require 'test/unit'
require 'test/framework'

require 'units'

class TC_uses_2 < Test::Unit::TestCase
  
  understands UnitsTest

  def load_units
    
    Units.create :length do |m|
      m.system :english do |s|
        s.unit :name => :inch, :plural => :inches, :abbrev => :in
        s.unit :name => :foot, :plural => :feet, :abbrev => :ft,
               :equals => 12.inches
        s.unit :name => :yard, :abbrevs => :yd, :equals => 3.feet
        s.unit :name => :mile, :abbrevs => :mi, :equals => 1760.yards
      end
    end

    Units.create :time do |m|
      m.system :base do |s|
        s.unit :name => :second, :abbrev => :sec
        s.unit :name => :minute, :abbrev => :min, :equals => 60.seconds
        s.unit :name => :hour, :abbrev => :hr, :equals => 60.minutes
        s.unit :name => :day, :abbrev => :dy, :equals => 24.hours
      end
    end

  end

  
  def test_use_2_convert

    load_units

    foot = 1.foot
    mile = 1.mile

    d = 140.miles
    assert(d.convert(mile).to_s == '140.0 miles')
    assert(d.convert(foot).to_s == '739200.0 feet')
    assert(d.convert(1.yard).to_s == '246400.0 yards')

    second = 1.second
    hour = 1.hour

    t = 2.hours + 35.minutes
    assert(t.convert(hour).to_s == '2.58333333333333 hours')
    assert(t.convert(second).to_s == '9300.0 seconds')

    r = d/t
    assert(r.to_s == '0.903225806451613 mi / min')
    assert(r.convert([mile, hour]).to_s == '54.1935483870968 mi / hr')
    assert(r.convert([foot, second]).to_s == '79.4838709677419 ft / sec')
    
    fps = [foot,second]
    mph = [mile,hour]
    
    assert(r.convert(fps).to_s == '79.4838709677419 ft / sec')
    assert(r.convert(mph).to_s == '54.1935483870968 mi / hr')
    
    assert((5.days * r).to_s == '6503.22580645161 miles')
 
  end

  def test_use_2_to
    
    load_units

    r = 55.feet / 1.second
   
    assert(r.to_s == '55 ft / sec')
    r.to_miles_and_hours
    assert(r.to_s == '37.5 mi / hr')
    
  end

  def test_use_2_in
    
    load_units

    r1 = 55.feet / 1.second
   
    assert(r1.to_s == '55 ft / sec')
    r2 = r1.in_miles_and_hours
    assert(r1.to_s == '55 ft / sec')
    assert(r2.to_s == '37.5 mi / hr')
    
  end
  
  def test_use_2_per
    
    load_units
    
    r1 = 55.ft/1.sec
    
    assert(r1.miles_per_hour.to_s == '37.5 mi / hr')
    assert(r1.minutes_per_mile.to_s == '1.6 min / mi')
    
  end

  def test_use_2_in_implicit
    
    load_units

    r1 = 55.feet / 1.second
   
    assert(r1.to_s == '55 ft / sec')
    r2 = r1.miles_and_hours
    assert(r1.to_s == '55 ft / sec')
    assert(r2.to_s == '37.5 mi / hr')
    assert(102.inches.feet.to_s == '8.5 feet')
    
  end

  def test_use_2_object_unite

    load_units
    
    r1 = 55.ft/sec
    
    assert(r1.miles_per_hour.to_s == '37.5 mi / hr')
    assert(r1.minutes_per_mile.to_s == '1.6 min / mi')
    
  end
  
  def test_use_2_numeric_unite_per

    load_units
    
    r1 = 55.feet_per_second
    
    assert(r1.miles_per_hour.to_s == '37.5 mi / hr')
    assert(r1.minutes_per_mile.to_s == '1.6 min / mi')
    
  end
  
  def test_use_2_object_per

    load_units
    
    r1 = feet_per_mile
    assert(r1.to_s == '5280.0')
    
  end
  
end