shims: Fix some bugs for ruled.tag.

tests/examples/shims/client.lua

@@ -5,6 +5,8 @@ local clients = {}
 
 local client, meta = awesome._shim_fake_class()
 
+rawset(client, "_autotags", true)
+
 -- Keep an history of the geometry for validation and images
 local function push_geometry(c)
     table.insert(c._old_geo, c:geometry())
@@ -227,17 +229,20 @@ function client.gen_fake(args)
     function ret:tags(new) --FIXME
         if new then
             ret._tags = new
+            ret:emit_signal("property::tags")
         end
 
         if ret._tags then
             return ret._tags
         end
 
+        if client._autotags then
             for _, t in ipairs(root._tags) do
                 if t.screen == ret.screen then
                     return {t}
                 end
             end
+        end
 
         return {}
     end
@@ -330,7 +335,6 @@ function client.gen_fake(args)
             return meta.__index(self, key)
         end,
         __newindex = function(self, key, value)
-
             if properties["set_"..key] then
                 return properties["set_"..key](self, value)
             end