michael@0: function test() {
michael@0:   var tab1 = gBrowser.selectedTab;
michael@0:   var tab2 = gBrowser.addTab();
michael@0:   var childTab1;
michael@0:   var childTab2;
michael@0: 
michael@0:   childTab1 = gBrowser.addTab("about:blank", { relatedToCurrent: true });
michael@0:   gBrowser.selectedTab = childTab1;
michael@0:   gBrowser.removeCurrentTab();
michael@0:   is(idx(gBrowser.selectedTab), idx(tab1),
michael@0:      "closing a tab next to its parent selects the parent");
michael@0: 
michael@0:   childTab1 = gBrowser.addTab("about:blank", { relatedToCurrent: true });
michael@0:   gBrowser.selectedTab = tab2;
michael@0:   gBrowser.selectedTab = childTab1;
michael@0:   gBrowser.removeCurrentTab();
michael@0:   is(idx(gBrowser.selectedTab), idx(tab2),
michael@0:      "closing a tab next to its parent doesn't select the parent if another tab had been selected ad interim");
michael@0: 
michael@0:   gBrowser.selectedTab = tab1;
michael@0:   childTab1 = gBrowser.addTab("about:blank", { relatedToCurrent: true });
michael@0:   childTab2 = gBrowser.addTab("about:blank", { relatedToCurrent: true });
michael@0:   gBrowser.selectedTab = childTab1;
michael@0:   gBrowser.removeCurrentTab();
michael@0:   is(idx(gBrowser.selectedTab), idx(childTab2),
michael@0:      "closing a tab next to its parent selects the next tab with the same parent");
michael@0:   gBrowser.removeCurrentTab();
michael@0:   is(idx(gBrowser.selectedTab), idx(tab2),
michael@0:      "closing the last tab in a set of child tabs doesn't go back to the parent");
michael@0: 
michael@0:   gBrowser.removeTab(tab2);
michael@0: }
michael@0: 
michael@0: function idx(tab) {
michael@0:   return Array.indexOf(gBrowser.tabs, tab);
michael@0: }