From 1e76d382507277f7d65359c8f7c6a4855dc4ffc2 Mon Sep 17 00:00:00 2001
From: Oscar Dowson <o.dowson@gmail.com>
Date: Mon, 16 Mar 2026 14:20:37 +1300
Subject: [PATCH 1/3] [Test] add a new test for solving a multiobjective
 problem

---
 src/Test/test_multiobjective.jl | 46 +++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/src/Test/test_multiobjective.jl b/src/Test/test_multiobjective.jl
index d8b64735e9..6e5df47e47 100644
--- a/src/Test/test_multiobjective.jl
+++ b/src/Test/test_multiobjective.jl
@@ -379,3 +379,49 @@ function test_multiobjective_vector_nonlinear_modify(
 end
 
 version_added(::typeof(test_multiobjective_vector_nonlinear_modify)) = v"1.19.0"
+
+function test_multi_objective_solve_and_objective_value(
+    model::MOI.ModelLike,
+    ::Config{T},
+) where {T}
+    F = MOI.VectorAffineFunction{T}
+    @requires _supports(config, MOI.optimize!)
+    @requires MOI.supports(model, MOI.ObjectiveFunction{F}())
+    x = MOI.add_variables(model, 3)
+    MOI.add_constraint.(model, x, MOI.Interval(zero(T), one(T)))
+    f = sum(one(T) * x[i] for i in 1:3)
+    MOI.add_constraint(model, f, MOI.LessThan(T(2)))
+    g = MOI.Utilities.vectorize([
+        T(3) * x[1],
+        T(3) * x[1] + T(1) * x[2] + T(2) * x[3],
+    ])
+    MOI.set(model, MOI.ObjectiveSense(), MOI.MAX_SENSE)
+    MOI.set(model, MOI.ObjectiveFunction{typeof(g)}(), g)
+    MOI.optimize!(model)
+    @test MOI.get(model, MOI.ResultCount()) > 0
+    for i in 1:MOI.get(model, MOI.ResultCount())
+        y = MOI.Utilities.eval_variables(model, g) do xi
+            return MOI.get(model, MOI.VariablePrimal(i), xi)
+        end
+        @test isapprox(MOI.get(model, MOI.ObjectiveValue()), y)
+    end
+    return
+end
+
+function setup_test(
+    ::typeof(test_multi_objective_solve_and_objective_value),
+    model::MOIU.MockOptimizer,
+    ::Config{T},
+) where {T}
+    MOIU.set_mock_optimize!(
+        model,
+        mock -> MOIU.mock_optimize!(
+            mock,
+            MOI.OPTIMAL,
+            (MOI.FEASIBLE_POINT, T[1, 0, 1]),
+        ),
+    )
+    return
+end
+
+version_added(::typeof(test_multiobjective_vector_nonlinear_modify)) = v"1.50.0"

From 3b079b84e711be885bf9ff516bf55b61d22578d1 Mon Sep 17 00:00:00 2001
From: Oscar Dowson <o.dowson@gmail.com>
Date: Mon, 16 Mar 2026 14:33:45 +1300
Subject: [PATCH 2/3] Update

---
 src/Test/test_multiobjective.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Test/test_multiobjective.jl b/src/Test/test_multiobjective.jl
index 6e5df47e47..6a4aec7bc1 100644
--- a/src/Test/test_multiobjective.jl
+++ b/src/Test/test_multiobjective.jl
@@ -424,4 +424,6 @@ function setup_test(
     return
 end
 
-version_added(::typeof(test_multiobjective_vector_nonlinear_modify)) = v"1.50.0"
+function version_added(::typeof(test_multi_objective_solve_and_objective_value))
+    return v"1.50.0"
+end

From b5ee88c705f6a39ce2696b35eaeb2a7bffc35f2c Mon Sep 17 00:00:00 2001
From: Oscar Dowson <o.dowson@gmail.com>
Date: Mon, 16 Mar 2026 15:18:21 +1300
Subject: [PATCH 3/3] Update

---
 src/Test/test_multiobjective.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Test/test_multiobjective.jl b/src/Test/test_multiobjective.jl
index 6a4aec7bc1..b8f2a63539 100644
--- a/src/Test/test_multiobjective.jl
+++ b/src/Test/test_multiobjective.jl
@@ -382,7 +382,7 @@ version_added(::typeof(test_multiobjective_vector_nonlinear_modify)) = v"1.19.0"
 
 function test_multi_objective_solve_and_objective_value(
     model::MOI.ModelLike,
-    ::Config{T},
+    config::Config{T},
 ) where {T}
     F = MOI.VectorAffineFunction{T}
     @requires _supports(config, MOI.optimize!)