Fix GPU-less tests.

test/cuda/cuda.jl

@@ -53,6 +53,10 @@ end
   @test y[3,:] isa CuArray
 end
 
-@info "Testing Flux/CUDNN"
-include("cudnn.jl")
-include("curnn.jl")
+if CuArrays.has_cudnn()
+  @info "Testing Flux/CUDNN"
+  include("cudnn.jl")
+  include("curnn.jl")
+else
+  @warn "CUDNN unavailable, not testing GPU DNN support"
+end

test/runtests.jl

@@ -19,7 +19,7 @@ include("layers/normalisation.jl")
 include("layers/stateless.jl")
 include("layers/conv.jl")
 
-if isdefined(Flux, :CUDA)
+if Flux.use_cuda[]
   include("cuda/cuda.jl")
 else
   @warn "CUDA unavailable, not testing GPU support"