Unit tests for routers/repo/issue_label

[ethantkoenig]

Adds unit tests for routers/repo/issue_label.go. Also a little bit of refactoring to reuse test utility functions.

[codecov-io]

Codecov Report

Merging #3198 into master will increase coverage by 0.37%.
The diff coverage is 39.13%.

@@            Coverage Diff             @@
##           master    #3198      +/-   ##
==========================================
+ Coverage   34.51%   34.89%   +0.37%     
==========================================
  Files         276      277       +1     
  Lines       39975    39980       +5     
==========================================
+ Hits        13799    13951     +152     
+ Misses      24198    24015     -183     
- Partials     1978     2014      +36

Impacted Files	Coverage Δ
routers/repo/issue.go	32.9% <0%> (+1%)	⬆️
modules/test/context_tests.go	0% <0%> (ø)	⬆️
routers/repo/issue_label.go	45.92% <100%> (+40.17%)	⬆️
modules/test/utils.go	100% <100%> (ø)
models/unit_tests.go	78.02% <30.76%> (-6.98%)	⬇️
models/repo_indexer.go	51.94% <0%> (-0.49%)	⬇️
models/repo.go	41.47% <0%> (+0.18%)	⬆️
models/repo_list.go	67.18% <0%> (+1.56%)	⬆️
... and 4 more

---

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 bde0409...3199a6c. Read the comment docs.

[sapk]

LGTM

[lafriks]

Why did I add label bug? :)) LGTM