require 'test/unit'

require 'envelope'

class TC_Envelope < Test::Unit::TestCase
  
  def test_count
    base = BaseEnvelope.new
    assert(base.count == 0)
  end

  def test_empty
    envelope = Envelope.new
    assert(envelope.count == 0)
    assert_raise(EnvelopeException) { envelope.high }
    assert_raise(EnvelopeException) { envelope.low }
  end
  
  def test_add_numbers
    envelope = Envelope.new
    envelope.add 1
    assert(envelope.high == 1)
    assert(envelope.low == 1)
    assert(envelope.count == 1)
    envelope.add 2
    envelope.add(-3)
    envelope.add 4.5
    assert(envelope.high == 4.5)
    assert(envelope.low == -3)
    assert(envelope.count == 4)
    envelope.add envelope
    assert(envelope.high == 4.5)
    assert(envelope.low == -3)
    assert(envelope.count == 8)
    assert_raise(EnvelopeException) { envelope.add "bad" }
    assert(envelope.count == 8)
    envelope = Envelope.new
  end
  
  def test_add_letters
    envelope = Envelope.new('c').add('m').add('e')
    assert(envelope.low == 'c')
    assert(envelope.high == 'm')
    assert(envelope.contains?('d'))
    assert(!(envelope.contains?('a')))
    assert(!(envelope.contains?('r')))
    assert(envelope.contains?(envelope))
    assert(envelope.contains?(Envelope.new('e').add('h')))
    assert(!(envelope.contains?(Envelope.new('a').add('h'))))
    assert(!(envelope.contains?(Envelope.new('e').add('s'))))
    assert(envelope === 'd')
    assert(!(envelope === 'a'))
    assert(!(envelope === 'r'))
    assert(envelope === envelope)
    assert(envelope === Envelope.new('e').add('h'))
    assert(!(envelope === Envelope.new('a').add('h')))
    assert(!(envelope === Envelope.new('e').add('s')))
    range = envelope.to_range
    assert(range === 'd')
    assert(!(range === 'a'))
    assert(!(range === 'r'))
  end

  def test_add_strings
    envelope = Envelope.new("carl").add("marie").add("edward")
    assert(envelope.low == "carl")
    assert(envelope.high == "marie")
    assert(envelope.contains?("dennis"))
    assert(!(envelope.contains?("aaron")))
    assert(!(envelope.contains?("ralph")))
    assert(envelope.contains?(envelope))
    assert(envelope.contains?(Envelope.new("edward").add("harry")))
    assert(!(envelope.contains?(Envelope.new("aaron").add("harry"))))
    assert(!(envelope.contains?(Envelope.new("edward").add("sally"))))
    range = envelope.to_range
    assert(range === "dennis")
    assert(!(range === "aaron"))
    assert(!(range === "ralph"))
  end

  def test_contains
    envelope = Envelope.new(0.75).add(3)
    assert(envelope.contains?(1))
    assert(envelope.contains?(3))
    assert(envelope.contains?(2))
    assert(!(envelope.contains?(0)))
    assert(!(envelope.contains?(4)))
    assert(envelope.contains?(envelope))
    assert(envelope.contains?(Envelope.new(1.5).add(2.5)))
    assert(!(envelope.contains?(Envelope.new(0.5).add(2.5))))
    assert(!(envelope.contains?(Envelope.new(1.5).add(3.5))))
    assert_raise(EnvelopeException) { envelope.add "bad" }
    range = envelope.to_range
    assert(range === 2.5)
    assert(!(range === 0))
    assert(!(range === 4))
  end

end