1 files changed, 37 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_duplicate_tab_in_new_window.js b/browser/components/sessionstore/test/browser_duplicate_tab_in_new_window.js
new file mode 100644
index 0000000000..b3e5bfcdba
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_duplicate_tab_in_new_window.js
@@ -0,0 +1,37 @@
+ChromeUtils.defineESModuleGetters(this, {
+  SessionStore: "resource:///modules/sessionstore/SessionStore.sys.mjs",
+});
+
+add_task(async function () {
+  await BrowserTestUtils.withNewTab(
+    "https://example.com",
+    async function (aBrowser) {
+      BrowserTestUtils.loadURIString(aBrowser, "https://example.org");
+      await BrowserTestUtils.browserLoaded(aBrowser);
+
+      let windowOpened = BrowserTestUtils.waitForNewWindow(
+        "https://example.org"
+      );
+      let newWindow = gBrowser.replaceTabWithWindow(
+        gBrowser.getTabForBrowser(aBrowser)
+      );
+      await windowOpened;
+      let newTab = SessionStore.duplicateTab(
+        newWindow,
+        newWindow.gBrowser.selectedTab
+      );
+
+      await BrowserTestUtils.browserLoaded(newTab.linkedBrowser);
+
+      await SpecialPowers.spawn(
+        newTab.linkedBrowser,
+        ["https://example.org"],
+        async ORIGIN => {
+          is(content.window.origin, ORIGIN);
+        }
+      );
+
+      BrowserTestUtils.closeWindow(newWindow);
+    }
+  );
+});