require 'test/unit'

require 'eymiha/math/rectify'

class TC_rectify < Test::Unit::TestCase

  def test_wrap_rectify
    assert(0.5.wrap_rectify(1) == 0.5)
    assert(5.5.wrap_rectify(1) =~ 0.5)
    assert(-7.25.wrap_rectify(2) =~ 0.75)
    assert(-7.25.wrap_rectify(2,0.5) =~ 1.75)
    assert(-7.25.wrap_rectify(0.5,2) =~ 1.75)
    assert(2.wrap_rectify(0.5,2) == 0.5)
    assert(0.5.wrap_rectify(0.5,2) == 0.5)
    assert(0.5.wrap_rectify(0,0) == 0)
  end
  
  def test_cut_rectify
    assert(0.5.cut_rectify(1) == 0.5)
    assert(5.5.cut_rectify(1) == 1)
    assert(-7.25.cut_rectify(2) == 0)
    assert(-7.25.cut_rectify(2,0.5) == 0.5)
    assert(-7.25.cut_rectify(0.5,2) == 0.5)
    assert(2.cut_rectify(0.5,2) == 2)
    assert(0.5.cut_rectify(0.5,2) == 0.5)
    assert(0.5.cut_rectify(0,0) == 0)
  end

  def test_at_most
    assert((-5..5).collect{|v| v.at_most(2)} ==
           [-5,-4,-3,-2,-1,0,1,2,2,2,2])
  end
  
  def test_at_least
    assert((-5..5).collect{|v| v.at_least(-1.5)} ==
           [-1.5,-1.5,-1.5,-1.5,-1,0,1,2,3,4,5])
  end
  
end