Fixed minor errors in unit tests (mostly typing)

[ntziolis]

Description

A number of unit tests contained minor errors (mostly typing and missing parameters). These are resolved now.

Fixes #1901

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

All existing unit tests were successfully executed.

Test Environment:

• OS: Windows
• NodeJS: 12.18.3

Checklist:

• I have followed the CONTRIBUTING doc and the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests and linter rules pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Further comments

It might be worth adding the appropriate transforms to the jest config to ensure unit tests fail when such errors are checked in.

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[ardatan]

Thank you @ntziolis !