Add initial Druid tests

test/helper/test_helper.lua

@@ -0,0 +1,18 @@
+local mock = require("deftest.mock.mock")
+
+local M = {}
+
+-- Userdata type instead of script self
+function M.get_context()
+	return vmath.vector()
+end
+
+
+function M.get_function()
+	local listener = {}
+	listener.callback = function() end
+	mock.mock(listener)
+	return function(...) listener.callback(...) end, listener.callback
+end
+
+return M