WRNexusJS/examples/basic-app/app/example.test.ts

/**
 * Example WrNexus tests. Run with `wrnexus test` (or `bun test`).
 *
 *   - renderComponent: compile + render a .wrn component to HTML
 *   - callRoute:       call an API handler with a fake Request
 *   - createHarness:   boot the whole app on an ephemeral port and fetch real routes
 *
 * Everything comes from one import: `@wrnexus/test`.
 */
import {
  test,
  expect,
  describe,
  beforeAll,
  afterAll,
  renderComponent,
  callRoute,
  createHarness,
  type Harness,
} from "@wrnexus/test";

// --- Component-level (fast, no server) -------------------------------------

const COUNTER = `component Counter {
  props {
    start = 0
    label = "Count"
  }
  state count = start
  view { <button @click="count++">{label}: {count}</button> }
}`;

test("Counter renders its label and initial value", async () => {
  const html = await renderComponent(COUNTER, { start: 5, label: "Clicks" });
  expect(html).toContain("Clicks");
  expect(html).toContain("5");
});

// --- Route-level (fast, no server) -----------------------------------------

test("POST /api/echo echoes the JSON body", async () => {
  const { POST } = await import("./api/echo.ts");
  const res = await callRoute(
    POST,
    new Request("http://test/api/echo", {
      method: "POST",
      body: JSON.stringify({ hi: "there" }),
      headers: { "content-type": "application/json" },
    }),
  );
  expect(await res.json()).toEqual({ received: { hi: "there" } });
});

// --- App-level integration (real in-process server) ------------------------

describe("full app", () => {
  let app: Harness;
  beforeAll(async () => {
    app = await createHarness(import.meta.dir + "/..");
  });
  afterAll(() => app?.close());

  test("home page server-renders translated page and layout text", async () => {
    const res = await app.fetch("/");
    expect(res.status).toBe(200);
    expect(res.headers.get("content-type")).toContain("text/html");
    const html = await res.text();
    expect(html).toContain('<span data-t="nav.home">Home</span>');
    expect(html).toContain('<span data-t="home.title">Hello from WrNexus</span>');
    expect(html).not.toContain('<span data-t="nav.home"></span>');
  });

  test("home page ships only its active theme stylesheet", async () => {
    const response = await app.fetch("/");
    const html = await response.text();
    const href = html.match(/data-wrnexus-theme href="([^"]+)"/)?.[1];
    expect(href).toContain("/__wrnexus/theme/dark/");
    expect(html).not.toContain('href="/__wrnexus/theme.css');
    const cssResponse = await app.fetch(String(href));
    expect(cssResponse.status).toBe(200);
    const css = await cssResponse.text();
    expect(css.length).toBeLessThan(10_000);
    expect(css).not.toContain("[data-theme=");
  });

  test("GET /api/hello returns a translated greeting", async () => {
    const res = await app.fetch("/api/hello");
    expect(res.status).toBe(200);
    const body = (await res.json()) as { message: string; lang: string };
    expect(typeof body.message).toBe("string");
    expect(body.lang).toBeTruthy();
  });

  test("language-server playground renders its real interactive output", async () => {
    const res = await app.fetch("/language-tools");
    expect(res.status).toBe(200);
    const html = await res.text();
    expect(html).toContain("Language server playground");
    expect(html).toContain("computed double:");
    expect(html).toContain('data-text="doubled">0</span>');
    expect(html).toContain('aria-live="polite"');
  });

  test("login renders real accessible fields without an accidental Card component", async () => {
    const res = await app.fetch("/login?next=/dashboard");
    expect(res.status).toBe(200);
    const html = await res.text();
    expect(html).toContain('name="email"');
    expect(html).toContain('name="password"');
    expect(html).toContain('autocomplete="current-password"');
    expect(html).not.toContain("Card title");
  });

  test("shared UI foundations render on demand instead of shipping in ui.css", async () => {
    const fieldResponse = await app.fetch("/modal");
    expect(fieldResponse.status).toBe(200);
    const fieldHtml = await fieldResponse.text();
    expect(fieldHtml).toContain('data-wrnexus-style-owner="FieldStyles"');
    expect(fieldHtml).toContain('data-wrnexus-style-owner="ComponentBaseStyles"');
    const selectResponse = await app.fetch("/test");
    expect(selectResponse.status).toBe(200);
    expect(await selectResponse.text()).toContain('data-wrnexus-style-owner="SelectStyles"');
  });

  test("platform showcase uses the public layout and styled reactive primitives", async () => {
    const res = await app.fetch("/platform-showcase");
    expect(res.status).toBe(200);
    const html = await res.text();
    expect(html).toContain("WrNexus");
    expect(html).toContain('data-wrn-dynamic-component="Admin"');
    expect(html).toContain('data-wrn-portal="#showcase-modal"');
    expect(html).toContain("platform-showcase");
  });

  test("async data page renders its server loader without a cache failure", async () => {
    const res = await app.fetch("/async-data");
    expect(res.status).toBe(200);
    const html = await res.text();
    expect(html).toContain("Rendered by the server loader");
    expect(html).toContain("Loading the browser profile");
  });
});