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2aeb3b47ee
Random::DEFAULT.rand rather than Kernel#rand. * random.c (rand_range, random_rand): rand_range function extracted from random_rand function. * random.c (rb_f_rand): accept a Range argument as Random#rand [ruby-dev:43427] #4605 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31340 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
454 lines
17 KiB
Ruby
454 lines
17 KiB
Ruby
require 'test/unit'
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class TestRand < Test::Unit::TestCase
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def assert_random_int(ws, m, init = 0)
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srand(init)
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rnds = [Random.new(init)]
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rnds2 = [rnds[0].dup]
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rnds3 = [rnds[0].dup]
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ws.each_with_index do |w, i|
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w = w.to_i
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assert_equal(w, rand(m))
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rnds.each do |rnd|
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assert_equal(w, rnd.rand(m))
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end
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rnds2.each do |rnd|
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r=rnd.rand(i...(m+i))
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assert_equal(w+i, r)
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end
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rnds3.each do |rnd|
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r=rnd.rand(i..(m+i-1))
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assert_equal(w+i, r)
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end
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rnds << Marshal.load(Marshal.dump(rnds[-1]))
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rnds2 << Marshal.load(Marshal.dump(rnds2[-1]))
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end
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end
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def test_mt
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assert_random_int(%w(1067595299 955945823 477289528 4107218783 4228976476),
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0x100000000, 0x00000456_00000345_00000234_00000123)
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end
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def test_0x3fffffff
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assert_random_int(%w(209652396 398764591 924231285 404868288 441365315),
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0x3fffffff)
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end
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def test_0x40000000
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assert_random_int(%w(209652396 398764591 924231285 404868288 441365315),
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0x40000000)
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end
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def test_0x40000001
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assert_random_int(%w(209652396 398764591 924231285 441365315 192771779),
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0x40000001)
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end
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def test_0xffffffff
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assert_random_int(%w(2357136044 2546248239 3071714933 3626093760 2588848963),
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0xffffffff)
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end
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def test_0x100000000
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assert_random_int(%w(2357136044 2546248239 3071714933 3626093760 2588848963),
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0x100000000)
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end
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def test_0x100000001
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assert_random_int(%w(2546248239 1277901399 243580376 1171049868 2051556033),
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0x100000001)
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end
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def test_rand_0x100000000
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assert_random_int(%w(4119812344 3870378946 80324654 4294967296 410016213),
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0x100000001, 311702798)
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end
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def test_0x1000000000000
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assert_random_int(%w(11736396900911
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183025067478208
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197104029029115
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130583529618791
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180361239846611),
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0x1000000000000)
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end
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def test_0x1000000000001
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assert_random_int(%w(187121911899765
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197104029029115
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180361239846611
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236336749852452
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208739549485656),
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0x1000000000001)
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end
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def test_0x3fffffffffffffff
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assert_random_int(%w(900450186894289455
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3969543146641149120
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1895649597198586619
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827948490035658087
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3203365596207111891),
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0x3fffffffffffffff)
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end
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def test_0x4000000000000000
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assert_random_int(%w(900450186894289455
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3969543146641149120
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1895649597198586619
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827948490035658087
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3203365596207111891),
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0x4000000000000000)
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end
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def test_0x4000000000000001
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assert_random_int(%w(900450186894289455
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3969543146641149120
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1895649597198586619
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827948490035658087
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2279347887019741461),
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0x4000000000000001)
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end
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def test_0x10000000000
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ws = %w(455570294424 1073054410371 790795084744 2445173525 1088503892627)
