(Improvement) Add more tests to server-lib files

[garatortiz]

• What is it? (leave one option)

  • (Improvement) of existing functionality

• What was the root cause of the problem originally / what feature was missing? This PR adds more tests to server-lib files, and increases the value of coverage

• How does this pull request solve it (in broad terms)? Add tests

• Does it close any open issues? Closes @20

• Quick checklist

  • [x] eslint shows no errors

    cd web-dapp
    eslint .

  • [x] docs were updated where necessary OR they don't need to be updated
  • [x] tests were updated where necessary OR they don't need to be updated

• Additional information

[coveralls]

Pull Request Test Coverage Report for Build 81

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.1%) to 23.635%

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Totals
Change from base Build 77:	2.1%
Covered Lines:	233
Relevant Lines:	974

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💛 - Coveralls