer(1,1, context.sampleRate);
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	// Setting the buffer twice will eventually throw an error, but for now, it's just a deprecation
	// warning.
	shouldNotThrow("source.buffer = context.createBuffer(1, 10, context.sampleRate)");
	shouldThrow("source.start(-1)");
	shouldThrow("source.start(Infinity)");
	shouldThrow("source.start(-Infinity)");
	shouldThrow("source.start(NaN)");
	shouldThrow("source.start(1, Infinity)");
	shouldThrow("source.start(1, -Infinity)");
	shouldThrow("source.start(1, NaN)");
	shouldThrow("source.start(1, -1)");
	shouldThrow("source.start(1, -Number.MIN_VALUE)");
	shouldThrow("source.start(1, 1, Infinity)");
	shouldThrow("source.start(1, 1, -Infinity)");
	shouldThrow("source.start(1, 1, NaN)");
	shouldThrow("source.start(1, 1, -1)");
	shouldThrow("source.start(1, 1, -Number.MIN_VALUE)");
	shouldNotThrow("source.start()");
	shouldThrow("source.stop(-Number.MIN_VALUE)");
	shouldThrow("source.stop(Infinity)");
	shouldThrow("source.stop(-Infinity)");
	shouldThrow("source.stop(NaN)");
	shouldNotThrow("source.stop()");

	// Verify that start(0, 0) doesn't signal.
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	shouldNotThrow("source.start(0, 0)");

	// Verify that start(0, -0.0) doesn't signal.
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	shouldNotThrow("source.start(0, -1/Infinity)");

	// It's not clear from the spec, but I think it's valid to call start(). The spec is silent on
	// what happens if we call stop() afterwards, so don't call it.
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.start()");

	buffer = context.createBuffer(1,1, context.sampleRate);
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	shouldThrow("source.stop()");

	buffer = context.createBuffer(1,1, context.sampleRate);
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	shouldNotThrow("source.start()");
	shouldThrow("source.start()");

	buffer = context.createBuffer(1,1, context.sampleRate);
	shouldNotThrow("source = context.createBufferSource()");
	shouldNotThrow("source.buffer = buffer");
	shouldNotThrow("source.start()");
	shouldNotThrow("source.stop()");


	// Start/stop for OscillatorNodes
	shouldNotThrow("source = context.createOscillator()");
	shouldThrow("source.start(-Number.MIN_VALUE)");
	shouldThrow("source.start(Infinity)");
	shouldThrow("source.start(-Infinity)");
	shouldThrow("source.start(NaN)");
	shouldNotThrow("source.start()");
	shouldThrow("source.stop(-Number.MIN_VALUE)");
	shouldThrow("source.stop(Infinity)");
	shouldThrow("source.stop(-Infinity)");
	shouldThrow("source.stop(NaN)");
	shouldNotThrow("source.stop()");

	shouldNotThrow("osc = context.createOscillator()");
	shouldThrow("osc.stop()");
	shouldNotThrow("osc1 = context.createOscillator()");
	shouldNotThrow("osc1.start()");
	shouldNotThrow("osc1.stop()");

	// exponentialRampToValue should throw on non-positive target values.
	node = context.createGain();
	node.connect(context.destination);
	shouldThrow("node.gain.exponentialRampToValueAtTime(-1, 0.1)");
	shouldThrow("node.gain.exponentialRampToValueAtTime(0, 0.1)");
	// See crbug.com/459391.
	// Math.pow(2, -149) = 1.401298464324817e-45 is the double-float value of the
	// least positive single float number. We do it this way to make sure no round-off or conversion
	// errors happen when reading 1.401298464324817e-45.
	shouldNotThrow("node.gain.exponentialRampToValueAtTime(Math.pow(2, -149), 0.1)");
	// Math.pow(2, -150) = 7.006492321624085d-46 is the largest double float value such that
	// conversion to a float produces 0. Any larger value would produce a non-zero value when
	// converted to a single float.
	shouldThrow("node.gain.exponentialRampToValueAtTime(Math.pow(2, -150), 0.1)");

	// Convolver buffer rate must match context rate. Create on offline context so we
	// specify the context rate exactly, in case the test is run on platforms with different
	// HW sample rates.
	shouldNotThrow("oc = new OfflineAudioContext(1, 44100, 44100)");
	shouldNotThrow("conv = oc.createConvolver()");
	shouldThrow("conv.buffer = oc.createBuffer(1, 100, 22050)");
	// conv.buffer should be unchanged (null) because the above failed.
	shouldBeNull("conv.buffer");

	// PannerNode channel count and mode
	panner = context.createPanner();
	// Channel count can only be set to 1 or 2.
	shouldNotThrow("panner.channelCount = 1");
	shouldNotThrow("panner.channelCount = 2");
	shouldThrowAndBeUnchanged("panner.channelCount", "0");
	shouldThrowAndBeUnchanged("panner.channelCount", "3");
	// It is illegal to set the mode to 'max'
	shouldThrowAndBeUnchanged("panner.channelCountMode", "'max'");
	shouldNotThrow("panner.channelCountMode = 'explicit'");
	shouldNotThrow("panner.channelCountMode = 'clamped-max'");
	shouldNotThrow("panner.channelCountMode = 'junk'");

	// Test channel count and mode for a ScriptProcessor.
	shouldNotThrow("script = context.createScriptProcessor(256, 3)");
	// Make sure the channelCount and mode are set correctly.
	shouldBeEqualToNumber("script.channelCount", 3);
	shouldBeEqualToString("script.channelCountMode", "explicit");
	// Cannot change the channelCount or mode to anything else
	shouldNotThrow("script.channelCount = 3");
	shouldThrowAndBeUnchanged("script.channelCount", "1");

	shouldThrowAndBeUnchanged("script.channelCount", "7");
	shouldNotThrow("script.channelCountMode = 'explicit'");
	shouldThrowAndBeUnchanged("script.channelCountMode", "'max'");
	shouldThrowAndBeUnchanged("script.channelCountMode", "'clamped-max'");
	shouldNotThrow("script.channelCountMode = 'junk'");

	// noteOn and noteOff don't exist anymore
	shouldBeUndefined("osc.noteOn");
	shouldBeUndefined("osc.noteOff");
	shouldBeUndefined("source.noteOn");
	shouldBeUndefined("source.noteOff");
	}

	runTest();
	successfullyParsed = true;

	</script>
	</body>
	</html>