Add test for menubar.match_empty

tests/test-menubar.lua

@@ -37,8 +37,7 @@ do
     end
 end
 
-runner.run_steps {
-    function(count)
+local show_menubar_and_hide = function(count)
     -- Just show the menubar and hide it.
     -- TODO: Write a proper test. But for the mean time this is better than
     -- nothing (and tells us when errors are thrown).
@@ -53,6 +52,18 @@ runner.run_steps {
         awesome.sync()
         return true
     end
+end
+
+runner.run_steps {
+    function(count)
+        -- Show and hide with defaults
+        return show_menubar_and_hide(count)
+    end,
+
+    function(count)
+        -- Show and hide with match_empty set to false
+        menubar.match_empty = false
+        return show_menubar_and_hide(count)
     end,
 
     function()