Class: RandArrayTest

Inherits:
Test::Unit::TestCase
  • Object
show all
Includes:
RandTestHelpers
Defined in:
lib/rand.rb

Overview

:nodoc:

Instance Method Summary collapse

Methods included from RandTestHelpers

#picker, #try_shuffling

Instance Method Details

#ar ⇒ Object 



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# File 'lib/rand.rb', line 257

def ar
  (0..99).to_a
end

#test_pick ⇒ Object 



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# File 'lib/rand.rb', line 261

def test_pick
  a = ar
  results = (0...a.size).map{ a.pick }
  assert true, results.all? {|r| a.include? r }
end

#test_pick! ⇒ Object 



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# File 'lib/rand.rb', line 267

def test_pick!
  a = ar
  results = (0...a.size).map{ a.pick! }
  assert true, results.sort == (0..99).to_a and a.empty?
end

#test_pick_index ⇒ Object 



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# File 'lib/rand.rb', line 273

def test_pick_index
  a = ar
  results = (0...a.size).map{ a.pick_index }
  assert true, results.all? {|r| r.between?(0, a.size-1) }
end

#test_pick_index! ⇒ Object 



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# File 'lib/rand.rb', line 279

def test_pick_index!
  a = ar
  # side-effect-relying block; a.size = a.size-1 after pick_index!,
  # so the picked index max value is the new a.size
  assert true, (0...a.size).all?{ a.pick_index!.between?(0, a.size) } and a.empty?
end

#test_shuffle ⇒ Object 



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# File 'lib/rand.rb', line 286

def test_shuffle
  a = ar
  shuffled = try_shuffling(a, a, :shuffle)
  assert true, shuffled.sort == a and shuffled != a
end

#test_shuffle! ⇒ Object 



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# File 'lib/rand.rb', line 292

def test_shuffle!
  a = ar
  try_shuffling(a, ar, :shuffle!)
  assert true, a != ar and a.sort == ar
end