1 files changed, 49 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar.js b/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar.js
new file mode 100644
index 0000000000..88bedca17b
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_jsterm_helper_dollar.js
@@ -0,0 +1,49 @@
+/* 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);
+
+  let message = await executeAndWaitForResultMessage(
+    hud,
+    "$('main')",
+    "<main>"
+  );
+  ok(message, "`$('main')` worked");
+
+  message = await executeAndWaitForResultMessage(
+    hud,
+    "$('main > ul > li')",
+    "<li>"
+  );
+  ok(message, "`$('main > ul > li')` worked");
+
+  message = await executeAndWaitForResultMessage(
+    hud,
+    "$('main > ul > li').tagName",
+    "LI"
+  );
+  ok(message, "`$` result can be used right away");
+
+  message = await executeAndWaitForResultMessage(hud, "$('div')", "null");
+  ok(message, "`$('div')` does return null");
+
+  message = await executeAndWaitForErrorMessage(
+    hud,
+    "$(':foo')",
+    "':foo' is not a valid selector"
+  );
+  ok(message, "`$(':foo')` returns an error message");
+});