Fix tests in MOI wrapper

[odow]

No description provided.

[codecov]

Codecov Report

Base: 93.00% // Head: 93.23% // Increases project coverage by +0.23% 🎉

Coverage data is based on head (370c764) compared to base (b9d2581).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #145      +/-   ##
==========================================
+ Coverage   93.00%   93.23%   +0.23%     
==========================================
  Files          12       12              
  Lines         672      710      +38     
==========================================
+ Hits          625      662      +37     
- Misses         47       48       +1     

Impacted Files	Coverage Δ
src/MOI_wrapper.jl	92.52% <ø> (+0.13%)	⬆️
src/add_dual_cone_constraint.jl	100.00% <ø> (ø)
src/constrained_variables.jl	100.00% <ø> (ø)
src/dual_equality_constraints.jl	91.03% <ø> (-0.02%)	⬇️
src/dual_model_variables.jl	86.27% <ø> (+1.16%)	⬆️
src/dual_names.jl	75.00% <ø> (ø)
src/dual_sets.jl	100.00% <ø> (ø)
src/dualize.jl	96.66% <ø> (+0.17%)	⬆️
src/objective_coefficients.jl	98.07% <ø> (+0.16%)	⬆️
src/structures.jl	100.00% <ø> (ø)
... and 9 more

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