add sanity check for interpolation used

SciML · Nov 29, 2023 · b5e768d · b5e768d
1 parent e7fb077
commit b5e768d
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/test/interface/algebraic_interpolation.jl b/test/interface/algebraic_interpolation.jl
@@ -1,4 +1,5 @@
 using OrdinaryDiffEq
+using DiffEqBase
 using Test
 function rober_ip(du, u, p, t)
     y₁, y₂, y₃ = u
@@ -32,6 +33,13 @@ ref_op = solve(prob_op, Rodas5P(), reltol = 1e-8, abstol = 1e-8)
 sol_ip = solve(prob_ip, FBDF(), reltol = 1e-8, abstol = 1e-8)
 sol_op = solve(prob_op, FBDF(), reltol = 1e-8, abstol = 1e-8)
 
+# make sure interpolation changes don't accidentally break this test suite
+# the intention is that ref uses a stiffness-aware interpolation, while sol uses hermite
+@test DiffEqBase.interp_summary(sol_ip) == "3rd order Hermite"
+@test DiffEqBase.interp_summary(sol_op) == "3rd order Hermite"
+@test occursin("stiffness-aware", DiffEqBase.interp_summary(ref_ip))
+@test occursin("stiffness-aware", DiffEqBase.interp_summary(ref_op))
+
 reltol = 1e-4
 abstol = 1e-4
 t = 1