import { expect, test } from "bun:test";

test("a short CLI exits while its version updater remains pending", async () => {
  const moduleUrl = new URL("../../lib/version-update.ts", import.meta.url)
    .href;
  const script = `
    const { createVersionObserver } = await import(${JSON.stringify(moduleUrl)});
    createVersionObserver({
      currentVersion: "2.6.1-rc3",
      runner: () => new Promise(() => {}),
    })("2.7.0");
  `;
  const child = Bun.spawn([process.execPath, "-e", script], {
    stdin: "ignore",
    stdout: "pipe",
    stderr: "pipe",
  });
  const exit = await Promise.race([
    child.exited,
    new Promise<never>((_, reject) =>
      setTimeout(() => reject(new Error("short CLI stayed alive")), 1_000),
    ),
  ]);

  expect(exit).toBe(0);
  expect(await new Response(child.stderr).text()).toBe("");
});

test.each([
  ["success", "return true", "+ Updated to 2.7.0"],
  ["failure", "throw new Error('install failed')", "+ New version available: 2.7.0"],
])("reports exactly one %s outcome when it settles", async (_name, outcome, message) => {
  const moduleUrl = new URL("../../lib/version-update.ts", import.meta.url).href;
  const script = `
    const { createVersionObserver } = await import(${JSON.stringify(moduleUrl)});
    createVersionObserver({
      currentVersion: "2.6.1-rc3",
      runner: async () => { ${outcome}; },
    })("2.7.0");
    await new Promise((resolve) => setTimeout(resolve, 25));
  `;
  const child = Bun.spawn([process.execPath, "-e", script], {
    stdin: "ignore",
    stdout: "pipe",
    stderr: "pipe",
  });

  expect(await child.exited).toBe(0);
  const stderr = await new Response(child.stderr).text();
  expect(stderr.split("\n").filter((line) => line.includes(message))).toHaveLength(1);
});