ruby--ruby/test/ruby/test_hash.rb

require 'test/unit'

$KCODE = 'none'

class TestHash < Test::Unit::TestCase
  def test_hash
    $x = {1=>2, 2=>4, 3=>6}
    $y = {1, 2, 2, 4, 3, 6}
    
    assert_equal($x[1], 2)
    
    assert(begin   
         for k,v in $y
           raise if k*2 != v
         end
         true
       rescue
         false
       end)
    
    assert_equal($x.length, 3)
    assert($x.has_key?(1))
    assert($x.has_value?(4))
    assert_equal($x.values_at(2,3), [4,6])
    assert_equal($x, {1=>2, 2=>4, 3=>6})
    
    $z = $y.keys.join(":")
    assert_equal($z, "1:2:3")
    
    $z = $y.values.join(":")
    assert_equal($z, "2:4:6")
    assert_equal($x, $y)
    
    $y.shift
    assert_equal($y.length, 2)
    
    $z = [1,2]
    $y[$z] = 256
    assert_equal($y[$z], 256)
    
    $x = Hash.new(0)
    $x[1] = 1
    assert_equal($x[1], 1)
    assert_equal($x[2], 0)
    
    $x = Hash.new([])
    assert_equal($x[22], [])
    assert($x[22].equal?($x[22]))
    
    $x = Hash.new{[]}
    assert_equal($x[22], [])
    assert(!$x[22].equal?($x[22]))
    
    $x = Hash.new{|h,k| $z = k; h[k] = k*2}
    $z = 0
    assert_equal($x[22], 44)
    assert_equal($z, 22)
    $z = 0
    assert_equal($x[22], 44)
    assert_equal($z, 0)
    $x.default = 5
    assert_equal($x[23], 5)
    
    $x = Hash.new
    def $x.default(k)
      $z = k
      self[k] = k*2
    end
    $z = 0
    assert_equal($x[22], 44)
    assert_equal($z, 22)
    $z = 0
    assert_equal($x[22], 44)
    assert_equal($z, 0)
  end
end