Color Classifier spec example for Carrot

color_classifier_spec.rb

require 'rails_helper'

::LIGHT_COLORS = %i[
  #800000
  #ff0000
  #800080
  #ff00ff
  #008000
  #00ff00
  #808000
  #ffff00
  #000080
  #0000ff
  #008080
  #00ffff
]

::GRAYSCALE_COLORS = %i[
  #000000
  #c0c0c0
  #808080
  #ffffff
]

describe ColorClassifier do
  subject { described_class.new(attributes) }

  describe '#grayscale?' do
    ::LIGHT_COLORS.each do |color|
      context "when #{color}" do
        let(:attributes) { { hex_code: color } }

        it 'returns false' do
          expect(subject.grayscale?).to eq false
        end
      end
    end

    ::GRAYSCALE_COLORS.each do |color|
      context "when #{color}" do
        let(:attributes) { { hex_code: color } }

        it 'returns true' do
          expect(subject.grayscale?).to eq true
        end
      end
    end
  end
end