test: fixes

[viceice]

Changes

fix tests

Context

• jest.resetAllMocks() now resets spy's, so don't reset if nor required
• if a spy has no mock implementation, it calls the original

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository