import { describe, expect, it } from "vitest";

type Result<T, E> =
  | Readonly<{ ok: true; value: T }>
  | Readonly<{ ok: false; error: E }>;

function summarize(result: Result<number, string>): string {
  return result.ok ? String(result.value) : result.error;
}

describe("TypeScript test tooling", () => {
  it("type-checks and executes discriminated unions in the test project", () => {
    expect(summarize({ ok: true, value: 42 })).toBe("42");
    expect(summarize({ ok: false, error: "failed" })).toBe("failed");
  });
});