feat(step_definition): Allows to define step function without return.

[titouanfreville]

Issue: It is not possible to use function without return when
matching steps, resulting in a lot of Nil only error
returns.

Fix: Allows to provide empty result function by correctly matching
reflect Calls on step Handler.
When nothing is returned by the Handler, it will return
nil as if errors was nil.

[codecov]

Codecov Report

Merging #364 (cdbb0ac) into main (9a335ae) will increase coverage by 3.54%.
The diff coverage is 97.05%.

@@            Coverage Diff             @@
##             main     #364      +/-   ##
==========================================
+ Coverage   80.81%   84.35%   +3.54%     
==========================================
  Files          26       26              
  Lines        2033     2372     +339     
==========================================
+ Hits         1643     2001     +358     
+ Misses        287      278       -9     
+ Partials      103       93      -10     

Impacted Files	Coverage Δ
internal/models/stepdef.go	87.70% <95.00%> (+27.70%)	⬆️
test_context.go	96.00% <100.00%> (+37.46%)	⬆️
internal/models/results.go	92.30% <0.00%> (-3.35%)	⬇️
suite.go	90.72% <0.00%> (-0.19%)	⬇️
fmt.go	100.00% <0.00%> (ø)
formatters/fmt.go	100.00% <0.00%> (ø)
internal/flags/flags.go	100.00% <0.00%> (ø)
internal/models/feature.go	100.00% <0.00%> (ø)
internal/tags/tag_filter.go	100.00% <0.00%> (ø)
internal/formatters/fmt_base.go	86.33% <0.00%> (+0.15%)	⬆️
... and 18 more

---

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[titouanfreville]

Last commit add goconvey dependencies to simplify some unit test writting on Panics.

It can be rollbacked or adapt to keep the tests with a custom system if dependencies should not be added.

[mattwynne]

This needs re-basing before it can be merged. @vearutop could you help?

[vearutop]

@titouanfreville do you think this PR is ready to be merged?

[vearutop]

Let's wait for @titouanfreville response for couple more days, otherwise this PR looks good to me to merge.

[mattwynne]

I suggest updating the CHANGELOG as part of the PR, it's a good idea so you don't forget to do it after the merge.

[titouanfreville]

If there are no conflict, it should be ok to merge it.

I also used it to start a discution arround test tools but did not get any feedback on it.

I'll update the changelog ASAP before merging :)

[vearutop]

I'm not opposed to new testing tools (since it does not affect end-user much) if they help writing more reliable and readable tests, though not sure if goconvey brings better ergonomics compared to testify or testing that are already in use.

[vearutop]

Seems @titouanfreville is busy, so I updated README and CHANGELOG and going to merge this PR. If any additional changes are necessary, let's deliver them in a separate PR.