diff -r 000000000000 -r 6474c204b198 browser/devtools/webaudioeditor/test/browser_audionode-actor-is-source.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webaudioeditor/test/browser_audionode-actor-is-source.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test AudioNode#isSource()
+ */
+
+function spawnTest () {
+  let [target, debuggee, front] = yield initBackend(SIMPLE_NODES_URL);
+  let [_, nodes] = yield Promise.all([
+    front.setup({ reload: true }),
+    getN(front, "create-node", 14)
+  ]);
+
+  let actualTypes = yield Promise.all(nodes.map(node => node.getType()));
+  let isSourceResult = yield Promise.all(nodes.map(node => node.isSource()));
+
+  actualTypes.forEach((type, i) => {
+    let shouldBeSource = type === "AudioBufferSourceNode" || type === "OscillatorNode";
+    if (shouldBeSource)
+      is(isSourceResult[i], true, type + "'s isSource() yields into `true`");
+    else
+      is(isSourceResult[i], false, type + "'s isSource() yields into `false`");
+  });
+
+  yield removeTab(target.tab);
+  finish();
+}