1 files changed, 44 insertions, 0 deletions
diff --git a/dom/localstorage/test/browser_private_ls.js b/dom/localstorage/test/browser_private_ls.js
new file mode 100644
index 0000000000..5b375c90e1
--- /dev/null
+++ b/dom/localstorage/test/browser_private_ls.js
@@ -0,0 +1,44 @@
+/**
+ * This test is mainly to verify that datastores are cleared when the last
+ * private browsing context exited.
+ */
+
+async function lsCheckFunc() {
+  let storage = content.localStorage;
+
+  if (storage.length) {
+    return false;
+  }
+
+  // Store non-ASCII value to verify bug 1552428.
+  storage.setItem("foo", "úžasné");
+
+  return true;
+}
+
+function checkTabWindowLS(tab) {
+  return SpecialPowers.spawn(tab.linkedBrowser, [], lsCheckFunc);
+}
+
+add_task(async function () {
+  const pageUrl =
+    "http://example.com/browser/dom/localstorage/test/page_private_ls.html";
+
+  for (let i = 0; i < 2; i++) {
+    let privateWin = await BrowserTestUtils.openNewBrowserWindow({
+      private: true,
+    });
+
+    let privateTab = await BrowserTestUtils.openNewForegroundTab(
+      privateWin.gBrowser,
+      pageUrl
+    );
+
+    ok(
+      await checkTabWindowLS(privateTab),
+      "LS works correctly in a private-browsing page."
+    );
+
+    await BrowserTestUtils.closeWindow(privateWin);
+  }
+});