Remove Deprecations. Replace tangent_transforms functionality

docs/Manifest.toml

@@ -1,5 +1,10 @@
 # This file is machine-generated - editing it directly is not advised
 
+[[ANSIColoredPrinters]]
+git-tree-sha1 = "574baf8110975760d391c710b6341da1afa48d8c"
+uuid = "a4c015fc-c6ff-483c-b24f-f7ea428134e9"
+version = "0.0.1"
+
 [[ArgTools]]
 uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
 
@@ -11,15 +16,15 @@ uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
 [[ChainRulesCore]]
 deps = ["Compat", "LinearAlgebra", "SparseArrays"]
-git-tree-sha1 = "0b0aa9d61456940511416b59a0e902c57b154956"
+git-tree-sha1 = "f53ca8d41e4753c41cdafa6ec5f7ce914b34be54"
 uuid = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
-version = "0.10.12"
+version = "0.10.13"
 
 [[ChainRulesTestUtils]]
 deps = ["ChainRulesCore", "Compat", "FiniteDifferences", "LinearAlgebra", "Random", "Test"]
 path = ".."
 uuid = "cdddcdb0-9152-4a09-a978-84456f9df70a"
-version = "0.7.13"
+version = "1.0.0-DEV"
 
 [[Compat]]
 deps = ["Base64", "Dates", "DelimitedFiles", "Distributed", "InteractiveUtils", "LibGit2", "Libdl", "LinearAlgebra", "Markdown", "Mmap", "Pkg", "Printf", "REPL", "Random", "SHA", "Serialization", "SharedArrays", "Sockets", "SparseArrays", "Statistics", "Test", "UUIDs", "Unicode"]
@@ -46,20 +51,20 @@ uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.5"
 
 [[Documenter]]
-deps = ["Base64", "Dates", "DocStringExtensions", "IOCapture", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
-git-tree-sha1 = "47f13b6305ab195edb73c86815962d84e31b0f48"
+deps = ["ANSIColoredPrinters", "Base64", "Dates", "DocStringExtensions", "IOCapture", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
+git-tree-sha1 = "95265abf7d7bf06dfdb8d58525a23ea5fb0bdeee"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
-version = "0.27.3"
+version = "0.27.4"
 
 [[Downloads]]
 deps = ["ArgTools", "LibCURL", "NetworkOptions"]
 uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
 
 [[FiniteDifferences]]
 deps = ["ChainRulesCore", "LinearAlgebra", "Printf", "Random", "Richardson", "StaticArrays"]
-git-tree-sha1 = "12417e4754486a547d98d65293dc0fafdfcc0736"
+git-tree-sha1 = "18761c465ef2e87d9091c0fefb61f70d532d4cc0"
 uuid = "26cc04aa-876d-5657-8c51-4c34ba976000"
-version = "0.12.14"
+version = "0.12.16"
 
 [[IOCapture]]
 deps = ["Logging", "Random"]
@@ -167,9 +172,9 @@ uuid = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [[StaticArrays]]
 deps = ["LinearAlgebra", "Random", "Statistics"]
-git-tree-sha1 = "a43a7b58a6e7dc933b2fa2e0ca653ccf8bb8fd0e"
+git-tree-sha1 = "1b9a0f17ee0adde9e538227de093467348992397"
 uuid = "90137ffa-7385-5640-81b9-e52037218182"
-version = "1.2.6"
+version = "1.2.7"
 
 [[Statistics]]
 deps = ["LinearAlgebra", "SparseArrays"]

docs/src/api.md

@@ -4,9 +4,3 @@
 Modules = [ChainRulesTestUtils]
 Private = false
 ```
-
-
-## Global Configuration
-```@docs
-ChainRulesTestUtils.enable_tangent_transform!
-```

docs/src/index.md

@@ -72,7 +72,7 @@ The call will test the `rrule` for function `f` at the point `x`, and similarly
 ```jldoctest ex
 julia> test_rrule(two2three, 3.33, -7.77);
 Test Summary:                            | Pass  Total
-test_rrule: two2three on Float64,Float64 |    8      8
+test_rrule: two2three on Float64,Float64 |    9      9
 
 ```
 
@@ -100,12 +100,12 @@ call.
 ```jldoctest ex
 julia> test_scalar(relu, 0.5);
 Test Summary:            | Pass  Total
-test_scalar: relu at 0.5 |   10     10
+test_scalar: relu at 0.5 |   11     11
 
