Add tests for hover component

test/helper/mock_input.lua

@@ -50,4 +50,13 @@ function M.input_empty(x, y)
 end
 
 
+function M.input_empty_action_nil(x, y)
+	return nil, {
+		x = x,
+		y = y,
+	}
+end
+
+
+
 return M

test/helper/test_helper.lua

@@ -11,7 +11,7 @@ end
 -- Callback for return value from function
 function M.get_function(callback)
 	local listener = {}
-	listener.callback = function() if callback then return callback() end end
+	listener.callback = function(...) if callback then return callback(...) end end
 	mock.mock(listener)
 	return function(...) return listener.callback(...) end, listener.callback
 end