Only run JET tests on explicitly supported versions (#828)

* Only run JET tests on explicitly supported versions

* Update test/QATest.jl

Co-authored-by: David Müller-Widmann <devmotion@users.noreply.github.com>

* Fix condition

---------

Co-authored-by: Andreas Noack <andreas@noack.dk>

Author: devmotion

Project.toml

@@ -27,7 +27,7 @@ DiffResults = "1.1"
 DiffRules = "1.4"
 DiffTests = "0.1"
 IrrationalConstants = "0.1, 0.2"
-JET = "0.9, 0.10, 0.11"
+JET = "0.9, 0.12"
 LogExpFunctions = "0.3, 1"
 NaNMath = "1"
 Preferences = "1"

test/QATest.jl

@@ -3,14 +3,16 @@ module QATest
 using ForwardDiff
 using Test
 
-using JET: @test_opt
+import JET
 
-@testset "JET" begin
-    # issue #778
-    @test_opt ForwardDiff.derivative(identity, 1.0)
-    @test_opt ForwardDiff.gradient(only, [1.0], ForwardDiff.GradientConfig(only, [1.0], ForwardDiff.Chunk{1}()))
-    @test_opt ForwardDiff.jacobian(identity, [1.0], ForwardDiff.JacobianConfig(identity, [1.0], ForwardDiff.Chunk{1}()))
-    @test_opt ForwardDiff.hessian(only, [1.0], ForwardDiff.HessianConfig(only, [1.0], ForwardDiff.Chunk{1}()))
+if !isdefined(JET, :JET_AVAILABLE) || JET.JET_AVAILABLE
+    @testset "JET" begin
+        # issue #778
+        JET.@test_opt ForwardDiff.derivative(identity, 1.0)
+        JET.@test_opt ForwardDiff.gradient(only, [1.0], ForwardDiff.GradientConfig(only, [1.0], ForwardDiff.Chunk{1}()))
+        JET.@test_opt ForwardDiff.jacobian(identity, [1.0], ForwardDiff.JacobianConfig(identity, [1.0], ForwardDiff.Chunk{1}()))
+        JET.@test_opt ForwardDiff.hessian(only, [1.0], ForwardDiff.HessianConfig(only, [1.0], ForwardDiff.Chunk{1}()))
+    end
 end
 
 end # module