# frozen_string_literal: true

require "test_helper"
require "test-cmd"

class ReadMeTest < Minitest::Test
  def test_1_capability_mode_example
    r = ruby(readme_example("1_capability_mode_example.rb"))
    assert_match %r{In capability mode: no\n}, r.stdout
    assert_match %r{Enter capability mode: ok\n}, r.stdout
    assert_match %r{In capability mode: yes\n}, r.stdout
    assert_match %r{Error:.+\(Errno::ECAPMODE\)\n}, r.stdout
  end

  def test_2_fork_example
    r = ruby(readme_example("2_fork_example.rb"))
    ["[parent] In capability mode: no\n",
     "[subprocess] Enter capability mode: ok\n",
     "[subprocess] In capability mode: yes\n",
     "[subprocess] Exit\n",
     "[parent] In capability mode: no\n"
    ].each { assert_match(/#{Regexp.escape(_1)}/, r.stdout) }
  end

  def test_3_set_rights_example
    r = ruby(readme_example("3_set_rights_example.rb"))
    ["[parent] obtain file descriptor (with read+write permissions)\n",
     "[subprocess] reduce rights to read-only\n",
     "[subprocess] read successful\n",
     %r{\[subprocess\] Error:.+\(Errno::ENOTCAPABLE\)\n},
     "[parent] write successful\n"
    ].each { assert_match((Regexp === _1) ? _1 : /#{Regexp.escape(_1)}/, r.stdout) }
  ensure
    FileUtils.rm File.join(Dir.home, "bsdcapsicum.txt")
  end

  private

  def ruby(*argv)
    cmd("ruby", *argv)
  end

  def readme_example(example_name)
    File.join(__dir__, "..", "share", "ruby-capsicum", "examples", example_name)
  end
end