Add more tests for imported array/dictionary value type conformance

[SupunS]

Work towards #870

Description

Add more tests to check the type conformance of imported nested arrays/dictionaries.

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• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #1045 (1503e7e) into feature/container-static-types (3cfe0f1) will not change coverage.
The diff coverage is n/a.

@@                       Coverage Diff                       @@
##           feature/container-static-types    #1045   +/-   ##
===============================================================
  Coverage                           73.47%   73.47%           
===============================================================
  Files                                 271      271           
  Lines                               34003    34003           
===============================================================
  Hits                                24984    24984           
  Misses                               7882     7882           
  Partials                             1137     1137           

Flag	Coverage Δ
unittests	73.47% <ø> (ø)

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