require 'ipconverter'
require 'minitest/autorun'

class TestIpConverter < MiniTest::Test
  MAX_IP_INT = 4294967295
  def setup
  end

  def test_smallest_ip
    int = IpConverter.str_to_int '0.0.0.0'
    assert_equal int, 0
  end

  def test_largest_ip
    int = IpConverter.str_to_int '255.255.255.255'
    # maximum 32-bit integer
    assert_equal int, MAX_IP_INT
  end

  def test_handles_spaces
    int = IpConverter.str_to_int ' 35.49.102.66 '
    assert_equal int, IpConverter.str_to_int('35.49.102.66')
  end

  def test_no_overflow
    assert_raises(ArgumentError) { IpConverter.str_to_int '12.12.0.256' }
  end

  def test_short_ip
    assert_raises(ArgumentError) { IpConverter.str_to_int '12.34.56' }
  end

  def test_long_ip
    assert_raises(ArgumentError) { IpConverter.str_to_int '12.34.56.78.90' }
  end

  def test_junk
    assert_raises(ArgumentError) { IpConverter.str_to_int 'junk' }
  end

  def test_int_to_str_0
    assert_equal "0.0.0.0", IpConverter.int_to_str(0)
  end

  def test_int_to_str_max
    assert_equal "255.255.255.255", IpConverter.int_to_str(MAX_IP_INT) 
  end

  def test_int_to_str_negative
    assert_raises(ArgumentError) { IpConverter.int_to_str -1 }
  end

  def test_int_to_str_too_big
    assert_raises(ArgumentError) { IpConverter.int_to_str(MAX_IP_INT + 1) }
  end
end