fix error on calling CUDA before testing its functional

Author: bgctw

.github/workflows/CI.yml

@@ -49,7 +49,8 @@ jobs:
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: false
+          #fail_ci_if_error: false
+          fail_ci_if_error: true
   docs:
     name: Documentation
     runs-on: ubuntu-latest

test/test_elbo.jl

@@ -57,8 +57,11 @@ end;
 
 # setup g as FluxNN on gpu
 using Flux
-scenario_flux = (scenario..., :use_Flux)
-g_flux, ϕg0_flux_cpu = get_hybridcase_MLapplicator(case; scenario = scenario_flux)
+
+if CUDA.functional()
+    scenario_flux = (scenario..., :use_Flux)
+    g_flux, ϕg0_flux_cpu = get_hybridcase_MLapplicator(case; scenario = scenario_flux)
+end
 
 if CUDA.functional()
     @testset "generate_ζ gpu" begin