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+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworkletglobalscope-sample-rate.https.html
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+<!DOCTYPE html>
+<html>
+ <head>
+ <title>
+ Test sampleRate in AudioWorkletGlobalScope
+ </title>
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+ <script src="/webaudio/resources/audit.js"></script>
+ </head>
+ <body>
+ <script id="layout-test-code">
+ let audit = Audit.createTaskRunner();
+
+ setup(() => {
+ let sampleRate = 48000;
+ let renderLength = 512;
+ let context = new OfflineAudioContext(1, renderLength, sampleRate);
+
+ let filePath = 'processors/one-pole-processor.js';
+
+ // Without rendering the context, attempt to access |sampleRate| in the
+ // global scope as soon as it is created.
+ audit.define(
+ 'Query |sampleRate| upon AudioWorkletGlobalScope construction',
+ (task, should) => {
+ let onePoleFilterNode =
+ new AudioWorkletNode(context, 'one-pole-filter');
+ let frequencyParam = onePoleFilterNode.parameters.get('frequency');
+
+ should(frequencyParam.maxValue,
+ 'frequencyParam.maxValue')
+ .beEqualTo(0.5 * context.sampleRate);
+
+ task.done();
+ });
+
+ context.audioWorklet.addModule(filePath).then(() => {
+ audit.run();
+ });
+ });
+ </script>
+ </body>
+</html>