tests: add a test

Suggested by #3476.
`nice_min_max_steps` behaves correctly.
7 jobs for feature-c/3476-graph-labels in 4 minutes and 36 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test Tools
passed #172229
test_tools

00:00:05

 
  Test Quality
passed #172230
web
code_quality

00:00:08

 
  Test Unit
passed #172231
web
test_browser_unit

00:00:08

 
  Deploy Review
passed #172232
web
deploy_review

00:00:07

passed #172233
web allowed to fail manual
stop_deploy_review

00:00:03

 
  Test Functional
passed #172234
web
test_browser-functional

00:02:24

 
  Test Functional External
passed #172235
web
test_browser-functional-external

00:01:38