third_party/WebKit/LayoutTests/webaudio/audiocontext-close.html

   1 <!doctype html>
   2 <html>
   3 <head>
   4   <title>Test AudioContext.close()</title>
   5   <script src="../resources/js-test.js"></script>
   6   <script src="resources/compatibility.js"></script>
   7   <script src="resources/audio-testing.js"></script>
   8 </head>
   9
  10 <body>
  11   <script>
  12     description("Basic functionality test of closing an AudioContext");
  13     window.jsTestIsAsync = true;
  14
  15     var context;
  16     var destination;
  17     var offline;
  18     var osc;
  19     var gain;
  20     var promise1;
  21     var promise2;
  22     var offlinePromise;
  23     var wave = new Float32Array(1);
  24
  25     var audit = Audit.createTaskRunner();
  26
  27     // Task: test online context (1).
  28     audit.defineTask('test-online-context-1', function (done) {
  29
  30       // Create a context and verify that the various states are correct and
  31       // that close() exists.
  32       shouldNotThrow("context = new AudioContext()");
  33       shouldBeEqualToString("context.state", "running");
  34
  35       // Create gain and oscillator for testing later.
  36       shouldNotThrow("osc = context.createOscillator()");
  37       shouldNotThrow("gain = context.createGain()");
  38       destination = context.destination;
  39       shouldNotThrow("gain.connect(context.destination)");
  40
  41       // Close the context.  When the promise is resolved, continue the next
  42       // test task.
  43       context.close().then(
  44         function () {
  45           testPassed("context.close() was correctly resolved");
  46           shouldNotThrow("gain.disconnect(destination)");
  47         },
  48         function () {
  49           testFailed("context.close() was erroneously rejected");
  50         }
  51       ).then(done);
  52
  53     });
  54
  55     // Task: test online context (2).
  56     audit.defineTask('test-online-context-2', function (done) {
  57
  58       // Context is closed, so verify that we cannot create any more nodes,
  59       // nor connect any.
  60       shouldThrow("context.createAnalyser()");
  61       shouldThrow("context.createBiquadFilter()");
  62
  63       // createBuffer is an exception because it's not really tied in any way
  64       // to an audio context. And it's useful to be able to create a buffer
  65       // inside the oncomplete event of an offline context to use for testing
  66       // purposes.
  67       shouldNotThrow("context.createBuffer(1, 1, 48000)");
  68
  69       shouldThrow("context.createBufferSource()");
  70       shouldThrow("context.createChannelMerger()");
  71       shouldThrow("context.createChannelSplitter()");
  72       shouldThrow("context.createConvolver()");
  73       shouldThrow("context.createDelay()");
  74       shouldThrow("context.createDynamicsCompressor()");
  75       shouldThrow("context.createGain()");
  76       shouldThrow("context.createOscillator()");
  77       shouldThrow("context.createPanner()");
  78       shouldThrow("context.createPeriodicWave(wave, wave)");
  79       shouldThrow("context.createScriptProcessor()");
  80       shouldThrow("context.createStereoPanner()");
  81       shouldThrow("context.createWaveShaper()");
  82
  83       shouldThrow("osc.connect(gain)");
  84       shouldNotThrow("gain.disconnect()");
  85
  86       // Can't resume a context that is closed (released).
  87       context.resume().then(
  88         function () {
  89           testFailed("Attempt to resume a closed context erroneously succeeded");
  90         },
  91         function () {
  92           testPassed("Attempt to resume a closed context was correctly rejected");
  93         }
  94       ).then(done);
  95     });
  96
  97     // Task: test online context (3).
  98     audit.defineTask('test-online-context-3', function (done) {
  99
 100       // Try closing the context again. The promise should be rejected.
 101       context.close().then(
 102         function () {
 103           testFailed("Closing context again erroneously resolved successfully.");
 104         },
 105         function () {
 106           testPassed("Closing context again correctly rejected promise.");
 107           // Finally, run GC. The context should be gone, but this seems difficult to verify.
 108           gc();
 109           shouldBeNull("context.destination");
 110         }
 111       ).then(done);
 112     });
 113
 114     // Task: test offline context (1).
 115     audit.defineTask('test-offline-context-1', function (done) {
 116
 117       // For an offline context, just check that if we try to close the context,
 118       // nothing happens except that the promise returned by close() is rejected.
 119       shouldNotThrow("offline = new OfflineAudioContext(1, 1000, 48000)");
 120       shouldBeEqualToString("offline.state", "suspended");
 121       offline.close().then(
 122         function () {
 123           testFailed("Closing offline context erroneously resolved");
 124         },
 125         function (e) {
 126           if (e.name === "InvalidAccessError") {
 127             testPassed("Closing offline context correctly rejected: " + e);
 128           } else {
 129             testFailed("Closing offline context correctly rejected but expected InvalidAccessError, not: " + e);
 130           }
 131         }
 132       ).then(done);
 133     });
 134
 135     // Task: test offline context (2).
 136     audit.defineTask('test-offline-context-2', function (done) {
 137
 138       // Try closing again
 139       offline.close().then(
 140         function () {
 141           testFailed("Closing offline context again erroneously resolved");
 142         },
 143         function () {
 144           testPassed("Closing offline context again correctly rejected");
 145         }
 146       ).then(
 147         function () {
 148
 149           // Render the context, and check for a valid state
 150           offline.oncomplete = function (event) {
 151             shouldBeEqualToString("event.target.state", "closed");
 152             done();
 153           };
 154           shouldNotThrow("offline.startRendering()");
 155         }
 156       );
 157
 158     });
 159
 160     audit.defineTask('finish-test', function (done) {
 161       done();
 162       finishJSTest();
 163     });
 164
 165     audit.runTasks(
 166       'test-online-context-1',
 167       'test-online-context-2',
 168       'test-online-context-3',
 169       'test-offline-context-1',
 170       'test-offline-context-2',
 171       'finish-test'
 172     );
 173
 174     successfullyParsed = true;
 175   </script>
 176 </body>
 177 </html>