 
 julia> test_scalar(relu, -0.5);
 Test Summary:             | Pass  Total
-test_scalar: relu at -0.5 |   10     10
+test_scalar: relu at -0.5 |   11     11
 
 ```
 

src/ChainRulesTestUtils.jl

@@ -29,6 +29,4 @@ include("check_result.jl")
 include("rule_config.jl")
 include("finite_difference_calls.jl")
 include("testers.jl")
-
-include("deprecated.jl")
 end # module

src/check_result.jl

@@ -143,7 +143,7 @@ function test_approx(actual::A, expected::E, msg=""; kwargs...) where {A,E}
         if (c_actual isa A) && (c_expected isa E)  # prevent stack-overflow
             throw(MethodError, test_approx, (actual, expected))
         end
-        test_approx(c_actual, c_expected; kwargs...)
+        test_approx(c_actual, c_expected, msg; kwargs...)
     end
 end
 

src/global_config.jl

@@ -1,28 +1,6 @@
 const _fdm = central_fdm(5, 1; max_range=1e-2)
 const TEST_INFERRED = Ref(true)
-const TRANSFORMS_TO_ALT_TANGENTS = Function[] # e.g. [x -> @thunk(x), _ -> ZeroTangent(), x -> rebasis(x)]
-
-"""
-    enable_tangent_transform!(Thunk)
-
-Adds a alt-tangent tranform to the list of default `tangent_transforms` for
-[`test_frule`](@ref) and [`test_rrule`](@ref) to test.
-This list of defaults is overwritten by the `tangent_transforms` keyword argument.
-
-!!! info "Transitional Feature"
-    ChainRulesCore v1.0 will require that all well-behaved rules work for a variety of
-    tangent representations. In turn, the corresponding release of ChainRulesTestUtils will 
-    test all the different tangent representations by default.
-    At that stage `enable_tangent_transform!(Thunk)` will have no effect, as it will already 
-    be enabled.
-    We provide this configuration as a transitional feature to help migrate your packages
-    one feature at a time, prior to the breaking release of ChainRulesTestUtils that will
-    enforce it.  
-"""
-function enable_tangent_transform!(::Type{Thunk})
-    push!(TRANSFORMS_TO_ALT_TANGENTS, x->@thunk(x))
-    unique!(TRANSFORMS_TO_ALT_TANGENTS)
-end
+const TRANSFORMS_TO_ALT_TANGENTS = Function[x->@thunk(x)] # e.g. [_ -> ZeroTangent(), x -> rebasis(x)]
 
 "sets up TEST_INFERRED based ion enviroment variables"
 function init_test_inferred_setting!()

src/testers.jl

@@ -80,12 +80,6 @@ end
 # Keyword Arguments
    - `output_tangent` tangent to test accumulation of derivatives against
      should be a differential for the output of `f`. Is set automatically if not provided.
-   - `tangent_transforms=TRANSFORMS_TO_ALT_TANGENTS`: a vector of functions that
-      transform the passed argument tangents into alternative tangents that should be tested.
-      Note that the alternative tangents are only tested for not erroring when passed to
-      frule. Testing for correctness using finite differencing can be done using a
-      separate `test_frule` call, e.g. for testing a `ZeroTangent()` for correctness:
-      `test_frule(f, x ⊢ ZeroTangent(); tangent_transforms=[])`.
    - `fdm::FiniteDifferenceMethod`: the finite differencing method to use.
    - `frule_f=frule`: Function with an `frule`-like API that is tested (defaults to
      `frule`). Used for testing gradients from AD systems.
@@ -104,7 +98,6 @@ function test_frule(
     f,
     args...;
     output_tangent=Auto(),
-    tangent_transforms=TRANSFORMS_TO_ALT_TANGENTS,
     fdm=_fdm,
     frule_f=ChainRulesCore.frule,
     check_inferred::Bool=true,
@@ -136,41 +129,16 @@ function test_frule(
         Ω = call_on_copy(primals...)
         test_approx(Ω_ad, Ω; isapprox_kwargs...)
 
-        # TODO: remove Nothing when https://github.com/JuliaDiff/ChainRulesTestUtils.jl/issues/113
-        is_ignored = isa.(tangents, Union{Nothing,NoTangent})
-        if any(tangents .== nothing)
-            Base.depwarn(
-                "test_frule(f, k ⊢ nothing) is deprecated, use " *
-                "test_frule(f, k ⊢ NoTangent()) instead for non-differentiable ks",
-                :test_frule,
-            )
-        end
-
         # Correctness testing via finite differencing.
+        is_ignored = isa.(tangents, NoTangent)
         dΩ_fd = _make_jvp_call(fdm, call_on_copy, Ω, primals, tangents, is_ignored)
         test_approx(dΩ_ad, dΩ_fd; isapprox_kwargs...)
 
         acc = output_tangent isa Auto ? rand_tangent(Ω) : output_tangent
