From 4638d8fa63682b3a2d78b7cc753f88fe4277e3ae Mon Sep 17 00:00:00 2001
From: Paul Adenot <paul@paul.cx>
Date: Fri, 13 Jul 2018 21:45:34 +0000
Subject: [PATCH] Adjust a web platform test slightly to test that the
 parameter is a-rate.

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1472550
gecko-commit: 5b8172ac07f62ad785c0d8df160696d3173bd9fe
gecko-integration-branch: autoland
gecko-reviewers: karlt
---
 .../test-pannernode-automation.html                      | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/webaudio/the-audio-api/the-pannernode-interface/test-pannernode-automation.html b/webaudio/the-audio-api/the-pannernode-interface/test-pannernode-automation.html
index 74bbdc6fe1c327..ce474b10b5122e 100644
--- a/webaudio/the-audio-api/the-pannernode-interface/test-pannernode-automation.html
+++ b/webaudio/the-audio-api/the-pannernode-interface/test-pannernode-automation.html
@@ -4,13 +4,18 @@
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
 <script>
+
+// This value is purposefuly not aligned on a 128-block boundary so that we test
+// that the PannerNode position audioparam is a-rate.
+const POSITION_CHANGE_FRAME = 1111;
+
 promise_test(function(t) {
   var ac = new OfflineAudioContext(2, 2048, 44100);
   var panner = ac.createPanner();
   panner.positionX.value = -1;
   panner.positionY.value = -1;
   panner.positionZ.value = 1;
-  panner.positionX.setValueAtTime(1, 1024/ac.sampleRate);
+  panner.positionX.setValueAtTime(1, POSITION_CHANGE_FRAME/ac.sampleRate);
   var osc = ac.createOscillator();
   osc.connect(panner);
   panner.connect(ac.destination);
@@ -19,7 +24,7 @@
     var left = buffer.getChannelData(0);
     var right = buffer.getChannelData(1);
     for (var i = 0; i < 2048; ++i) {
-      if (i < 1024) {
+      if (i < POSITION_CHANGE_FRAME) {
         assert_true(Math.abs(left[i]) >= Math.abs(right[i]), "index " + i + " should be on the left");
       } else {
         assert_true(Math.abs(left[i]) < Math.abs(right[i]), "index " + i + " should be on the right");