Adds useful message when test panics on no return values

[mateusmarquezini]

Description

• Adds a useful message when the test panics on no return value.

• Fixes #729

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Version of Golang used when building/testing:

• [ ] 1.11
• [ ] 1.12
• [ ] 1.13
• [ ] 1.14
• [ ] 1.15
• [ ] 1.16
• [ ] 1.17
• [ ] 1.18
• [ ] 1.19
• [x] 1.20

How Has This Been Tested?

I tested by using Unit tests

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (c7a65e2) 75.25042% compared to head (d0fa1f9) 75.16639%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #736 +/- ## =================================================== - Coverage 75.25042% 75.16639% -0.08403% =================================================== Files 9 10 +1 Lines 2396 2404 +8 =================================================== + Hits 1803 1807 +4 - Misses 455 459 +4 Partials 138 138 ```

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[mateusmarquezini]

Awesome! Thanks for your patience and support @LandonTClipp!