Use SciMLTesting v1.0.0 (run_tests harness)

Replace the hand-written GROUP-dispatch in test/runtests.jl with a single
declarative `run_tests` call from SciMLTesting v1.0.0. Pure harness refactor:
the Core and QA (Aqua) test bodies are preserved verbatim (behavior-equivalent),
only the dispatch boilerplate changes. QA is passed via the `qa` kwarg so it
runs under both GROUP=QA and the "All" default, matching the original
`GROUP == "QA" || GROUP == "All"` dispatch.

Project.toml: add SciMLTesting to [extras]/[targets].test/[compat]. (No Pkg
entry to remove here; the old harness did not use Pkg.)

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

Project.toml

@@ -36,6 +36,7 @@ SafeTestsets = "0.1"
 SciCompDSL = "1"
 SciMLBase = "2, 3"
 SciMLStructures = "1.7.0"
+SciMLTesting = "1"
 SymbolicIndexingInterface = "0.3.39"
 Symbolics = "7.4.1"
 Test = "1"
@@ -60,8 +61,9 @@ SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
 SciCompDSL = "91a8cdf1-4ca6-467b-a780-87fda3fff15e"
 SciMLBase = "0bca4576-84f4-4d90-8ffe-ffa030f20462"
 SciMLStructures = "53ae85a6-f571-4167-b2af-e1d143709226"
+SciMLTesting = "09d9d899-5365-40a9-917a-5f67fddea283"
 SymbolicIndexingInterface = "2efcf032-c050-4f8e-a9bb-153293bab1f5"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["ADTypes", "Aqua", "LinearAlgebra", "OrdinaryDiffEqBDF", "OrdinaryDiffEqDefault", "OrdinaryDiffEq", "OrdinaryDiffEqNonlinearSolve", "OrdinaryDiffEqRosenbrock", "OrdinaryDiffEqSDIRK", "SafeTestsets", "Test", "ControlSystemsBase", "DataFrames", "DataInterpolations", "SciMLBase", "SciMLStructures", "SymbolicIndexingInterface", "ForwardDiff", "SciCompDSL", "ModelingToolkit"]
+test = ["ADTypes", "Aqua", "LinearAlgebra", "OrdinaryDiffEqBDF", "OrdinaryDiffEqDefault", "OrdinaryDiffEq", "OrdinaryDiffEqNonlinearSolve", "OrdinaryDiffEqRosenbrock", "OrdinaryDiffEqSDIRK", "SafeTestsets", "SciMLTesting", "Test", "ControlSystemsBase", "DataFrames", "DataInterpolations", "SciMLBase", "SciMLStructures", "SymbolicIndexingInterface", "ForwardDiff", "SciCompDSL", "ModelingToolkit"]

test/runtests.jl

@@ -1,15 +1,8 @@
 using SafeTestsets, Test
+using SciMLTesting
 
-const GROUP = get(ENV, "GROUP", "All")
-
-@time begin
-    if GROUP == "QA" || GROUP == "All"
-        @time @safetestset "Aqua" begin
-            include("aqua.jl")
-        end
-    end
-
-    if GROUP == "Core" || GROUP == "All"
+run_tests(;
+    core = () -> begin
         @testset "Core" begin
             # Blocks
             @safetestset "Blocks: utils" begin
@@ -77,5 +70,12 @@ const GROUP = get(ENV, "GROUP", "All")
                 include("Hydraulic/isothermal_compressible.jl")
             end
         end
-    end
-end
+    end,
+    # QA (Aqua) runs in the main test env; pass via `qa` so it also runs under "All",
+    # matching the original `GROUP == "QA" || GROUP == "All"` dispatch.
+    qa = () -> begin
+        @time @safetestset "Aqua" begin
+            include("aqua.jl")
+        end
+    end,
+)