Fix error message because of macro

[kdheepak]

Related to #125

[codecov]

Codecov Report

Merging #126 (3d067d6) into master (e325c68) will increase coverage by 0.42%.
The diff coverage is 64.70%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage   52.22%   52.64%   +0.42%     
==========================================
  Files           9        9              
  Lines        3839     3850      +11     
==========================================
+ Hits         2005     2027      +22     
+ Misses       1834     1823      -11     

Impacted Files	Coverage Δ
src/api.jl	20.86% <37.50%> (+0.10%)	⬆️
src/utils.jl	87.09% <83.33%> (+27.09%)	⬆️
src/helper.jl	44.44% <100.00%> (+1.83%)	⬆️
src/license.jl	72.72% <100.00%> (+1.29%)	⬆️
src/lib.jl	9.94% <0.00%> (+0.46%)	⬆️

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[kdheepak]

Tests pass for me locally.

However I don't know if this error case is being tested. Does anyone know how to make one of the Lib.XPRS... functions fail consistently so that we can add it as a test?

[kdheepak]

I've added a test that always fails.

    prob = Xpress.XpressProblem()
    @test_throws Xpress.XpressError Xpress.copyprob(prob, prob)

It would be nice to test that the error message string contains 91 Error: No problem has been input but I think this is fine for now. If anyone knows how to do that I can update the test.

[rafabench]

I've added a test that always fails.

    prob = Xpress.XpressProblem()
    @test_throws Xpress.XpressError Xpress.copyprob(prob, prob)

It would be nice to test that the error message string contains 91 Error: No problem has been input but I think this is fine for now. If anyone knows how to do that I can update the test.

I think this is a way to test this Xpress error.

msg = "Unable to call `Xpress.copyprob`:\n\n91 Error: No problem has been input.\n"
@test_throws Xpress.XpressError(32,msg) Xpress.copyprob(prob, prob)

[kdheepak]

Thanks @rafabench I didn't know about that syntax! I guess I should have read the documentation 😅.

I've updated the PR.

[joaquimg]

Good for me!