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/**
* @class ProcessGetterTestInstanceProcessor
* @extends AudioWorkletProcessor
*
* This processor class tests that a 'process' getter on an
* AudioWorkletProcessorConstructor instance is called at the right times.
*/
class ProcessGetterTestInstanceProcessor extends AudioWorkletProcessor {
constructor() {
super();
this.getterCallCount = 0;
this.totalProcessCallCount = 0;
Object.defineProperty(this, 'process', { get: function() {
if (!(this instanceof ProcessGetterTestInstanceProcessor)) {
throw new Error('`process` getter called with bad `this`.');
}
++this.getterCallCount;
let functionCallCount = 0;
return () => {
if (++functionCallCount > 1) {
const message = 'Closure of function returned from `process` getter' +
' should be used for only one call.'
this.port.postMessage({message: message});
throw new Error(message);
}
if (++this.totalProcessCallCount < 2) {
return true; // Expect another getter call.
}
if (this.totalProcessCallCount != this.getterCallCount) {
const message =
'Getter should be called only once for each process() call.'
this.port.postMessage({message: message});
throw new Error(message);
}
this.port.postMessage({message: 'done'});
return false; // No more calls required.
};
}});
}
}
registerProcessor('process-getter-test-instance',
ProcessGetterTestInstanceProcessor);
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