Ruby, работа с файлами

# frozen_string_literal: true
 
# lb7_1.rb
 
# class
class Text
  def initialize(name = 'file.dat')
    @file_name = name
  end
 
  def print_self
    File.open(@file_name, 'r').each { |i| puts i } if File.exist?(@file_name)
  end
 
  def all
    arr = []
    File.open(@file_name, 'r').each { |str| arr.push(str.chomp) }
    arr
  end
 
  def clear
    File.open(@file_name, 'w')
  end
 
  def add_line(xx1, yy1, xx2, yy2)
    File.open(@file_name, 'a') { |f| f.puts [1, xx1, yy1, xx2, yy2].join(' ') }
  end
 
  def add_circle(xxx, yyy, rrr)
    File.open(@file_name, 'a') { |f| f.puts [2, xxx, yyy, rrr].join(' ') }
  end
end

# frozen_string_literal: true
 
# test_lb7_2.rb
require './lb7_1.rb'
require 'minitest/autorun'
# Test class
class Test1 < MiniTest::Unit::TestCase
  def test_1
    a = Text.new
    a.clear
    a.add_line 1, 1, 2, 4
    a.add_circle 5, 4, 3
    assert_equal a.all, ['1 1 1 2 4', '2 5 4 3']
  end
 
  def test_2
    a = Text.new
    a.clear
    a.add_circle 678, 910, 911
    assert_equal a.all, ['2 678 910 911']
  end
 
  def test_3
    a = Text.new
    a.clear
    a.add_line 3.1415, 0, 0, 0
    assert_equal a.all, ['1 3.1415 0 0 0']
  end
 
  def test_4
    a = Text.new
    a.clear
    assert_equal a.all, []
  end
end

# frozen_string_literal: true
 
# tui_lb7_1
require './lb7_1'
a = Text.new
a.clear
puts 'Вывод:'
a.add_line 1, 1, 2, 4
a.add_circle 5, 4, 3
a.add_circle 1, 2, 3
a.add_circle 0, 0, 1
a.print_self