Fix jest unit tests

[herzog31]

Description

• Fix jest unit tests of react-components subproject.

Screenshots (if appropriate):

Types of changes

• [X] 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 change)

Checklist:

• [X] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [X] I have added tests to cover my changes and the overall coverage did not decrease.
• [X] All unit tests pass on CircleCi.
• [X] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #983 (dcf5b1d) into master (aa48a3b) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #983   +/-   ##
=========================================
  Coverage     89.15%   89.15%           
  Complexity     2212     2212           
=========================================
  Files           354      354           
  Lines          9987     9987           
  Branches       1438     1438           
=========================================
  Hits           8904     8904           
  Misses          787      787           
  Partials        296      296           

Flag	Coverage Δ
integration	51.78% <ø> (ø)
jest	86.68% <ø> (ø)
karma	95.53% <ø> (ø)
unittests	87.43% <ø> (ø)

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