clean up somewhat and use new MOI.Test tests

[chriscoey]

@blegat @odow what is the simplest way to select the right set of MOI.Test functions to include/exclude? With the first commit here, there are dozens of MOI test functions that fail - too many to list by hand. Many fail because Pavito errors on instances without integer/discrete constraints, but I don't know a simple way to exclude all instances without such constraints.

[odow]

Many fail because Pavito errors on instances without integer/discrete constraints

We don't have a way of doing this because it's a pretty uncommon ask. You'd have to manually exclude them. you can also partially match function names. So you could have exclude = ["test_nonlinear_"] to exclude all nonlinear-related tests.

[chriscoey]

Thanks. Given how many need to be excluded, could it make more sense to just list the ones to include? I assume that is what the "include = ..." is for.
Alternatively, I could make pavito not error when there are no discrete constraints, and just call the continuous solver. Not sure what makes the most sense.

[odow]

could it make more sense to just list the ones to include

Yes, that's what include is for.

I could make pavito not error when there are no discrete constraints, and just call the continuous solver.

This seems like the way to go.

[chriscoey]

Ok I'll try that. And should I do the module wrapping of MOI tests that I think I've seen in some other packages recently? Or is that not really important?

[odow]

It's not necessary, but putting thing in a module gets rid of a bunch of scoping and global variable issues (it's too common for tests to accidentally rely on data/variables set in other parts (or files) or the tests).

[codecov]

Codecov Report

Merging #43 (56d358d) into master (7847640) will increase coverage by 15.93%.
The diff coverage is 84.28%.

❗ Current head 56d358d differs from pull request most recent head 2bcf562. Consider uploading reports for the commit 2bcf562 to get more accurate results

@@             Coverage Diff             @@
##           master      #43       +/-   ##
===========================================
+ Coverage   69.82%   85.76%   +15.93%     
===========================================
  Files           3        4        +1     
  Lines         570      583       +13     
===========================================
+ Hits          398      500      +102     
+ Misses        172       83       -89     

Impacted Files	Coverage Δ
src/MOI_wrapper.jl	82.20% <75.47%> (-0.31%)	⬇️
src/optimize.jl	83.88% <83.88%> (ø)
src/cut_utils.jl	94.56% <94.56%> (ø)
src/infeasible_nlp.jl	100.00% <100.00%> (ø)

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[odow]

I haven't had a look through, but you may as well merge if the tests are passing. I'll take a better look this week once I've made the changes the MOI.