require_relative 'helper'

class TestBriefExample < Test::Unit::TestCase
  include Examples

  def test_brief_example
    p = brief_example
    cols = p.cols
    rows = p.rows

    z = p.obj.get
    x1 = cols[0].prim
    x2 = cols[1].prim
    x3 = cols[2].prim

    result = sprintf 'z = %g; x1 = %g; x2 = %g; x3 = %g', z, x1, x2, x3
    assert_equal 'z = 733.333; x1 = 33.3333; x2 = 66.6667; x3 = 0', result
    assert_equal Rglpk::GLP_NU, rows[0].stat
    assert_equal 100, rows[0].prim
    assert_equal 3.333333333333333, rows[0].dual
    File.delete('test.lp') rescue Errno::ENOENT
    p.write_lp('test.lp')
    assert File.exists?('test.lp')
  end
end