1 files changed, 34 insertions, 0 deletions
diff --git a/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-03.js b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-03.js
new file mode 100644
index 000000000..7de509ccd
--- /dev/null
+++ b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-03.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that `cancelScheduledEvents` clears out events on and after
+ * its argument.
+ */
+
+add_task(function* () {
+  let { target, front } = yield initBackend(SIMPLE_CONTEXT_URL);
+  let [_, [destNode, oscNode, gainNode]] = yield Promise.all([
+    front.setup({ reload: true }),
+    get3(front, "create-node")
+  ]);
+
+  yield oscNode.addAutomationEvent("frequency", "setValueAtTime", [300, 0]);
+  yield oscNode.addAutomationEvent("frequency", "linearRampToValueAtTime", [500, 0.9]);
+  yield oscNode.addAutomationEvent("frequency", "setValueAtTime", [700, 1]);
+  yield oscNode.addAutomationEvent("frequency", "exponentialRampToValueAtTime", [1000, 2]);
+  yield oscNode.addAutomationEvent("frequency", "cancelScheduledValues", [1]);
+
+  var { events, values } = yield oscNode.getAutomationData("frequency");
+
+  is(events.length, 2, "2 recorded events returned.");
+  is(values.length, 2000, "2000 value points returned");
+
+  checkAutomationValue(values, 0, 300);
+  checkAutomationValue(values, 0.5, 411.15);
+  checkAutomationValue(values, 0.9, 499.9);
+  checkAutomationValue(values, 1, 499.9);
+  checkAutomationValue(values, 2, 499.9);
+
+  yield removeTab(target.tab);
+});