Expose BaseAudioContext prototype

third_party/WebKit/LayoutTests/webaudio/resources/context-properties.js

+// The list of the 'own' properties in various AudioContexts.
+// https://webaudio.github.io/web-audio-api/#BaseAudioContext
+
+
+let BaseAudioContextOwnProperties = [
+  'createAnalyser',
+  'createBiquadFilter',
+  'createBuffer',
+  'createBufferSource',
+  'createChannelMerger',
+  'createChannelSplitter',
+  'createConvolver',
+  'createDelay',
+  'createDynamicsCompressor',
+  'createGain',
+  'createIIRFilter',
+  'createOscillator',
+  'createPanner',
+  'createPeriodicWave',
+  'createScriptProcessor',
+  'createStereoPanner',
+  'createWaveShaper',
+  'currentTime',
+  'decodeAudioData',
+  'destination',
+  'listener',
+  'onstatechange',
+  'resume',
+  'sampleRate',
+  'state',
+  'suspend',
+
+  // TODO(hongchan): Not implemented yet.
+  // 'baseLatency',
+  // 'createConstantSource'

[Raymond Toy, 2016/11/02 22:10:09]

This should be available now.

Also, I think that it would be useful to have a check that BaseAudioContext
doesn't have properties not listed in BaseAudioContextOwnProperties (taking care
of the exceptions).

[hongchan, 2016/11/02 22:46:50]

Done.

+];
+
+
+let AudioContextOwnProperties = [
+  'close',
+
+  // TODO(hongchan): Not implemented yet.
+  // 'outputLatency',
+  // 'getOutputTimestamp',
+
+  // TODO(hongchan): These currently belong to BaseAudioContext.
+  // 'createMediaElementSource',
+  // 'createMediaStreamSource',
+  // 'createMediaStreamDestination',
+];
+
+
+let OfflineAudioContextOwnProperties = [
+  'length',
+  'oncomplete',
+  'startRendering',
+
+  // TODO(hongchan): OAC's suspend is different from the BAC but the interface

[Raymond Toy, 2016/11/02 22:10:09]

"BAC"?

[hongchan, 2016/11/02 22:46:50]

BaseAudioContext.

[Raymond Toy, 2016/11/02 23:01:07]

Let's not use abbreviations.

+  // name is identical. So we have to leave this one out of the batch
+  // comparison.
+  // 'suspend',
+];
+
+
+/**
+ * Check properties in the prototype of BaseAudioContext and its variants.
+ * @param {Object} config Test configuration object.
+ * @param {Object} config.targetPrototype Target prototype.
+ * @param {String} config.targetDescription String description of the target.
+ * @param {Boolean} config.expected Expected test result.
+ * @param {Array} config.propertyDict Property dictionary.
+ */
+function checkContextProperties (config, should) {
+  for (let index in config.propertyDict) {
+    var property = config.propertyDict[index];
+    should(
+      config.targetDescription + '.hasOwnProperty("' + property + '")',
+      config.targetPrototype.hasOwnProperty(property))
+        .beEqualTo(config.expected);
+  }
+}