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4 changes: 2 additions & 2 deletions README.md
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# ChainRulesTestUtils.jl

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> Utilities for testing forward- and reverse-mode AD sensitivities.
> Collection of utilities for testing forward- and reverse-mode AD sensitivities.

`ChainRulesTestUtils.jl` is designed to help you test `ChainRulesCore.frule` and `ChainRulesCore.rrule` methods.
The main entry points are `ChainRulesTestUtils.frule_test`, `ChainRulesTestUtils.rrule_test`, and `ChainRulesTestUtils.test_scalar`
Currently this is done via testing the rules against numerical differentiation (using [`FiniteDifferences.jl`](https://github.com/JuliaDiff/FiniteDifferences.jl)).

`ChainRulesTestUtils.jl` is separate from [`ChainRulesCore.jl`](https://github.com/JuliaDiff/ChainRulesCore.jl) so that it can be a test-only dependency, allowing it to have potentially heavy dependencies, while keeping `ChainRulesCore.jl` as light-weight as possible.