num cuts as attribute

Author: matbesancon

src/MOI_wrapper.jl

@@ -136,3 +136,15 @@ end
 function MOI.get(opt::Optimizer, ::MOI.NodeCount)
     return MOI.get(opt.oa_model, MOI.NodeCount())
 end
+
+"""
+    NumberOfCuts
+
+Number of cuts added to the outer approximation model.
+"""
+struct NumberOfCuts <: MOI.AbstractOptimizerAttribute
+end
+
+function MOI.get(opt::Optimizer, ::NumberOfCuts)
+    return opt.num_cuts
+end

test/JuMP_tests.jl

@@ -69,9 +69,18 @@ function run_jump_tests(
         println(inst)
         inst(opt)
     end
+    run_cut_test(_soc1, opt)
+    run_cut_test(_expdesign, opt)
     return
 end
 
+function run_cut_test(test_function, opt)
+    MOI.empty!(opt)
+    @test MOI.get(opt, Pajarito.NumberOfCuts()) == 0   
+    test_function(opt)
+    @test MOI.get(opt, Pajarito.NumberOfCuts()) > 0
+end
+
 function _soc1(opt)
     TOL = 1e-4
     m = JuMP.Model(opt)