chore(gatsby-plugin-preload-fonts): Use createContentDigest helper

[muescha]

Description

use createContentDigest

updated tests

Documentation

Related Issues

#8805 feat: update gatsby plugins to use new createContentDigest helper

[freiksenet]

Thank you for the PR! This looks fine, but unit tests are failing for node8.

[muescha]

need help

@freiksenet i need help to fix this

the problem with both failing test is that the new hashes are different on my local machine

steps i have done:

run test on Node 12

run test locally on v12.13.1 without errors

run test on Node 8

i and i also switched to Node v8.17:

$ nvm list
->      v8.17.0
       v10.15.3
       v12.13.1
        v13.0.1
        v13.1.0
         system
default -> v12.13.1
node -> stable (-> v13.1.0) (default)
stable -> 13.1 (-> v13.1.0) (default)
iojs -> N/A (default)
unstable -> N/A (default)
lts/* -> lts/erbium (-> N/A)
lts/argon -> v4.9.1 (-> N/A)
lts/boron -> v6.17.1 (-> N/A)
lts/carbon -> v8.17.0
lts/dubnium -> v10.18.0 (-> N/A)
lts/erbium -> v12.14.0 (-> N/A)
[09:29:49] muescha@Michaels-MacBook-Pro-2:~/Work/gatsby/github/gatsby/packages/gatsby-plugin-preload-fonts 

but still the tests passing with the new hashes:

$ jest

 RUNS  src/__tests__/fetch-routes.test.js

 RUNS  src/__tests__/fetch-routes.test.js

 RUNS  src/__tests__/fetch-routes.test.js
 PASS  src/__tests__/utils.test.js

 RUNS  src/__tests__/fetch-routes.test.js

 RUNS  src/__tests__/fetch-routes.test.js
 PASS  src/__tests__/cache.test.js

 RUNS  src/__tests__/fetch-routes.test.js
 PASS  src/__tests__/gatsby-ssr.test.js

 RUNS  src/__tests__/fetch-routes.test.js
 PASS  src/__tests__/index.test.js
  ● Console

    console.log src/prepare/logger.js:49
      undefined

 PASS  src/__tests__/logger.test.js
 PASS  src/__tests__/fetch-routes.test.js

Test Suites: 6 passed, 6 total
Tests:       20 passed, 20 total
Snapshots:   6 passed, 6 total
Time:        3.237s
Ran all test suites.

check master tests

• the test on master branch (without my changes) also run without errors

[pieh]

That's very weird, I'll take a look at this

[pieh]

Can you run yarn bootstrap in root of repository and try rerun tests again? I suspect that you might not have built gatsby-core-utils recently and if your built version is from before #19832 it could explain difference in generated hashes

(I get the same results as on CI locally)

As for node 8 vs other node versions - we just run this first and don't run more (potentially long) checks if it fails, so it doesn't mean that it's node version related issue

[muescha]

Ah ok. That was my idea with the node version

Good catch. That maybe is different. I will rerun bootrap again later and try it again

[muescha]

bootstrapped and now my local hashes the same as CI - now test run successful

thanks @pieh for help

failing tests are fixed

[pieh]

Thanks @muescha!