test: enable tests for webpack-dev-server@beta-1

[snitin315]

What kind of change does this PR introduce?
tests

Did you add tests for your changes?
yes
If relevant, did you update the documentation?
No
Summary

Does this PR introduce a breaking change?
No

Other information
No

[alexander-akait]

We need update snapshot resolver to include webpack-dev-server version too (otherwise snapshots will be broken), also some tests should be rewritten like isDevServer3 and isDevServer4

[alexander-akait]

I think we need snapshot resolver here, for webpack-dev-server v3 and webpack-dev-server v4, and for webpack v4 and v5

[snitin315]

Yep WIP.

[codecov]

Codecov Report

Merging #2573 (7d42899) into master (40b2c59) will increase coverage by 0.50%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2573      +/-   ##
==========================================
+ Coverage   95.20%   95.70%   +0.50%     
==========================================
  Files          30       30              
  Lines        1501     1491      -10     
  Branches      429      429              
==========================================
- Hits         1429     1427       -2     
+ Misses         72       64       -8     

Impacted Files	Coverage Δ
packages/serve/src/startDevServer.ts	91.22% <0.00%> (-1.76%)	⬇️
packages/webpack-cli/lib/webpack-cli.js	96.81% <0.00%> (+0.75%)	⬆️
packages/serve/src/index.ts	94.73% <0.00%> (+3.50%)	⬆️

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[alexander-akait]

Ideally we should run it on the next beta release (i.e. beta-2), I will do release and update snapshots, and all should work fine, thanks for helping

[alexander-akait]

I will finish it, anyway good job, big thanks

[alexander-akait]

Again, tests with changing directory and do not return to default state...

[alexander-akait]

@snitin315 Do you have idea where we have tests which change process.cwd()?

[snitin315]

No idea, from the logs it seems loader and plugin tests might be the culprits.

[anshumanv]

lets try to skip them and see if CI passes

[alexander-akait]

I can't understand which part of code change our cwd 😞

[alexander-akait]

Found it is in packages/generators/__tests__

@webpack/cli-team We need rewrite these test on standard tests, somebody want to help? We need do it in other PR

[alexander-akait]

due yeoman-test

[alexander-akait]

I just drop them to test it here

[anshumanv]

this shouldn't change

[anshumanv]

need to update some snapshots, I think it looks good now

[alexander-akait]

Merging is hell

[alexander-akait]

Hope all will be fine now and we can finish it, found some bug on webpack-dev-server side