test: remove unnecessary wrapping of parameter vector

Author: AayushSabharwal

test/function_registration.jl

@@ -22,7 +22,7 @@ sys = complete(sys)
 fun = ODEFunction(sys)
 
 u0 = 5.0
-@test fun([0.5], [u0], 0.0) == [do_something(u0) * 2]
+@test fun([0.5], u0, 0.0) == [do_something(u0) * 2]
 end
 
 # TEST: Function registration in a nested module.
@@ -45,7 +45,7 @@ sys = complete(sys)
 fun = ODEFunction(sys)
 
 u0 = 3.0
-@test fun([0.5], [u0], 0.0) == [do_something_2(u0) * 2]
+@test fun([0.5], u0, 0.0) == [do_something_2(u0) * 2]
 end
 end
 
@@ -67,7 +67,7 @@ sys = complete(sys)
 fun = ODEFunction(sys)
 
 u0 = 7.0
-@test fun([0.5], [u0], 0.0) == [do_something_3(u0) * 2]
+@test fun([0.5], u0, 0.0) == [do_something_3(u0) * 2]
 
 # TEST: Function registration works with derivatives.
 # ---------------------------------------------------
@@ -106,7 +106,7 @@ end
 function run_test()
     fun = build_ode()
     u0 = 10.0
-    @test fun([0.5], [u0], 0.0) == [do_something_4(u0) * 2]
+    @test fun([0.5], u0, 0.0) == [do_something_4(u0) * 2]
 end
 run_test()
 

test/input_output_handling.jl

@@ -145,9 +145,9 @@ if VERSION >= v"1.8" # :opaque_closure not supported before
             inputs = [torque.tau.u])
         x = randn(size(A, 1))
         u = randn(size(B, 2))
-        p = (getindex.(
+        p = getindex.(
             Ref(ModelingToolkit.defaults_and_guesses(ssys)),
-            parameters(ssys)),)
+            parameters(ssys))
         y1 = obsf(x, u, p, 0)
         y2 = C * x + D * u
         @test y1[] ≈ y2[]