1 files changed, 41 insertions, 0 deletions
diff --git a/browser/components/contextualidentity/test/browser/browser_windowOpen.js b/browser/components/contextualidentity/test/browser/browser_windowOpen.js
new file mode 100644
index 0000000000..d550b03ed8
--- /dev/null
+++ b/browser/components/contextualidentity/test/browser/browser_windowOpen.js
@@ -0,0 +1,41 @@
+"use strict";
+
+// Here we want to test that a new opened window shows the same UI of the
+// parent one if this has been loaded from a particular container.
+
+const BASE_URI =
+  "http://mochi.test:8888/browser/browser/components/" +
+  "contextualidentity/test/browser/empty_file.html";
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.userContext.enabled", true],
+      ["browser.link.open_newwindow", 2],
+    ],
+  });
+});
+
+add_task(async function test() {
+  info("Creating a tab with UCI = 1...");
+  let tab = BrowserTestUtils.addTab(gBrowser, BASE_URI, { userContextId: 1 });
+  is(tab.getAttribute("usercontextid"), "1", "New tab has UCI equal 1");
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  info("Opening a new window from this tab...");
+  let newWinPromise = BrowserTestUtils.waitForNewWindow({ url: BASE_URI });
+  SpecialPowers.spawn(browser, [BASE_URI], function (url) {
+    content.window.newWindow = content.window.open(url, "_blank");
+  });
+
+  let newWin = await newWinPromise;
+  let newTab = newWin.gBrowser.selectedTab;
+
+  is(newTab.getAttribute("usercontextid"), "1", "New tab has UCI equal 1");
+
+  info("Closing the new window and tab...");
+  await BrowserTestUtils.closeWindow(newWin);
+  BrowserTestUtils.removeTab(tab);
+});