added one more unit test for the JuMP conversion

Author: gkantsidis

test/test_jump.jl

@@ -59,4 +59,21 @@ const aoc_moi = AOCoptimizer.MOI
     end
 end
 
+@testset verbose=verbose "Test JuMP conversions" begin
+    @testset "Compute objective function correctly" begin
+        model = Model(aoc_moi.Optimizer[])
+        @variable(model, x, Bin)
+        @variable(model, y, Bin)
+        @variable(model, -1 <= z <= 5)
+        @objective(model, Min, x - y * z)
+
+        optimize!(model)
+
+        @test value(x) ∈ [0, 1]
+        @test value(y) ∈ [0, 1]
+        @test -1 ≤ value(z) ≤ 5
+        @test objective_value(model) ≈ value(x) - value(y) * value(z)
+    end
+end
+
 end # module