From d46cea9c41e6a77a372db990996e133e39b4d056 Mon Sep 17 00:00:00 2001
From: Nathan Sobo <nathan@github.com>
Date: Sat, 7 Nov 2015 16:01:20 -0700
Subject: [PATCH] Disable throttling in test windows via WebAudio hack
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Throttling in test windows is annoying when tests run interactively,
and *seems* to cause issues with animation frames not firing even in
headless tests, though it’s difficult to fully confirm since this issue
is intermittent.
---
 src/initialize-test-window.coffee | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/initialize-test-window.coffee b/src/initialize-test-window.coffee
index f33cca09d..72a071fb6 100644
--- a/src/initialize-test-window.coffee
+++ b/src/initialize-test-window.coffee
@@ -57,6 +57,12 @@ module.exports = ({blobStore}) ->
 
     document.title = "Spec Suite"
 
+    # Avoid throttling of test window by playing silence
+    context = new AudioContext()
+    source = context.createBufferSource()
+    source.connect(context.destination)
+    source.start(0)
+
     testRunner = require(testRunnerPath)
     legacyTestRunner = require(legacyTestRunnerPath)
     buildDefaultApplicationDelegate = -> new ApplicationDelegate()