Add tests for NoDist

Author: cpfiffer

test/distribution_wrappers.jl

@@ -0,0 +1,16 @@
+using DynamicPPL
+using Distributions
+
+@testset "distribution_wrappers.jl" begin
+    d = Normal()
+    nd = DynamicPPL.NoDist(d)
+
+    # Smoke test
+    rand(nd)
+
+    # Actual tests
+    @test minimum(nd) == -Inf
+    @test maximum(nd) == Inf
+    @test logpdf(ndf, 15.0) == 0
+    @test logpdf_with_trans(nd, 0)
+end