1 files changed, 74 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_relatedTabs.js b/browser/base/content/test/general/browser_relatedTabs.js
new file mode 100644
index 0000000000..22ed8fbb1b
--- /dev/null
+++ b/browser/base/content/test/general/browser_relatedTabs.js
@@ -0,0 +1,74 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function () {
+  is(gBrowser.tabs.length, 1, "one tab is open initially");
+
+  // Add several new tabs in sequence, interrupted by selecting a
+  // different tab, moving a tab around and closing a tab,
+  // returning a list of opened tabs for verifying the expected order.
+  // The new tab behaviour is documented in bug 465673
+  let tabs = [];
+  let ReferrerInfo = Components.Constructor(
+    "@mozilla.org/referrer-info;1",
+    "nsIReferrerInfo",
+    "init"
+  );
+
+  function addTab(aURL, aReferrer) {
+    let referrerInfo = new ReferrerInfo(
+      Ci.nsIReferrerInfo.EMPTY,
+      true,
+      aReferrer
+    );
+    let tab = BrowserTestUtils.addTab(gBrowser, aURL, { referrerInfo });
+    tabs.push(tab);
+    return BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  }
+
+  await addTab("http://mochi.test:8888/#0");
+  gBrowser.selectedTab = tabs[0];
+  await addTab("http://mochi.test:8888/#1");
+  await addTab("http://mochi.test:8888/#2", gBrowser.currentURI);
+  await addTab("http://mochi.test:8888/#3", gBrowser.currentURI);
+  gBrowser.selectedTab = tabs[tabs.length - 1];
+  gBrowser.selectedTab = tabs[0];
+  await addTab("http://mochi.test:8888/#4", gBrowser.currentURI);
+  gBrowser.selectedTab = tabs[3];
+  await addTab("http://mochi.test:8888/#5", gBrowser.currentURI);
+  gBrowser.removeTab(tabs.pop());
+  await addTab("about:blank", gBrowser.currentURI);
+  gBrowser.moveTabTo(gBrowser.selectedTab, 1);
+  await addTab("http://mochi.test:8888/#6", gBrowser.currentURI);
+  await addTab();
+  await addTab("http://mochi.test:8888/#7");
+
+  function testPosition(tabNum, expectedPosition, msg) {
+    is(
+      Array.prototype.indexOf.call(gBrowser.tabs, tabs[tabNum]),
+      expectedPosition,
+      msg
+    );
+  }
+
+  testPosition(0, 3, "tab without referrer was opened to the far right");
+  testPosition(1, 7, "tab without referrer was opened to the far right");
+  testPosition(2, 5, "tab with referrer opened immediately to the right");
+  testPosition(3, 1, "next tab with referrer opened further to the right");
+  testPosition(
+    4,
+    4,
+    "tab selection changed, tab opens immediately to the right"
+  );
+  testPosition(
+    5,
+    6,
+    "blank tab with referrer opens to the right of 3rd original tab where removed tab was"
+  );
+  testPosition(6, 2, "tab has moved, new tab opens immediately to the right");
+  testPosition(7, 8, "blank tab without referrer opens at the end");
+  testPosition(8, 9, "tab without referrer opens at the end");
+
+  tabs.forEach(gBrowser.removeTab, gBrowser);
+});