Fix tests

Author: penelopeysm

test/ad.jl

@@ -111,9 +111,10 @@ using DynamicPPL.TestUtils.AD: run_ad, WithExpectedResult, NoTest
 
         # Compiling the ReverseDiff tape used to fail here
         spl = Sampler(MyEmptyAlg())
+        vi = DynamicPPL.link!!(VarInfo(model), model)
         sampling_model = contextualize(model, SamplingContext(model.context))
         ldf = LogDensityFunction(
-            sampling_model, getlogjoint_internal; adtype=AutoReverseDiff(; compile=true)
+            sampling_model, getlogjoint_internal, vi; adtype=AutoReverseDiff(; compile=true)
         )
         x = ldf.varinfo[:]
         @test LogDensityProblems.logdensity_and_gradient(ldf, x) isa Any

test/contexts.jl

@@ -50,7 +50,6 @@ Base.IteratorEltype(::Type{<:AbstractContext}) = Base.EltypeUnknown()
     contexts = Dict(
         :default => DefaultContext(),
         :testparent => DynamicPPL.TestUtils.TestParentContext(DefaultContext()),
-        :sampling => SamplingContext(),
         :prefix => PrefixContext(@varname(x)),
         :condition1 => ConditionContext((x=1.0,)),
         :condition2 => ConditionContext(