fix: fuse map and add to runtests

Author: vyudu

src/symbolic_indexing.jl

@@ -193,10 +193,11 @@ function SymbolicIndexingInterface.is_observed(sys::PartitionedGraphSystem, sym)
 end
 
 function SymbolicIndexingInterface.observed(sys::PartitionedGraphSystem, syms::Union{Vector{Symbol}, Tuple{Vararg{Symbol}}})
-    fs = map(syms) do sym
-        observed(sys, sym)
+    function (u, p, t)
+        map(syms) do sym
+            observed(sys, sym)(u, p, t)
+        end
     end
-    obs = map(f -> f(u, p, t), fs)
 end
 
 function SymbolicIndexingInterface.observed(sys::PartitionedGraphSystem, sym)

test/runtests.jl

@@ -5,3 +5,7 @@ using SafeTestsets
     solution_solve_test()
     sensitivity_test()
 end
+
+@safetestset "SII" begin
+    include("symbolic_indexing.jl")
+end

test/symbolic_indexing.jl

@@ -1,4 +1,5 @@
-include("test/particle_osc_example.jl")
+include("particle_osc_example.jl")
+using SymbolicIndexingInterface
 
 @testset "Symbolic Indexing of Vectors" begin
     sol = solve_particle_osc(x1=1.0, x2=-1.0)