test(box/file): extend the mocha timeout to prevent the async file read test from failing

[yoshinorin]

What does it do?

As shown in the logs below, we occasionally face an issue where the file async read test fails due to a timeout. This PR extends the timeout for the file test to 20000ms.

  1) File
       "before all" hook for "read()":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/home/runner/work/hexo/hexo/test/scripts/box/file.ts)
      at createTimeoutError (/home/runner/work/hexo/hexo/node_modules/mocha/lib/errors.js:498:15)
      at Hook.Runnable._timeoutError (/home/runner/work/hexo/hexo/node_modules/mocha/lib/runnable.js:429:10)
      at done (/home/runner/work/hexo/hexo/node_modules/mocha/lib/runnable.js:306:18)
      at /home/runner/work/hexo/hexo/node_modules/mocha/lib/runnable.js:369:11

P.S:

If we are allowed to change the timeout setting for the entire test, we can also specify the --timeout option for the mocha command.

Screenshots

N/A

Pull request tasks

• Add test cases for the changes.
• Passed the CI test.

[github-actions]

How to test

git clone -b test/change-box-file-timeout https://github.com/hexojs/hexo.git
cd hexo
npm install
npm test

[yoshinorin]

Another test started failing on Ubuntu & Node.js 22... 😢

---

P.S:

However, the above error is occurring in other PRs as well. At the very least, I believe this PR is effective as a response to the timeout issue in file async reads.

[uiolee]

I've tried this before, increasing the timeout length may have alleviated the problem, but it didn't really solve the problem.
But I haven't figured out why yet.