ahacop

### Keybase proof

I hereby claim:

  * I am ahacop on github.
  * I am arahacopian (https://keybase.io/arahacopian) on keybase.
  * I have a public key ASDLzEBNJ5jujRJ_Ei7ZsSf12Ruowgs_ScrIRr9NiQd7tgo

To claim this, I am signing this object:

ahacop

bundle config --local build.mysql2 "--with-opt-dir="$(brew --prefix openssl) "--with-ldflags=-L"$(brew --prefix zstd)"/lib"

# https://stackoverflow.com/questions/67840691/ld-library-not-found-for-lzstd-while-bundle-install-for-mysql2-gem-ruby-on-mac

ahacop

const identity = x => x
const flip = f => x => y => f(y)(x)
const prepend = x => y => x.concat(y)
const append = flip(prepend)
const exec = (x, f) => f(x)
const pipe = (...fns) => x => fns.reduce(exec, x)
const wrap = x => y => pipe(
  prepend(x),
  append(y)
)

ahacop

require "rmagick"

RSpec::Matchers.define :be_similar_image do |expected_blob, max_error = 0.001|
  expected = Magick::Image.from_blob(expected_blob)[0].adaptive_resize(60, 60)

  match do |actual_blob|
    actual = Magick::Image.from_blob(actual_blob)[0].adaptive_resize(60, 60)
    _, normalized_mean_error, _ = actual.difference(expected)
    expect(normalized_mean_error).to be <= max_error
  end