Lua: refactored and extracted test approach

common/space_lua/stdlib/space_lua_test.lua

@@ -0,0 +1,15 @@
+local function assert_equal(a, b)
+    if a ~= b then
+        error("Assertion failed: " .. a .. " is not equal to " .. b)
+    end
+end
+
+-- Test space_lua stuff
+local parsedExpr = space_lua.parse_expression("1 + 1")
+local evalResult = space_lua.eval_expression(parsedExpr)
+assert(evalResult == 2, "Eval should return 2")
+
+-- Slightly more advanced example with augmented environment
+local parsedExpr = space_lua.parse_expression("tostring(a + 1)")
+local evalResult = space_lua.eval_expression(parsedExpr, { a = 1 })
+assert(evalResult == "2", "Eval should return 2 as a string")