Tangent{Tuple} and test sparsevec

Co-authored-by: Miha Zgubic <[email protected]>

Author: CarloLucibello

test/rulesets/SparseArrays/sparsematrix.jl

@@ -24,7 +24,13 @@ end
     rand!(dA.nzval)
     I, J, V = findnz(A)
     V̄ = rand!(similar(V))
-    test_rrule(findnz, A ⊢ dA, output_tangent=(zeros(length(I)), zeros(length(J)), V̄))
+    test_rrule(findnz, A ⊢ dA, output_tangent=Tangent{Tuple}(zeros(length(I)), zeros(length(J)), V̄))
+    
+    v = sparsevec([1, 2, 3], rand(3), 5)
+    dv = sparsevec([1, 2, 3], rand(3), 5)
+    inds, values = findnz(v)
+    v̄alues = rand!(similar(values))
+    test_rrule(findnz, v ⊢ dv, output_tangent=Tangent{Tuple}(zeros(length(inds)), v̄alues))
 end
 
 @testset "broadcasted cast SparseMatrixCSC" begin