Add backend argument for examples_testset

Author: christiangnrd

examples/utils.jl

@@ -1,11 +1,13 @@
 # EXCLUDE FROM TESTING
-if Base.find_package("CUDA") !== nothing
-    using CUDA
-    using CUDA.CUDAKernels
-    const backend = CUDABackend()
-    CUDA.allowscalar(false)
-else
-    const backend = CPU()
+if !(@isdefined backend)
+    if Base.find_package("CUDA") !== nothing
+        using CUDA
+        using CUDA.CUDAKernels
+        const backend = CUDABackend()
+        CUDA.allowscalar(false)
+    else
+        const backend = CPU()
+    end
 end
 
 const f_type = KernelAbstractions.supports_float64(backend) ? Float64 : Float32

test/examples.jl

@@ -9,7 +9,7 @@ function find_sources(path::String, sources = String[])
     return sources
 end
 
-function examples_testsuite(backend_str)
+function examples_testsuite(backend, backend_str)
     @testset "examples" begin
         examples_dir = joinpath(@__DIR__, "..", "examples")
         examples = find_sources(examples_dir)
@@ -21,6 +21,7 @@ function examples_testsuite(backend_str)
         @testset "$(basename(example))" for example in examples
             @eval module $(gensym())
             backend_str = $backend_str
+            const backend = ($backend)()
             include($example)
             end
             @test true

test/testsuite.jl

@@ -84,7 +84,7 @@ function testsuite(backend, backend_str, backend_mod, AT, DAT; skip_tests = Set{
     end
 
     @conditional_testset "Examples" skip_tests begin
-        examples_testsuite(backend_str)
+        examples_testsuite(backend, backend_str)
     end
 
     return