Add m-esr52 at 52.6.0

1 files changed, 52 insertions, 0 deletions

diff --git a/browser/components/sessionstore/test/browser_628270.js b/browser/components/sessionstore/test/browser_628270.js
new file mode 100644
index 000000000..f552cbfda
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_628270.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  let assertNumberOfTabs = function (num, msg) {
+    is(gBrowser.tabs.length, num, msg);
+  }
+
+  let assertNumberOfVisibleTabs = function (num, msg) {
+    is(gBrowser.visibleTabs.length, num, msg);
+  }
+
+  let assertNumberOfPinnedTabs = function (num, msg) {
+    is(gBrowser._numPinnedTabs, num, msg);
+  }
+
+  waitForExplicitFinish();
+
+  // check prerequisites
+  assertNumberOfTabs(1, "we start off with one tab");
+
+  // setup
+  let tab = gBrowser.addTab("about:mozilla");
+
+  whenTabIsLoaded(tab, function () {
+    // hide the newly created tab
+    assertNumberOfVisibleTabs(2, "there are two visible tabs");
+    gBrowser.showOnlyTheseTabs([gBrowser.tabs[0]]);
+    assertNumberOfVisibleTabs(1, "there is one visible tab");
+    ok(tab.hidden, "newly created tab is now hidden");
+
+    // close and restore hidden tab
+    promiseRemoveTab(tab).then(() => {
+      tab = ss.undoCloseTab(window, 0);
+
+      // check that everything was restored correctly, clean up and finish
+      whenTabIsLoaded(tab, function () {
+        is(tab.linkedBrowser.currentURI.spec, "about:mozilla", "restored tab has correct url");
+
+        gBrowser.removeTab(tab);
+        finish();
+      });
+    });
+  });
+}
+
+function whenTabIsLoaded(tab, callback) {
+  tab.linkedBrowser.addEventListener("load", function onLoad() {
+    tab.linkedBrowser.removeEventListener("load", onLoad, true);
+    callback();
+  }, true);
+}