1 files changed, 42 insertions, 0 deletions
diff --git a/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-02.js b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-02.js
new file mode 100644
index 000000000..f24fb1905
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+++ b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-automation-data-02.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test AudioNode#addAutomationEvent() when automation series ends with
+ * `setTargetAtTime`, which approaches its target to infinity.
+ */
+
+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, 0.1]);
+  yield oscNode.addAutomationEvent("frequency", "linearRampToValueAtTime", [500, 0.4]);
+  yield oscNode.addAutomationEvent("frequency", "exponentialRampToValueAtTime", [200, 0.6]);
+  // End with a setTargetAtTime event, as the target approaches infinity, which will
+  // give us more points to render than the default 2000
+  yield oscNode.addAutomationEvent("frequency", "setTargetAtTime", [1000, 2, 0.5]);
+
+  var { events, values } = yield oscNode.getAutomationData("frequency");
+
+  is(events.length, 4, "4 recorded events returned.");
+  is(values.length, 4000, "4000 value points returned when ending with exponentiall approaching automator.");
+
+  checkAutomationValue(values, 2.01, 215.055);
+  checkAutomationValue(values, 2.1, 345.930);
+  checkAutomationValue(values, 3, 891.601);
+  checkAutomationValue(values, 5, 998.01);
+
+  // Refetch the automation data to ensure it recalculates correctly (bug 1118071)
+  var { events, values } = yield oscNode.getAutomationData("frequency");
+
+  checkAutomationValue(values, 2.01, 215.055);
+  checkAutomationValue(values, 2.1, 345.930);
+  checkAutomationValue(values, 3, 891.601);
+  checkAutomationValue(values, 5, 998.01);
+
+  yield removeTab(target.tab);
+});