1 files changed, 55 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/process-getter-test-prototype-processor.js b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/process-getter-test-prototype-processor.js
new file mode 100644
index 0000000000..cef5fa8b52
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/process-getter-test-prototype-processor.js
@@ -0,0 +1,55 @@
+/**
+ * @class ProcessGetterTestPrototypeProcessor
+ * @extends AudioWorkletProcessor
+ *
+ * This processor class tests that a 'process' getter on
+ * AudioWorkletProcessorConstructor is called at the right times.
+ */
+
+// Reporting errors during registerProcess() is awkward.
+// The occurrance of an error is flagged, so that a trial registration can be
+// performed and registration against the expected AudioWorkletNode name is
+// performed only if no errors are flagged during the trial registration.
+let error_flag = false;
+
+class ProcessGetterTestPrototypeProcessor extends AudioWorkletProcessor {
+  constructor() {
+    super();
+    this.getterCallCount = 0;
+    this.totalProcessCallCount = 0;
+  }
+  get process() {
+    if (!(this instanceof ProcessGetterTestPrototypeProcessor)) {
+      error_flag = true;
+      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('trial-process-getter-test-prototype',
+                  ProcessGetterTestPrototypeProcessor);
+if (!error_flag) {
+  registerProcessor('process-getter-test-prototype',
+                    ProcessGetterTestPrototypeProcessor);
+}