I am new to unit testing and planning to write unit test cases but not E-2-E for the below mentioned scenario and playgrounnd link for scenario is at the bottom
sum-of-digits
rethinkdb-go
udpipe
repeater
typescript2.9
nimbus
jquery-ui-tabs
knox-amazon-s3-client
specialized-annotation
laravel-lighthouse
include-what-you-use
fancybox
ios-simulator
code-sharing
bash-trap
sybase-rs
cross-validation
int
use-effect
delivery-status-notification
guzzle-service-description
remote-actors
gml
delphi-10.3-rio
delphi-xe2
httpurlconnection
gpgme
magic-command
phonegap-cli
error-suppression