ConstValueDist Tests

[sthayashi]

• [ ] Cleanup code
• [x] Add sampler test
• [x] Fix unexpected behavior? For example, is it expected that this works?

  univariate_cvd = ConstValueDist( (a=Normal(),) )
  fill_array_of_normal_dists = rand(univariate_cvd, 10^5)

[codecov[bot]]

Codecov Report

Merging #39 (686fcd2) into master (37878f0) will increase coverage by 1.21%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
+ Coverage   92.75%   93.97%   +1.21%     
==========================================
  Files          13       13              
  Lines         649      647       -2     
==========================================
+ Hits          602      608       +6     
+ Misses         47       39       -8     

Impacted Files	Coverage Δ
src/value_shape.jl	91.66% <0.00%> (+3.66%)	:arrow_up:
src/const_value_dist.jl	97.05% <0.00%> (+17.64%)	:arrow_up:

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[sthayashi]

Test for Distributions.quantile not added. Not sure if it will change in the future.

[oschulz]

Is this ready to be merged?

[sthayashi]

Yes