Improving test coverage

[FredericWantiez]

Given all the changes on master that happened recently it would be good to improve the coverage a bit, especially on the PGAS and TracedRNG parts.

[FredericWantiez]

I plan to add more tests after this. This is mainly to clean up and remove TArray references

[coveralls]

Pull Request Test Coverage Report for Build 3353044103

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+31.4%) to 96.306%

---

Totals
Change from base Build 3353037959:	31.4%
Covered Lines:	365
Relevant Lines:	379

---

💛 - Coveralls

[codecov]

Codecov Report

Base: 64.94% // Head: 96.30% // Increases project coverage by +31.36% 🎉

Coverage data is based on head (7905882) compared to base (c99f920).
Patch has no changes to coverable lines.

❗ Current head 7905882 differs from pull request most recent head 455c2a4. Consider uploading reports for the commit 455c2a4 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #69       +/-   ##
===========================================
+ Coverage   64.94%   96.30%   +31.36%     
===========================================
  Files           7        6        -1     
  Lines         542      379      -163     
===========================================
+ Hits          352      365       +13     
+ Misses        190       14      -176     

Impacted Files	Coverage Δ
src/rng.jl	90.00% <ø> (-0.33%)	⬇️
src/smc.jl	98.07% <0.00%> (+25.52%)	⬆️

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[yebai]

thanks, @FredericWantiez - I'll merge this PR so we can finalise the Turing update. Please feel free to open another PR for more tests.