lib/stateを使用しているテストでmockを使用するよう修正

[hakatashi]

Jestの open handle error が表示される確率が下がります。たぶん

↓こういうの

$ npm test -- achievements

> slackbot@1.0.0 test
> jest --verbose --detectOpenHandles --forceExit achievements

 PASS  achievements/achievements.test.ts (20.418 s)
  achievements
    ✓ all ids are unique (10 ms)
    ✓ all titles are unique (1 ms)
    ✓ no isolated category exists (10 ms)
    ✓ value is defined if counter is defined (21 ms)

 PASS  achievements/index_production.test.ts
  achievements
    ✓ unlock chat achievement when chat is posted (18 ms)

Test Suites: 2 passed, 2 total
Tests:       5 passed, 5 total
Snapshots:   0 total
Time:        21.666 s, estimated 22 s
Ran all test suites matching /achievements/i.

Jest has detected the following 1 open handle potentially keeping Jest from exiting:

  ●  Timeout

      31 | };
      32 |
    > 33 | schedule.scheduleJob('0 * * * *', (date) => {
         |          ^
      34 |         logger.info(`Firestore usage at ${date}: ${inspect(usageCount)}`);
      35 |         usageCount.clear();
      36 | });

      at Timeout.Object.<anonymous>.Timeout.start (node_modules/long-timeout/index.js:41:20)
      at new Timeout (node_modules/long-timeout/index.js:22:8)
      at Object.<anonymous>.exports.setTimeout (node_modules/long-timeout/index.js:5:10)
      at runOnDate (node_modules/node-schedule/lib/Invocation.js:224:13)
      at prepareNextInvocation (node_modules/node-schedule/lib/Invocation.js:251:33)
      at scheduleInvocation (node_modules/node-schedule/lib/Invocation.js:234:3)
      at scheduleNextRecurrence (node_modules/node-schedule/lib/Invocation.js:334:3)
      at Job.Object.<anonymous>.Job.schedule (node_modules/node-schedule/lib/Job.js:218:11)
      at Object.scheduleJob (node_modules/node-schedule/lib/schedule.js:39:11)
      at Object.<anonymous> (lib/state.ts:33:10)
      at Object.<anonymous> (achievements/index_production.ts:11:1)
      at Object.<anonymous> (achievements/index_production.test.ts:8:1)

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.02% ⚠️

Comparison is base (adaa6fa) 23.32% compared to head (2cb8f74) 23.31%.
Report is 1 commits behind head on master.

❗ Current head 2cb8f74 differs from pull request most recent head 8c2a4db. Consider uploading reports for the commit 8c2a4db to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #844      +/-   ##
==========================================
- Coverage   23.32%   23.31%   -0.02%     
==========================================
  Files         173      173              
  Lines       15264    15264              
  Branches     3489     3489              
==========================================
- Hits         3561     3559       -2     
- Misses      10296    10298       +2     
  Partials     1407     1407              

see 3 files with indirect coverage changes

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