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assert_random_int(ws, 0x10000000000, 3)
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end
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def test_0x10000
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ws = %w(2732 43567 42613 52416 45891)
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assert_random_int(ws, 0x10000)
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end
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def test_types
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srand(0)
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rnd = Random.new(0)
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assert_equal(44, rand(100.0))
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assert_equal(44, rnd.rand(100))
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assert_equal(1245085576965981900420779258691, rand((2**100).to_f))
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assert_equal(1245085576965981900420779258691, rnd.rand(2**100))
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assert_equal(914679880601515615685077935113, rand(-(2**100).to_f))
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srand(0)
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rnd = Random.new(0)
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assert_equal(997707939797331598305742933184, rand(2**100))
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assert_equal(997707939797331598305742933184, rnd.rand(2**100))
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assert_in_delta(0.602763376071644, rand((2**100).coerce(0).first),
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0.000000000000001)
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assert_raise(ArgumentError) {rnd.rand((2**100).coerce(0).first)}
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srand(0)
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rnd = Random.new(0)
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assert_in_delta(0.548813503927325, rand(nil),
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0.000000000000001)
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assert_in_delta(0.548813503927325, rnd.rand(),
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0.000000000000001)
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srand(0)
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rnd = Random.new(0)
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o = Object.new
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def o.to_int; 100; end
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assert_equal(44, rand(o))
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assert_equal(44, rnd.rand(o))
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assert_equal(47, rand(o))
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assert_equal(47, rnd.rand(o))
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assert_equal(64, rand(o))
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assert_equal(64, rnd.rand(o))
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end
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def test_srand
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srand
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assert_kind_of(Integer, rand(2))
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assert_kind_of(Integer, Random.new.rand(2))
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srand(2**100)
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rnd = Random.new(2**100)
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%w(3258412053).each {|w|
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assert_equal(w.to_i, rand(0x100000000))
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assert_equal(w.to_i, rnd.rand(0x100000000))
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}
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end
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def test_shuffle
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srand(0)
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assert_equal([1,4,2,5,3], [1,2,3,4,5].shuffle)
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assert_equal([1,4,2,5,3], [1,2,3,4,5].shuffle(random: Random.new(0)))
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end
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def test_big_seed
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assert_random_int(%w(1143843490), 0x100000000, 2**1000000-1)
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end
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def test_random_gc
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r = Random.new(0)
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%w(2357136044 2546248239 3071714933).each do |w|
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assert_equal(w.to_i, r.rand(0x100000000))
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end
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GC.start
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%w(3626093760 2588848963 3684848379).each do |w|
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assert_equal(w.to_i, r.rand(0x100000000))
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end
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end
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def test_random_type_error
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assert_raise(TypeError) { Random.new(Object.new) }
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assert_raise(TypeError) { Random.new(0).rand(Object.new) }
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end
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def test_random_argument_error
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r = Random.new(0)
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assert_raise(ArgumentError) { r.rand(0, 0) }
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assert_raise(ArgumentError, '[ruby-core:24677]') { r.rand(-1) }
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assert_raise(ArgumentError, '[ruby-core:24677]') { r.rand(-1.0) }
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assert_raise(ArgumentError, '[ruby-core:24677]') { r.rand(0) }
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assert_equal(0, r.rand(1), '[ruby-dev:39166]')
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assert_equal(0, r.rand(0...1), '[ruby-dev:39166]')
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assert_equal(0, r.rand(0..0), '[ruby-dev:39166]')
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assert_equal(0.0, r.rand(0.0..0.0), '[ruby-dev:39166]')
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assert_raise(ArgumentError, '[ruby-dev:39166]') { r.rand(0...0) }
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assert_raise(ArgumentError, '[ruby-dev:39166]') { r.rand(0..-1) }
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assert_raise(ArgumentError, '[ruby-dev:39166]') { r.rand(0.0...0.0) }
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assert_raise(ArgumentError, '[ruby-dev:39166]') { r.rand(0.0...-0.1) }
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assert_raise(ArgumentError, bug3027 = '[ruby-core:29075]') { r.rand(nil) }
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end
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def test_random_seed
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assert_equal(0, Random.new(0).seed)
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assert_equal(0x100000000, Random.new(0x100000000).seed)
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assert_equal(2**100, Random.new(2**100).seed)
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end
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def test_random_dup
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r1 = Random.new(0)
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r2 = r1.dup
