1 files changed, 36 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/processing-model/cycle-without-delay.html b/testing/web-platform/tests/webaudio/the-audio-api/processing-model/cycle-without-delay.html
new file mode 100644
index 0000000000..cab0f6ca8e
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/processing-model/cycle-without-delay.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html class="a">
+  <head>
+    <title>Cycles without DelayNode in audio node graph</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <script>
+      function doTest() {
+        var off = new OfflineAudioContext(1, 512, 48000);
+        var osc = new OscillatorNode(off);
+        var fb = new GainNode(off);
+        // zero delay feedback loop
+        osc.connect(fb).connect(fb).connect(off.destination);
+        osc.start(0);
+        return off.startRendering().then((b) => {
+          return Promise.resolve(b.getChannelData(0));
+        });
+      }
+
+      promise_test(() => {
+        return doTest().then(samples => {
+          var silent = true;
+          for (var i = 0; i < samples.length; i++) {
+            if (samples[i] != 0.0) {
+              silent = false;
+              break;
+            }
+          }
+          assert_true(silent);
+        });
+      }, 'Test that cycles that don\'t contain a DelayNode are muted');
+    </script>
+  </body>
+</html>