test/ruby/test_range.rb


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require 'test/unit'

class TestRange < Test::Unit::TestCase
  def test_range_string
    # XXX: Is this really the test of Range?
    assert_equal([], ("a" ... "a").to_a)
    assert_equal(["a"], ("a" .. "a").to_a)
    assert_equal(["a"], ("a" ... "b").to_a)
    assert_equal(["a", "b"], ("a" .. "b").to_a)
  end

  def test_evaluation_order
    arr = [1,2]
    r = (arr.shift)..(arr.shift)
    assert_equal(1..2, r, "[ruby-dev:26383]")
  end

  class DuckRange
    def initialize(b,e,excl=false)
      @begin = b
      @end = e
      @excl = excl
    end
    attr_reader :begin, :end

    def exclude_end?
      @excl
    end
  end

  def test_duckrange
    assert_equal("bc", "abcd"[DuckRange.new(1,2)])
  end
end