[PXN-2880] - Implementation of unit tests

[samantaalbanez]

Changes:

• Adjustment of existing tests;
• Converting classes from java to kotlin;
• Implementation of new tests;
• Changes and implementations were performed using mockk

Changed packages:

• carddrawer/configuration
• carddrawer/utils
• carddrawer/model (partial)
• carddrawer/format

The other tests will be adjusted in a new task

[codecov-commenter]

Codecov Report

Merging #95 (17d447a) into master (c13494c) will increase coverage by 11.96%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #95       +/-   ##
===========================================
+ Coverage    0.00%   11.96%   +11.96%     
===========================================
  Files          14       14               
  Lines         703      702        -1     
  Branches       56       54        -2     
===========================================
+ Hits            0       84       +84     
+ Misses        703      618       -85     

Impacted Files	Coverage Δ
.../meli/android/carddrawer/model/CardDrawerView.java	0.00% <0.00%> (ø)
...n/java/com/meli/android/carddrawer/model/Card.java	100.00% <0.00%> (+100.00%)	:arrow_up:
...arddrawer/configuration/DarkFontConfiguration.java	100.00% <0.00%> (+100.00%)	:arrow_up:
...rddrawer/configuration/LightFontConfiguration.java	100.00% <0.00%> (+100.00%)	:arrow_up:
...drawer/configuration/DefaultFontConfiguration.java	100.00% <0.00%> (+100.00%)	:arrow_up:
...awer/configuration/shadow/ShadowConfiguration.java	100.00% <0.00%> (+100.00%)	:arrow_up:
...er/configuration/CardFontConfigurationFactory.java	100.00% <0.00%> (+100.00%)	:arrow_up:
.../configuration/shadow/ShadowFontConfiguration.java	100.00% <0.00%> (+100.00%)	:arrow_up:

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