libkernaux/pkgs/ruby/spec/lib/kernaux/sprintf_spec.rb

# frozen_string_literal: true

require 'spec_helper'

RSpec.describe KernAux, '.sprintf' do
  if described_class.singleton_class.method_defined? :sprintf
    subject(:sprintf) { described_class.sprintf 'Hello, ', ['%s', 'World'], '!' }

    it { is_expected.to be_instance_of String }
    it { is_expected.to be_frozen }
    it { is_expected.to eq 'Hello, World!' }

    context 'for empty string value' do
      subject(:sprintf) { described_class.sprintf ['Hello testing%s'] }

      it { is_expected.to eq 'Hello testing' }
    end

    [
      ['',      'using regular tests'],
      ['_orig', 'using original tests'],
    ].each do |(suffix, description)|
      context description do
        printf_yml =
          File.expand_path("../../../../../common/printf#{suffix}.yml", __dir__)

        YAML.safe_load_file(printf_yml).each do |test|
          expected = test['result']

          args = test['args'].map do |arg|
            if arg.is_a? String
              arg
            else
              arg.map do |item|
                if item.is_a? Array
                  item[0]
                else
                  item
                end
              end
            end
          end

          it "transforms #{args.inspect} to #{expected.inspect}" do
            expect(described_class.sprintf(*args)).to eq expected
          end
        end
      end
    end
  end
end