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add Field sum reproducer #2131

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add Field sum reproducer #2131

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24 changes: 24 additions & 0 deletions test/Fields/sum_repro.jl
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Original file line number Diff line number Diff line change
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import ClimaComms
ClimaComms.@import_required_backends
import ClimaCore
import ClimaCore: Fields
using Test

include(
joinpath(pkgdir(ClimaCore), "test", "TestUtilities", "TestUtilities.jl"),
)
import .TestUtilities as TU

@testset "Sum function over field" begin
FT = Float32
context = ClimaComms.context()

space = TU.SpectralElementSpace2D(FT; context)
field = Fields.zeros(space)
f = x -> x + 1

# Sum of a function applied to a field should be the same as the sum of the
# function applied to the parent field, but it isn't
@test sum(f, field) != sum(f, parent(field))
@test sum(f.(field)) != sum(f.(parent(field)))
end
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