test: add validation tests for liveReload option

[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?

Yes

Motivation / Use-Case

add validation test for liveReload option.

Breaking Changes

None

Additional Info

No

[codecov]

Codecov Report

Merging #3718 (ef6294a) into master (f563d1d) will increase coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3718      +/-   ##
==========================================
+ Coverage   93.20%   93.35%   +0.15%     
==========================================
  Files          15       15              
  Lines        1324     1324              
  Branches      458      458              
==========================================
+ Hits         1234     1236       +2     
+ Misses         83       81       -2     
  Partials        7        7              

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

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