# frozen_string_literal: false
require 'test/unit'

# mathn redefines too much. It must be isolated to child processes.
class TestMathn < Test::Unit::TestCase
  def test_power
    stderr = $VERBOSE ? ["lib/mathn.rb is deprecated"] : []
    assert_in_out_err ['-r', 'mathn', '-e', 'a=1**2;!a'], "", [], stderr, '[ruby-core:25740]'
    assert_in_out_err ['-r', 'mathn', '-e', 'a=(1 << 126)**2;!a'], "", [], stderr, '[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_quo
    stderr = $VERBOSE ? ["lib/mathn.rb is deprecated"] : []
    assert_in_out_err ['-r', 'mathn'], <<-EOS, %w(OK), stderr, '[ruby-core:41575]'
      1.quo(2); puts :OK
    EOS
  end

  def test_floor
    assert_separately(%w[-rmathn], <<-EOS, ignore_stderr: true)
      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, ignore_stderr: true)
      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, ignore_stderr: true)
      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, ignore_stderr: true)
      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))

      assert_equal( 3, ( 13/5).round(half: :even))
      assert_equal( 2, (  5/2).round(half: :even))
      assert_equal( 2, ( 12/5).round(half: :even))
      assert_equal(-2, (-12/5).round(half: :even))
      assert_equal(-2, ( -5/2).round(half: :even))
      assert_equal(-3, (-13/5).round(half: :even))

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

      assert_equal(( 13/5), ( 13/5).round(2, half: :even))
      assert_equal((  5/2), (  5/2).round(2, half: :even))
      assert_equal(( 12/5), ( 12/5).round(2, half: :even))
      assert_equal((-12/5), (-12/5).round(2, half: :even))
      assert_equal(( -5/2), ( -5/2).round(2, half: :even))
      assert_equal((-13/5), (-13/5).round(2, half: :even))

      assert_equal( 3, ( 13/5).round(half: :up))
      assert_equal( 3, (  5/2).round(half: :up))
      assert_equal( 2, ( 12/5).round(half: :up))
      assert_equal(-2, (-12/5).round(half: :up))
      assert_equal(-3, ( -5/2).round(half: :up))
      assert_equal(-3, (-13/5).round(half: :up))

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

      assert_equal(( 13/5), ( 13/5).round(2, half: :up))
      assert_equal((  5/2), (  5/2).round(2, half: :up))
      assert_equal(( 12/5), ( 12/5).round(2, half: :up))
      assert_equal((-12/5), (-12/5).round(2, half: :up))
      assert_equal(( -5/2), ( -5/2).round(2, half: :up))
      assert_equal((-13/5), (-13/5).round(2, half: :up))

      assert_equal( 3, ( 13/5).round(half: :down))
      assert_equal( 2, (  5/2).round(half: :down))
      assert_equal( 2, ( 12/5).round(half: :down))
      assert_equal(-2, (-12/5).round(half: :down))
      assert_equal(-2, ( -5/2).round(half: :down))
      assert_equal(-3, (-13/5).round(half: :down))

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

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

  def test_rational
    assert_separately(%w[-rmathn], "#{<<-"begin;"}\n#{<<-"end;"}", ignore_stderr: true)
    begin;
      assert_equal(-5, "-5".to_r)
      assert_equal(1, "5/5".to_r)
      assert_equal(5, "5e0".to_r)
    end;
  end
end
