Revert "fix"

This reverts commit d1f29ce.

test/test_JuliaBUGS.jl

@@ -46,22 +46,26 @@ exact_logZ = unid_target_exact_logZ(
     )
 end
 
-# @testset "SliceSampler on constrained and unconstrained versions" begin
-#     for target in (unid_target, unid_target_constrained)
-#         @show target.model
-#         pt = pigeons(;
-#             target,
-#             explorer = SliceSampler(), 
-#             n_chains=7, 
-#             n_rounds=5
-#         )
-#         @test isapprox(Pigeons.stepping_stone(pt), exact_logZ, rtol=0.1)
-#     end
-# end
+@testset "SliceSampler on constrained and unconstrained versions" begin
+    exact_logZ = unid_target_exact_logZ(
+        unid_target_model.evaluation_env.n_flips,
+        unid_target_model.evaluation_env.n_heads
+    )
+    for target in (unid_target, unid_target_constrained)
+        @show target.model
+        pt = pigeons(;
+            target,
+            explorer = SliceSampler(), 
+            n_chains=7, 
+            n_rounds=5
+        )
+        @test isapprox(Pigeons.stepping_stone(pt), exact_logZ, rtol=0.1)
+    end
+end
 
-# @testset "Invariance test" begin
-#     uncond_target = JuliaBUGSPath(compile(unid_model_def, (;n_flips=100000)))
-#     res = Pigeons.invariance_test(uncond_target, SliceSampler(); condition_on=(:n_heads,)) 
-#     @show res.pvalues
-#     @test res.passed
-# end
+@testset "Invariance test" begin
+    uncond_target = JuliaBUGSPath(compile(unid_model_def, (;n_flips=100000)))
+    res = Pigeons.invariance_test(uncond_target, SliceSampler(); condition_on=(:n_heads,)) 
+    @show res.pvalues
+    @test res.passed
+end