1 files changed, 59 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar_dollar.js b/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar_dollar.js
new file mode 100644
index 0000000000..b38cd8b0c7
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar_dollar.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URI = `data:text/html,<!DOCTYPE html>
+<main>
+  <ul>
+    <li>First</li>
+    <li>Second</li>
+  </ul>
+  <aside>Sidebar</aside>
+</main>
+`;
+
+add_task(async function () {
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  // Place the mouse on the top left corner to avoid triggering an highlighter request
+  // to the server. See Bug 1535082.
+  EventUtils.synthesizeMouse(
+    hud.ui.outputNode,
+    0,
+    0,
+    { type: "mousemove" },
+    hud.iframeWindow
+  );
+
+  let message = await executeAndWaitForResultMessage(
+    hud,
+    "$$('main')",
+    "Array [ main ]"
+  );
+  ok(message, "`$$('main')` worked");
+
+  message = await executeAndWaitForResultMessage(
+    hud,
+    "$$('main > ul > li')",
+    "Array [ li, li ]"
+  );
+  ok(message, "`$$('main > ul > li')` worked");
+
+  message = await executeAndWaitForResultMessage(
+    hud,
+    "$$('main > ul > li').map(el => el.tagName).join(' - ')",
+    "LI - LI"
+  );
+  ok(message, "`$$` result can be used right away");
+
+  message = await executeAndWaitForResultMessage(hud, "$$('div')", "Array []");
+  ok(message, "`$$('div')` returns an empty array");
+
+  message = await executeAndWaitForErrorMessage(
+    hud,
+    "$$(':foo')",
+    "':foo' is not a valid selector"
+  );
+  ok(message, "`$$(':foo')` returns an error message");
+});