1 files changed, 40 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/browser_bug1181073.js b/dom/media/webaudio/test/browser_bug1181073.js
new file mode 100644
index 000000000..6ee48144c
--- /dev/null
+++ b/dom/media/webaudio/test/browser_bug1181073.js
@@ -0,0 +1,40 @@
+add_task(function*() {
+  // Make the min_background_timeout_value very high to avoid problems on slow machines
+  yield new Promise(resolve => SpecialPowers.pushPrefEnv({
+    'set': [['dom.min_background_timeout_value', 3000]]
+  }, resolve));
+
+  // Make a new tab, and put it in the background
+  yield BrowserTestUtils.withNewTab("about:blank", function*(browser) {
+    yield BrowserTestUtils.withNewTab("about:blank", function*() {
+      let time = yield ContentTask.spawn(browser, null, function () {
+        return new Promise(resolve => {
+          let start = content.performance.now();
+          let id = content.window.setInterval(function() {
+            let end = content.performance.now();
+            content.window.clearInterval(id);
+            resolve(end - start);
+          }, 0);
+        });
+      });
+
+      ok(time > 2000, "Interval is throttled with no webaudio (" + time + " ms)");
+
+      time = yield ContentTask.spawn(browser, null, function () {
+        return new Promise(resolve => {
+          // Create an audio context, and save it on the window so it doesn't get GCed
+          content.window._audioCtx = new content.window.AudioContext();
+
+          let start = content.performance.now();
+          let id = content.window.setInterval(function() {
+            let end = content.performance.now();
+            content.window.clearInterval(id);
+            resolve(end - start);
+          }, 0);
+        });
+      });
+
+      ok(time < 1000, "Interval is not throttled with an audio context present (" + time + " ms)");
+    });
+  });
+});