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Bring over tests from ChainRulesCore. And report possible bug. #1228

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Bring over tests from ChainRulesCore. And report possible bug. #1228

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9a742c8
Bring over tests from ChainRulesCore
oxinabox Dec 27, 2023
dd6c386
add missing begin
oxinabox Jan 1, 2024
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19 changes: 18 additions & 1 deletion test/chainrules.jl
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Original file line number Diff line number Diff line change
@@ -1,7 +1,24 @@
using StaticArrays, ChainRulesCore, ChainRulesTestUtils, JLArrays, Test

@testset "Chain Rules Integration" begin
@testset "ChainRules Integration" begin
@testset "Projection" begin
# There is no code for this, but when argument isa StaticArray, axes(x) === axes(dx)
# implies a check, and reshape will wrap a Vector into a static SizedVector:
pstat = ProjectTo(SA[1, 2, 3])
@test axes(pstat(rand(3))) === (SOneTo(3),)

# This recurses into structured arrays:
pst = ProjectTo(transpose(SA[1, 2, 3]))
@test axes(pst(rand(1,3))) === (SOneTo(1), SOneTo(3))
@test pst(rand(1,3)) isa Transpose

# When the argument is an ordinary Array, static gradients are allowed to pass,
# like FillArrays. Collecting to an Array would cost a copy.
pvec3 = ProjectTo([1, 2, 3])
@test pvec3(SA[1, 2, 3]) isa StaticArray
end

@testset "Constructor rrules"
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test_rrule(SMatrix{1, 4}, (1.0, 1.0, 1.0, 1.0))
test_rrule(SMatrix{4, 1}, (1.0, 1.0, 1.0, 1.0))
test_rrule(SMatrix{2, 2}, (1.0, 1.0, 1.0, 1.0))
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