1 files changed, 64 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_highlighter_console_helper.js b/devtools/client/webconsole/test/browser/browser_webconsole_highlighter_console_helper.js
new file mode 100644
index 0000000000..c54f9cdf1f
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_highlighter_console_helper.js
@@ -0,0 +1,64 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that the $0 console helper works as intended. See Bug 653531.
+
+"use strict";
+
+const TEST_URI = `data:text/html;charset=utf-8,<!DOCTYPE html>
+<head>
+  <title>Inspector Tree Selection Test</title>
+</head>
+<body>
+  <div>
+    <h1>Inspector Tree Selection Test</h1>
+    <p>This is some example text</p>
+    <p>${loremIpsum()}</p>
+  </div>
+  <div>
+    <p>${loremIpsum()}</p>
+  </div>
+</body>`.replace("\n", "");
+
+add_task(async function () {
+  const toolbox = await openNewTabAndToolbox(TEST_URI, "inspector");
+  await selectNodeWithPicker(toolbox, "h1");
+
+  info("Picker mode stopped, <h1> selected, now switching to the console");
+  const hud = await openConsole();
+
+  await clearOutput(hud);
+
+  await executeAndWaitForResultMessage(hud, "$0", "<h1>");
+  ok(true, "correct output for $0");
+
+  await clearOutput(hud);
+
+  const newH1Content = "newH1Content";
+  await executeAndWaitForResultMessage(
+    hud,
+    `$0.textContent = "${newH1Content}";$0`,
+    "<h1>"
+  );
+
+  ok(true, "correct output for $0 after setting $0.textContent");
+  const textContent = await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [],
+    () => content.document.querySelector("h1").textContent
+  );
+  is(textContent, newH1Content, "node successfully updated");
+});
+
+function loremIpsum() {
+  return `Lorem ipsum dolor sit amet, consectetur adipisicing
+elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco
+laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
+dolor in reprehenderit in voluptate velit esse cillum dolore eu
+fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
+proident, sunt in culpa qui officia deserunt mollit anim id est laborum.`.replace(
+    "\n",
+    ""
+  );
+}