[ADF-5014] unit tests are added for using date fields as visibility conditions

[Qetikv]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:
  Unit tests

What is the current behaviour? (You can also link to an open issue here)

https://alfresco.atlassian.net/browse/ADF-5014

What is the new behaviour?

Unit tests are added for using date fields as visibility conditions

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[CLAassistant]

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[eromano]

Well done @Qetikv for your first unit test! 🎄 🎅