Enable Mooncake on 1.12 (#2724)

Author: penelopeysm

test/Project.toml

@@ -21,6 +21,7 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 LogDensityProblems = "6fdf6af0-433a-55f7-b3ed-c6c6e0b8df7c"
 LogDensityProblemsAD = "996a588d-648d-4e1f-a8f0-a84b347e47b1"
 MCMCChains = "c7f686f2-ff18-58e9-bc7b-31028e88f75d"
+Mooncake = "da2b9cff-9c12-43a0-ae48-6db2b0edb7d6"
 NamedArrays = "86f7a689-2022-50b4-a561-43c23ac3c673"
 Optim = "429524aa-4258-5aef-a3af-852621145aeb"
 Optimization = "7f7a1694-90dd-40f0-9382-eb1efda571ba"

test/ad.jl

@@ -8,15 +8,7 @@ using Random: Random
 using StableRNGs: StableRNG
 using Test
 using ..Models: gdemo_default
-import ForwardDiff, ReverseDiff
-
-# Skip Mooncake on 1.12 as it is not compatible yet
-const INCLUDE_MOONCAKE = VERSION < v"1.12"
-if INCLUDE_MOONCAKE
-    import Pkg
-    Pkg.add("Mooncake")
-    using Mooncake: Mooncake
-end
+import ForwardDiff, ReverseDiff, Mooncake
 
 """Element types that are always valid for a VarInfo regardless of ADType."""
 const always_valid_eltypes = (AbstractFloat, AbstractIrrational, Integer, Rational)
@@ -33,10 +25,8 @@ eltypes_by_adtype = Dict(
         ReverseDiff.TrackedVecOrMat,
         ReverseDiff.TrackedVector,
     ),
+    AutoMooncake => (Mooncake.CoDual,),
 )
-if INCLUDE_MOONCAKE
-    eltypes_by_adtype[AutoMooncake] = (Mooncake.CoDual,)
-end
 
 """
     AbstractWrongADBackendError
@@ -177,10 +167,7 @@ end
 """
 All the ADTypes on which we want to run the tests.
 """
-ADTYPES = [AutoForwardDiff(), AutoReverseDiff(; compile=false)]
-if INCLUDE_MOONCAKE
-    push!(ADTYPES, AutoMooncake(; config=nothing))
-end
+ADTYPES = [AutoForwardDiff(), AutoReverseDiff(; compile=false), AutoMooncake()]
 
 # Check that ADTypeCheckContext itself works as expected.
 @testset "ADTypeCheckContext" begin