1 files changed, 36 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-preview-module.js b/devtools/client/debugger/test/mochitest/browser_dbg-preview-module.js
new file mode 100644
index 0000000000..be51ec88a4
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-preview-module.js
@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// Test hovering in a script that is paused on load
+// and doesn't have functions.
+
+"use strict";
+
+add_task(async function () {
+  const dbg = await initDebugger("doc-scripts.html");
+
+  const onNavigated = navigate(dbg, "doc-on-load.html");
+
+  // wait for `top-level.js` to load and to pause at a debugger statement
+  await waitForSelectedSource(dbg, "top-level.js");
+  await waitForPaused(dbg);
+
+  await assertPreviews(dbg, [
+    {
+      line: 1,
+      column: 6,
+      expression: "obj",
+      fields: [
+        ["foo", "1"],
+        ["bar", "2"],
+      ],
+    },
+  ]);
+
+  await assertPreviewTooltip(dbg, 2, 7, { result: "3", expression: "func" });
+
+  info("Resume and wait for full navigation of the tab");
+  await resume(dbg);
+  await onNavigated;
+});