Improve interface coverage

Author: BatyLeo

test/interface.jl

@@ -0,0 +1,27 @@
+using DecisionFocusedLearningBenchmarks
+using Random
+using Test
+
+@testset "AbstractBenchmark interface" begin
+    struct DummyBenchmark <: AbstractStaticBenchmark end
+    b = DummyBenchmark()
+    rng = MersenneTwister(1234)
+    @test_throws ErrorException generate_instance(b, rng)
+    @test_throws ErrorException generate_maximizer(b)
+    @test_throws ErrorException generate_maximizer(b; seed=0)
+    @test !has_visualization(b)
+
+    function DecisionFocusedLearningBenchmarks.generate_instance(
+        ::DummyBenchmark, rng::AbstractRNG
+    )
+        return DataSample(; x=rand(rng, 5))
+    end
+
+    dataset = generate_dataset(b, 10; seed=0)
+    @test length(dataset) == 10
+    @test all(x -> length(x.x) == 5, dataset)
+
+    struct DummyDynamicBenchmark <: AbstractDynamicBenchmark end
+    db = DummyDynamicBenchmark()
+    @test_throws ErrorException compute_gap(db)
+end

test/runtests.jl

@@ -8,6 +8,7 @@ using Random
     end
 
     include("utils.jl")
+    include("interface.jl")
 
     include("argmax.jl")
     include("argmax_2d.jl")

test/vsp.jl

@@ -7,6 +7,8 @@
 
     b = StochasticVehicleSchedulingBenchmark(; nb_tasks=25, nb_scenarios=10)
 
+    @test is_exogenous(b)
+
     N = 2
     K = 3