require 'test/unit'
require_relative 'ruby/envutil'

# mathn redefines too much. It must be isolated to child processes.
class TestMathn < Test::Unit::TestCase
  def test_power
    assert_in_out_err ['-r', 'mathn', '-e', 'a=1**2;!a'], "", [], [], '[ruby-core:25740]'
    assert_in_out_err ['-r', 'mathn', '-e', 'a=(1 << 126)**2;!a'], "", [], [], '[ruby-core:25740]'
    assert_in_out_err ['-r', 'mathn/complex', '-e', 'a=Complex(0,1)**4;!a'], "", [], [], '[ruby-core:44170]'
    assert_in_out_err ['-r', 'mathn/complex', '-e', 'a=Complex(0,1)**5;!a'], "", [], [], '[ruby-core:44170]'
  end

  def test_floor
    assert_separately(%w[-rmathn], <<-EOS)
      assert_equal( 2, ( 13/5).floor)
      assert_equal( 2, (  5/2).floor)
      assert_equal( 2, ( 12/5).floor)
      assert_equal(-3, (-12/5).floor)
      assert_equal(-3, ( -5/2).floor)
      assert_equal(-3, (-13/5).floor)

      assert_equal( 2, ( 13/5).floor(0))
      assert_equal( 2, (  5/2).floor(0))
      assert_equal( 2, ( 12/5).floor(0))
      assert_equal(-3, (-12/5).floor(0))
      assert_equal(-3, ( -5/2).floor(0))
      assert_equal(-3, (-13/5).floor(0))

      assert_equal(( 13/5), ( 13/5).floor(2))
      assert_equal((  5/2), (  5/2).floor(2))
      assert_equal(( 12/5), ( 12/5).floor(2))
      assert_equal((-12/5), (-12/5).floor(2))
      assert_equal(( -5/2), ( -5/2).floor(2))
      assert_equal((-13/5), (-13/5).floor(2))
    EOS
  end

  def test_ceil
    assert_separately(%w[-rmathn], <<-EOS)
      assert_equal( 3, ( 13/5).ceil)
      assert_equal( 3, (  5/2).ceil)
      assert_equal( 3, ( 12/5).ceil)
      assert_equal(-2, (-12/5).ceil)
      assert_equal(-2, ( -5/2).ceil)
      assert_equal(-2, (-13/5).ceil)

      assert_equal( 3, ( 13/5).ceil(0))
      assert_equal( 3, (  5/2).ceil(0))
      assert_equal( 3, ( 12/5).ceil(0))
      assert_equal(-2, (-12/5).ceil(0))
      assert_equal(-2, ( -5/2).ceil(0))
      assert_equal(-2, (-13/5).ceil(0))

      assert_equal(( 13/5), ( 13/5).ceil(2))
      assert_equal((  5/2), (  5/2).ceil(2))
      assert_equal(( 12/5), ( 12/5).ceil(2))
      assert_equal((-12/5), (-12/5).ceil(2))
      assert_equal(( -5/2), ( -5/2).ceil(2))
      assert_equal((-13/5), (-13/5).ceil(2))
    EOS
  end

  def test_truncate
    assert_separately(%w[-rmathn], <<-EOS)
      assert_equal( 2, ( 13/5).truncate)
      assert_equal( 2, (  5/2).truncate)
      assert_equal( 2, ( 12/5).truncate)
      assert_equal(-2, (-12/5).truncate)
      assert_equal(-2, ( -5/2).truncate)
      assert_equal(-2, (-13/5).truncate)

      assert_equal( 2, ( 13/5).truncate(0))
      assert_equal( 2, (  5/2).truncate(0))
      assert_equal( 2, ( 12/5).truncate(0))
      assert_equal(-2, (-12/5).truncate(0))
      assert_equal(-2, ( -5/2).truncate(0))
      assert_equal(-2, (-13/5).truncate(0))

      assert_equal(( 13/5), ( 13/5).truncate(2))
      assert_equal((  5/2), (  5/2).truncate(2))
      assert_equal(( 12/5), ( 12/5).truncate(2))
      assert_equal((-12/5), (-12/5).truncate(2))
      assert_equal(( -5/2), ( -5/2).truncate(2))
      assert_equal((-13/5), (-13/5).truncate(2))
    EOS
  end

  def test_round
    assert_separately(%w[-rmathn], <<-EOS)
      assert_equal( 3, ( 13/5).round)
      assert_equal( 3, (  5/2).round)
      assert_equal( 2, ( 12/5).round)
      assert_equal(-2, (-12/5).round)
      assert_equal(-3, ( -5/2).round)
      assert_equal(-3, (-13/5).round)

      assert_equal( 3, ( 13/5).round(0))
      assert_equal( 3, (  5/2).round(0))
      assert_equal( 2, ( 12/5).round(0))
      assert_equal(-2, (-12/5).round(0))
      assert_equal(-3, ( -5/2).round(0))
      assert_equal(-3, (-13/5).round(0))

      assert_equal(( 13/5), ( 13/5).round(2))
      assert_equal((  5/2), (  5/2).round(2))
      assert_equal(( 12/5), ( 12/5).round(2))
      assert_equal((-12/5), (-12/5).round(2))
      assert_equal(( -5/2), ( -5/2).round(2))
      assert_equal((-13/5), (-13/5).round(2))
    EOS
  end
end
