test: use latest API methods

[snitin315]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

Motivation / Use-Case

use latest API methods

Breaking Changes

None

Additional Info

No

[codecov]

Codecov Report

Merging #3617 (079acd3) into master (ad0cdb4) will increase coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3617      +/-   ##
==========================================
+ Coverage   93.55%   93.70%   +0.15%     
==========================================
  Files          15       15              
  Lines        1318     1318              
  Branches      456      456              
==========================================
+ Hits         1233     1235       +2     
+ Misses         78       76       -2     
  Partials        7        7              

Impacted Files	Coverage Δ
lib/servers/WebsocketServer.js	97.14% <0.00%> (+5.71%)	⬆️

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[alexander-akait]

It is special test for old API, because we can't break it

[snitin315]

Are there any other instances we want to update? if not, I think we can close it.

[alexander-akait]

Need check please run test locally, ideally we should have only one test for old API (it is this test)

[snitin315]

I found a few instances in Server.test.js -

webpack-dev-server/test/server/Server.test.js

Lines 65 to 71 in 974ce25

	server.listen(port, "localhost", (error) => {
	if (error) {
	throw error;
	}
	getEntries(server);
	});

[alexander-akait]

Feel free to fix them

[snitin315]

I will update