         _test_add!!_behaviour(acc, dΩ_ad; isapprox_kwargs...)
-
-        # test that rules work for other tangents
-        _test_frule_alt_tangents(
-            call_on_copy, frule_f, config, tangent_transforms, tangents, primals, acc;
-            isapprox_kwargs...
-        )
     end  # top-level testset
 end
 
-function _test_frule_alt_tangents(
-    call, frule_f, config, tangent_transforms, tangents, primals, acc;
-    isapprox_kwargs...
-)
-    @testset "ȧrgs = $(_string_typeof(tsf.(tangents)))" for tsf in tangent_transforms
-        _, dΩ = call(frule_f, config, tsf.(tangents), primals...)
-        _test_add!!_behaviour(acc, dΩ; isapprox_kwargs...)
-    end
-end
-
 """
     test_rrule([config::RuleConfig,] f, args...; kwargs...)
 
@@ -185,12 +153,8 @@ end
 # Keyword Arguments
  - `output_tangent` the seed to propagate backward for testing (technically a cotangent).
    should be a differential for the output of `f`. Is set automatically if not provided.
-- `tangent_transforms=TRANSFORMS_TO_ALT_TANGENTS`: a vector of functions that
-   transform the passed `output_tangent` into alternative tangents that should be tested.
-   Note that the alternative tangents are only tested for not erroring when passed to
-   rrule. Testing for correctness using finite differencing can be done using a
-   separate `test_rrule` call, e.g. for testing a `ZeroTangent()` for correctness:
-   `test_rrule(f, args...; output_tangent=ZeroTangent(), tangent_transforms=[])`.
+- `check_thunked_output_tangent=true`: also checks that passing a thunked version of the 
+    output tangent to the pullback returns the same result.
  - `fdm::FiniteDifferenceMethod`: the finite differencing method to use.
  - `rrule_f=rrule`: Function with an `rrule`-like API that is tested (defaults to `rrule`).
    Used for testing gradients from AD systems.
@@ -209,7 +173,7 @@ function test_rrule(
     f,
     args...;
     output_tangent=Auto(),
-    tangent_transforms=TRANSFORMS_TO_ALT_TANGENTS,
+    check_thunked_output_tangent=true,
     fdm=_fdm,
     rrule_f=ChainRulesCore.rrule,
     check_inferred::Bool=true,
@@ -254,22 +218,13 @@ function test_rrule(
         )
 
         # Correctness testing via finite differencing.
-        # TODO: remove Nothing when https://github.com/JuliaDiff/ChainRulesTestUtils.jl/issues/113
-        is_ignored = isa.(accum_cotangents, Union{Nothing, NoTangent})
-        if any(accum_cotangents .== nothing)
-            Base.depwarn(
-                "test_rrule(f, k ⊢ nothing) is deprecated, use " *
-                "test_rrule(f, k ⊢ NoTangent()) instead for non-differentiable ks",
-                :test_rrule,
-            )
-        end
-
+        is_ignored = isa.(accum_cotangents, NoTangent)
         fd_cotangents = _make_j′vp_call(fdm, call, ȳ, primals, is_ignored)
 
         for (accum_cotangent, ad_cotangent, fd_cotangent) in zip(
             accum_cotangents, ad_cotangents, fd_cotangents
         )
-            if accum_cotangent isa Union{Nothing,NoTangent}  # then we marked this argument as not differentiable # TODO remove once #113
+            if accum_cotangent isa NoTangent  # then we marked this argument as not differentiable
                 @assert fd_cotangent === nothing  # this is how `_make_j′vp_call` works
                 ad_cotangent isa ZeroTangent && error(
                     "The pullback in the rrule should use NoTangent()" *
@@ -285,21 +240,10 @@ function test_rrule(
             end
         end
 
-        # test other tangents don't error when passed to the pullback
-        _test_rrule_alt_tangents(pullback, tangent_transforms, ȳ, accum_cotangents)
-    end  # top-level testset
-end
-
-function _test_rrule_alt_tangents(
-    pullback, tangent_transforms, ȳ, accum_cotangents;
-    isapprox_kwargs...
-)
-    @testset "ȳ = $(_string_typeof(tsf(ȳ)))" for tsf in tangent_transforms
-        ad_cotangents = pullback(tsf(ȳ))
-        for (accum_cotangent, ad_cotangent) in zip(accum_cotangents, ad_cotangents)
-            _test_add!!_behaviour(accum_cotangent, ad_cotangent; isapprox_kwargs...)
+        if check_thunked_output_tangent
+            test_approx(ad_cotangents, pullback(@thunk(ȳ)), "pulling back a thunk:")
         end
-    end
+    end  # top-level testset
 end
 
 """