Added tests for sample.dendrogram.R, colored_dots.R and colored_bars.R

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.50%. Comparing base (39191b4) to head (cd95eb5). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #142 +/- ## ========================================== + Coverage 77.81% 83.50% +5.68% ========================================== Files 50 50 Lines 4183 4183 ========================================== + Hits 3255 3493 +238 + Misses 928 690 -238 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.