test: add web hook test cases

[aeneasr]

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
  confirm that I got green light (please contact
  [email protected]) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

Merging #2051 (bd70fe9) into master (fd395f1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2051   +/-   ##
=======================================
  Coverage   74.93%   74.93%           
=======================================
  Files         293      293           
  Lines       15318    15318           
=======================================
  Hits        11478    11478           
  Misses       3012     3012           
  Partials      828      828           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fd395f1...bd70fe9. Read the comment docs.