10514 fix coverage - 3

[michalstocki]

Changes:

1. To get rid of empty lines reported from reports created via nyc (integration tests) I simply changed --reporter=lcov to --reporter=clover
2. The hard part was when I realized that the built-in coverage reporting feature of Jest framework (http://facebook.github.io/jest/) is also reporting empty lines as uncovered (We use it for unit tests – those importing tested function explicitly). I tried to change format to clover but it didn’t helped. I realized that line numbers in the coverage report are referencing the JS output instead of the TypeScript souce. Hopefully I found the issue with a detailed description how to make Jest coverage working with TypeScript. Source map support jestjs/jest#336 (comment)
3. Finally I turn off the TypeScript support in Jest (when run on CI) and let it calculate coverage for JS files. Then I use reamp-istanbul via command line to remap the JS coverage to the TS source:

remap-istanbul -i coverage/coverage-final.json -o coverage/clover.xml -t clover

[bauerpl]

Codecov Report

Merging #12 into master will increase coverage by 24.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #12       +/-   ##
===========================================
+ Coverage   68.23%   92.59%   +24.35%     
===========================================
  Files           6        6               
  Lines          85       54       -31     
  Branches        7        4        -3     
===========================================
- Hits           58       50        -8     
+ Misses         25        3       -22     
+ Partials        2        1        -1

Flag	Coverage Δ
#unittests	?
#uxpin_code_cli	92.59% <ø> (?)

Impacted Files	Coverage Δ
...kages/uxpin-code-cli/src/components/isComponent.ts	100% <0%> (ø)	⬆️
...ackages/uxpin-code-cli/src/utils/asynchronousFS.ts	89.47% <0%> (+1.01%)	⬆️
...ages/uxpin-code-cli/src/getDesignSystemMetadata.ts	50% <0%> (+25%)	⬆️
...rc/components/getDesignSystemComponentLocations.ts	95.23% <0%> (+37.66%)	⬆️
...kages/uxpin-code-cli/src/getDesignSystemSummary.ts	100% <0%> (+42.85%)	⬆️
packages/uxpin-code-cli/src/index.ts	100% <0%> (+66.66%)	⬆️

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[jaroslawsawicki]

:notbad: