brew/Library/Homebrew/test/keg_relocate/grep_spec.rb

# frozen_string_literal: true

require "keg_relocate"

RSpec.describe Keg do
  subject(:keg) { described_class.new(HOMEBREW_CELLAR/"foo/1.0.0") }

  let(:dir) { HOMEBREW_CELLAR/"foo/1.0.0" }
  let(:text_file) { dir/"file.txt" }
  let(:binary_file) { dir/"file.bin" }

  before do
    dir.mkpath
  end

  def setup_text_file
    text_file.atomic_write <<~EOS
      #{dir}/file.txt
      /foo#{dir}/file.txt
      foo/bar:#{dir}/file.txt
      foo/bar:/foo#{dir}/file.txt
      #{dir}/bar.txt:#{dir}/baz.txt
    EOS
  end

  def setup_binary_file
    binary_file.atomic_write <<~EOS
      \x00
    EOS
  end

  describe "#each_unique_file_matching" do
    specify "find string matches to path" do
      setup_text_file

      string_matches = Set.new
      keg.each_unique_file_matching(dir) do |file|
        string_matches << file
      end

      expect(string_matches.size).to eq 1
    end
  end

  describe "#binary_file?" do
    specify "test if file has null bytes" do
      setup_binary_file

      expect(keg.binary_file?(binary_file)).to be true

      setup_text_file

      expect(keg.binary_file?(text_file)).to be false
    end
  end
end