1 files changed, 47 insertions, 0 deletions
diff --git a/devtools/client/webaudioeditor/test/browser_audionode-actor-get-set-param.js b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-set-param.js
new file mode 100644
index 000000000..0d4c7c5c7
--- /dev/null
+++ b/devtools/client/webaudioeditor/test/browser_audionode-actor-get-set-param.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test AudioNode#getParam() / AudioNode#setParam()
+ */
+
+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")
+  ]);
+
+  let freq = yield oscNode.getParam("frequency");
+  info(typeof freq);
+  is(freq, 440, "AudioNode:getParam correctly fetches AudioParam");
+
+  let type = yield oscNode.getParam("type");
+  is(type, "sine", "AudioNode:getParam correctly fetches non-AudioParam");
+
+  type = yield oscNode.getParam("not-a-valid-param");
+  ok(type.type === "undefined",
+    "AudioNode:getParam correctly returns a grip value for `undefined` for an invalid param.");
+
+  let resSuccess = yield oscNode.setParam("frequency", 220);
+  freq = yield oscNode.getParam("frequency");
+  is(freq, 220, "AudioNode:setParam correctly sets a `number` AudioParam");
+  is(resSuccess, undefined, "AudioNode:setParam returns undefined for correctly set AudioParam");
+
+  resSuccess = yield oscNode.setParam("type", "square");
+  type = yield oscNode.getParam("type");
+  is(type, "square", "AudioNode:setParam correctly sets a `string` non-AudioParam");
+  is(resSuccess, undefined, "AudioNode:setParam returns undefined for correctly set AudioParam");
+
+  try {
+    yield oscNode.setParam("frequency", "hello");
+    ok(false, "setParam with invalid types should throw");
+  } catch (e) {
+    ok(/is not a finite floating-point/.test(e.message), "AudioNode:setParam returns error with correct message when attempting an invalid assignment");
+    is(e.type, "TypeError", "AudioNode:setParam returns error with correct type when attempting an invalid assignment");
+    freq = yield oscNode.getParam("frequency");
+    is(freq, 220, "AudioNode:setParam does not modify value when an error occurs");
+  }
+
+  yield removeTab(target.tab);
+});