move convert tests

Author: Miha Zgubic

test/deprecated.jl

@@ -36,4 +36,10 @@ end
 
 @testset "Deprecated: Inplacable Thunk argument order" begin
     @test (@test_deprecated InplaceableThunk(@thunk([1]), x->x.+=1)) isa InplaceableThunk
-end
+end
+
+@testset "Deprecated: convert from Tangent" begin
+    @test convert(NamedTuple, Tangent{Foo}(x=2.5)) == (; x=2.5)
+    @test convert(Tuple, Tangent{Tuple{Float64,}}(2.0)) == (2.0,)
+    @test convert(Dict, Tangent{Dict}(Dict(4 => 3))) == Dict(4 => 3)
+end

test/differentials/composite.jl

@@ -22,11 +22,6 @@ end
     @testset "empty types" begin
         @test typeof(Tangent{Tuple{}}()) == Tangent{Tuple{}, Tuple{}}
     end
-    @testset "convert" begin
-        @test convert(NamedTuple, Tangent{Foo}(x=2.5)) == (; x=2.5)
-        @test convert(Tuple, Tangent{Tuple{Float64,}}(2.0)) == (2.0,)
-        @test convert(Dict, Tangent{Dict}(Dict(4 => 3))) == Dict(4 => 3)
-    end
 
     @testset "==" begin
         @test Tangent{Foo}(x=0.1, y=2.5) == Tangent{Foo}(x=0.1, y=2.5)