Test suite is failing locally

[vitvakatu]

Hello, I would like to contribute to the repository, but I found that some tests in the tests suite are failing when running locally.

• in Firefox, when opening tests/index.html, there is a failure in one of socket feature tests
• in Chrome, in tests/index.html, all cookies tests are failing, and the sockets test as well (4 in total)
• when running in CLI through npm test, 11 tests are failing

1) _hyperscript bootstrapping
       "before each" hook for "on a single div":
     TypeError: Cannot set properties of null (setting 'innerHTML')
      at clearWorkArea (util/util.js:58:26)
      at Context.<anonymous> (core/bootstrap.js:3:3)

  2) _hyperscript bootstrapping
       "after each" hook for "on a single div":
     TypeError: Cannot set properties of null (setting 'innerHTML')
      at clearWorkArea (util/util.js:58:26)
      at Context.<anonymous> (core/bootstrap.js:6:3)

  3) the on feature
       can queue events:
     Uncaught Error: Script error. (:0)


  4) the on feature
       can queue events:
     Error: global leak(s) detected: 'increment'


  5) the on feature
       async exceptions don't kill the event queue:
     Uncaught Error: Script error. (:0)


  6) the worker feature
       can define a basic no arg function in a worker:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  7) the worker feature
       can define a basic no arg function in a worker:
     Error: global leak(s) detected: 'example'


  8) the socket feature
       can handle different url schemes:
     AssertionError: No scheme: Should not have thrown
      at Context.<anonymous> (features/socket.js:27:12)

  9) the cookies identifier
       basic set cookie values work:
     TypeError: Cannot read properties of undefined (reading 'should')
      at Context.<anonymous> (expressions/cookies.js:15:10)

  10) the cookies identifier
       update cookie values work:
     TypeError: Cannot read properties of undefined (reading 'should')
      at Context.<anonymous> (expressions/cookies.js:21:10)

  11) the cookies identifier
       iterate cookies values work:

      AssertionError: expected false to equal true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (expressions/cookies.js:38:37)

Am I doing anything wrong? What is the correct way of testing hyperscript locally?