1 files changed, 31 insertions, 0 deletions
diff --git a/devtools/client/responsive/test/browser/browser_in_rdm_pane.js b/devtools/client/responsive/test/browser/browser_in_rdm_pane.js
new file mode 100644
index 0000000000..546e8d5b4a
--- /dev/null
+++ b/devtools/client/responsive/test/browser/browser_in_rdm_pane.js
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Verify the inRDMPane property is set on a document when that
+// document is being viewed in Responsive Design Mode.
+
+const TEST_URL = "http://example.com/";
+
+addRDMTask(TEST_URL, async function ({ ui }) {
+  const viewportBrowser = ui.getViewportBrowser();
+
+  const contentURL = await SpecialPowers.spawn(
+    viewportBrowser,
+    [],
+    () => content.document.URL
+  );
+  info("content URL is " + contentURL);
+
+  const contentInRDMPane = await SpecialPowers.spawn(
+    viewportBrowser,
+    [],
+    () => docShell.browsingContext.inRDMPane
+  );
+
+  ok(
+    contentInRDMPane,
+    "After RDM is opened, document should have inRDMPane set to true."
+  );
+});