1 files changed, 63 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_title_in_session_history.js b/docshell/test/browser/browser_title_in_session_history.js
new file mode 100644
index 0000000000..bdcbbb7dfe
--- /dev/null
+++ b/docshell/test/browser/browser_title_in_session_history.js
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test() {
+  const TEST_PAGE =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "https://example.com"
+    ) + "dummy_page.html";
+  await BrowserTestUtils.withNewTab(TEST_PAGE, async browser => {
+    let titles = await ContentTask.spawn(browser, null, () => {
+      return new Promise(resolve => {
+        let titles = [];
+        content.document.body.innerHTML = "<div id='foo'>foo</div>";
+        content.document.title = "Initial";
+        content.history.pushState("1", "1", "1");
+        content.document.title = "1";
+        content.history.pushState("2", "2", "2");
+        content.document.title = "2";
+        content.location.hash = "hash";
+        content.document.title = "3-hash";
+        content.addEventListener(
+          "popstate",
+          () => {
+            content.addEventListener(
+              "popstate",
+              () => {
+                titles.push(content.document.title);
+                resolve(titles);
+              },
+              { once: true }
+            );
+
+            titles.push(content.document.title);
+            // Test going forward a few steps.
+            content.history.go(2);
+          },
+          { once: true }
+        );
+        // Test going back a few steps.
+        content.history.go(-3);
+      });
+    });
+    is(
+      titles[0],
+      "3-hash",
+      "Document.title should have the value to which it was last time set."
+    );
+    is(
+      titles[1],
+      "3-hash",
+      "Document.title should have the value to which it was last time set."
+    );
+    let sh = browser.browsingContext.sessionHistory;
+    let count = sh.count;
+    is(sh.getEntryAtIndex(count - 1).title, "3-hash");
+    is(sh.getEntryAtIndex(count - 2).title, "2");
+    is(sh.getEntryAtIndex(count - 3).title, "1");
+    is(sh.getEntryAtIndex(count - 4).title, "Initial");
+  });
+});