feat: release design system engine, studio and component contracts

packages/compiler/test/function-defaults.test.ts

@@ -0,0 +1,34 @@
+import { expect, test } from "bun:test";
+import { parse } from "@wrnexus/syntax";
+import { generateBrowserModule } from "../src/client-codegen.ts";
+
+const source = `component FunctionDefaults {
+ props { timezone = "UTC" }
+ state selected = ""
+ functions {
+  client function choose(section = "connections", hour = 9) { selected = section; return hour }
+  shared function label(prefix = "event", suffix = prefix + " details", zone = timezone) { return [prefix, suffix, zone] }
+ }
+ view { <button @click="choose()">Choose</button> }
+}`;
+test("browser functions retain defaults, prior-argument references and prop references", () => {
+  const module = generateBrowserModule(parse(source));
+  const functions = new Function(
+    module.replace(/\bexport\s+(?=const|function)/g, "") + ";return __wrnexusClientFunctions;",
+  )();
+  const context = {
+    state: { selected: "" },
+    props: { timezone: "Asia/Kolkata" },
+    batch: (apply: () => void) => apply(),
+  };
+  expect(functions.choose(context)).toBe(9);
+  expect(context.state.selected).toBe("connections");
+  expect(functions.label(context)).toEqual(["event", "event details", "Asia/Kolkata"]);
+  expect(functions.label(context, "meeting")).toEqual([
+    "meeting",
+    "meeting details",
+    "Asia/Kolkata",
+  ]);
+  expect(functions.choose(context, undefined, 0)).toBe(0);
+  expect(functions.label(context, null, "explicit", "UTC")).toEqual([null, "explicit", "UTC"]);
+});