Fix backpressure

[akshaypatidar1999]

Summary

• Fix backpressure
• Use Assertj instead of hamcrest

Full changelog

• Implement backpressure
• Add backpressure tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (553c6cb) 88.05% compared to head (6c26ca0) 89.42%.

❗ Current head 6c26ca0 differs from pull request most recent head 3f3dff7. Consider uploading reports for the commit 3f3dff7 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #10      +/-   ##
============================================
+ Coverage     88.05%   89.42%   +1.37%     
- Complexity       77       78       +1     
============================================
  Files            19       19              
  Lines           226      227       +1     
  Branches         17       17              
============================================
+ Hits            199      203       +4     
+ Misses           16       13       -3     
  Partials         11       11              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.