1 files changed, 100 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_687710_2.js b/browser/components/sessionstore/test/browser_687710_2.js
new file mode 100644
index 0000000000..e54cfd4ddf
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_687710_2.js
@@ -0,0 +1,100 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that the fix for bug 687710 isn't too aggressive -- shentries which are
+// cousins should be able to share bfcache entries.
+
+var stateBackup = ss.getBrowserState();
+
+var state = {
+  entries: [
+    {
+      docIdentifier: 1,
+      url: "http://example.com?1",
+      triggeringPrincipal_base64,
+      children: [
+        {
+          docIdentifier: 10,
+          url: "http://example.com?10",
+          triggeringPrincipal_base64,
+        },
+      ],
+    },
+    {
+      docIdentifier: 1,
+      url: "http://example.com?1#a",
+      triggeringPrincipal_base64,
+      children: [
+        {
+          docIdentifier: 10,
+          url: "http://example.com?10#aa",
+          triggeringPrincipal_base64,
+        },
+      ],
+    },
+  ],
+};
+
+add_task(async function test() {
+  let tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  await promiseTabState(tab, state);
+  if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+    await SpecialPowers.spawn(tab.linkedBrowser, [], function() {
+      function compareEntries(i, j, history) {
+        let e1 = history.getEntryAtIndex(i);
+        let e2 = history.getEntryAtIndex(j);
+
+        ok(e1.sharesDocumentWith(e2), `${i} should share doc with ${j}`);
+        is(e1.childCount, e2.childCount, `Child count mismatch (${i}, ${j})`);
+
+        for (let c = 0; c < e1.childCount; c++) {
+          let c1 = e1.GetChildAt(c);
+          let c2 = e2.GetChildAt(c);
+
+          ok(
+            c1.sharesDocumentWith(c2),
+            `Cousins should share documents. (${i}, ${j}, ${c})`
+          );
+        }
+      }
+
+      let history = docShell.browsingContext.childSessionHistory.legacySHistory;
+
+      is(history.count, 2, "history.count");
+      for (let i = 0; i < history.count; i++) {
+        for (let j = 0; j < history.count; j++) {
+          compareEntries(i, j, history);
+        }
+      }
+    });
+  } else {
+    function compareEntries(i, j, history) {
+      let e1 = history.getEntryAtIndex(i);
+      let e2 = history.getEntryAtIndex(j);
+
+      ok(e1.sharesDocumentWith(e2), `${i} should share doc with ${j}`);
+      is(e1.childCount, e2.childCount, `Child count mismatch (${i}, ${j})`);
+
+      for (let c = 0; c < e1.childCount; c++) {
+        let c1 = e1.GetChildAt(c);
+        let c2 = e2.GetChildAt(c);
+
+        ok(
+          c1.sharesDocumentWith(c2),
+          `Cousins should share documents. (${i}, ${j}, ${c})`
+        );
+      }
+    }
+
+    let history = tab.linkedBrowser.browsingContext.sessionHistory;
+
+    is(history.count, 2, "history.count");
+    for (let i = 0; i < history.count; i++) {
+      for (let j = 0; j < history.count; j++) {
+        compareEntries(i, j, history);
+      }
+    }
+  }
+
+  ss.setBrowserState(stateBackup);
+});