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import * as path from "$std/path/mod.ts";import { puppeteer } from "./deps.ts";import { assert } from "$std/_util/asserts.ts";import { startFreshServer, waitForText } from "$fresh/tests/test_utils.ts";
Deno.test("build snapshot and restore from it", async (t) => {  const fixture = path.join(Deno.cwd(), "tests", "fixture_build");  const outDir = path.join(fixture, "_fresh");
  try {    await t.step("build snapshot", async () => {      const res = await new Deno.Command(Deno.execPath(), {        args: [          "run",          "-A",          path.join(fixture, "dev.ts"),          "build",        ],        stdin: "null",        stdout: "piped",        stderr: "inherit",      }).output();
      const decoder = new TextDecoder();      const stdout = decoder.decode(res.stdout);      assert(        !/Using snapshot found at/.test(stdout),        "Using snapshot message was shown during build",      );
      assert((await Deno.stat(outDir)).isDirectory, "Missing output directory");    });
    await t.step("check snapshot file", async () => {      const snapshot = JSON.parse(        await Deno.readTextFile(path.join(outDir, "snapshot.json")),      );      assert(        Array.isArray(snapshot["island-counter_default.js"]),        "Island output file not found in snapshot",      );      assert(        Array.isArray(snapshot["main.js"]),        "main.js output file not found in snapshot",      );      assert(        Array.isArray(snapshot["signals.js"]),        "signals.js output file not found in snapshot",      );      assert(        Array.isArray(snapshot["deserializer.js"]),        "deserializer.js output file not found in snapshot",      );    });
    await t.step("restore from snapshot", async () => {      const { lines, serverProcess, address, output } = await startFreshServer({        args: [          "run",          "-A",          path.join(fixture, "./main.ts"),        ],      });
      // Check if restore snapshot message was printed      assert(        output.find((line) => line.includes("Using snapshot found at")),        "Did not print restoring from snapshot line",      );
      try {        const browser = await puppeteer.launch({ args: ["--no-sandbox"] });
        try {          const page = await browser.newPage();          await page.goto(address);
          await page.waitForSelector("button:not([disabled])");          await page.click("button");
          await waitForText(page, "p", "1");        } finally {          await browser.close();        }      } finally {        await lines.cancel();        serverProcess.kill("SIGTERM");        await serverProcess.status;      }    });  } finally {    await Deno.remove(path.join(fixture, "_fresh"), { recursive: true });  }});