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%w(2357136044 2546248239 3071714933).each do |w|
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assert_equal(w.to_i, r1.rand(0x100000000))
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end
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%w(2357136044 2546248239 3071714933).each do |w|
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assert_equal(w.to_i, r2.rand(0x100000000))
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end
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r2 = r1.dup
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%w(3626093760 2588848963 3684848379).each do |w|
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assert_equal(w.to_i, r1.rand(0x100000000))
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end
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%w(3626093760 2588848963 3684848379).each do |w|
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assert_equal(w.to_i, r2.rand(0x100000000))
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end
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end
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def test_random_state
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state = <<END
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3877134065023083674777481835852171977222677629000095857864323111193832400974413
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4782302161934463784850675209112299537259006497924090422596764895633625964527441
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6943943249411681406395713106007661119327771293929504639878577616749110507385924
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0173026285378896836022134086386136835407107422834685854738117043791709411958489
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3504364936306163473541948635570644161010981140452515307286926529085424765299100
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1255453260115310687580777474046203049197643434654645011966794531914127596390825
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0832232869378617194193100828000236737535657699356156021286278281306055217995213
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8911536025132779573429499813926910299964681785069915877910855089314686097947757
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2621451199734871158015842198110309034467412292693435515184023707918034746119728
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8223459645048255809852819129671833854560563104716892857257229121211527031509280
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2390605053896565646658122125171846129817536096211475312518457776328637574563312
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8113489216547503743508184872149896518488714209752552442327273883060730945969461
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6568672445225657265545983966820639165285082194907591432296265618266901318398982
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0560425129536975583916120558652408261759226803976460322062347123360444839683204
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9868507788028894111577023917218846128348302845774997500569465902983227180328307
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3735301552935104196244116381766459468172162284042207680945316590536094294865648
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5953156978630954893391701383648157037914019502853776972615500142898763385846315
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8457790690531675205213829055442306187692107777193071680668153335688203945049935
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3404449910419303330872435985327845889440458370416464132629866593538629877042969
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7589948685901343135964343582727302330074331803900821801076139161904900333497836
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6627028345784450211920229170280462474456504317367706849373957309797251052447898
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8436235456995644876515032202483449807136139063937892187299239634252391529822163
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9187055268750679730919937006195967184206072757082920250075756273182004964087790
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3812024063897424219316687828337007888030994779068081666133751070479581394604974
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6022215489604777611774245181115126041390161592199230774968475944753915533936834
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4740049163514318351045644344358598159463605453475585370226041981040238023241538
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4958436364776113598408428801867643946791659645708540669432995503575075657406359
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8086928867900590554805639837071298576728564946552163206007997000988745940681607
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4542883814997403673656291618517107133421335645430345871041730410669209035640945
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5024601618318371192091626092482640364669969307766919645222516407626038616667754
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5781148898846306894862390724358039251444333889446128074209417936830253204064223
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3424784857908022314095011879203259864909560830176189727132432100010493659154644
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8407326292884826469503093409465946018496358514999175268200846200025235441426140
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7783386235191526371372655894290440356560751680752191224383460972099834655086068
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9989413443881686756951804138910911737670495391762470293978321414964443502180391
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4665982575919524372985773336921990352313629822677022891307943536442258282401255
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5387646898976193134193506239982621725093291970351083631367582570375381334759004
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1784150668048523676387894646666460369896619585113435743180899362844070393586212
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5023920017185866399742380706352739465848708746963693663004068892056705603018655
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8686663087894205699555906146534549176352859823832196938386172810274748624517052
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8356758650653040545267425513047130342286119889879774951060662713807133125543465
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5104086026298674827575216701372513525846650644773241437066782037334367982012148
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7987782004646896468089089826267467005660035604553432197455616078731159778086155
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9443250946037119223468305483694093795324036812927501783593256716590840500905291
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2096608538205270323065573109227029887731553399324547696295234105140157179430410
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4003109602564833086703863221058381556776789018351726488797845637981974580864082
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1630093543020854542240690897858757985640869209737744458407777584279553258261599
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0246922348101147034463235613998979344685018577901996218099622190722307356620796
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5137485271371502385527388080824050288371607602101805675021790116223360483508538
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8832149997794718410946818866375912486788005950091851067237358294899771385995876
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7088239104394332452501033090159333224995108984871426750597513314521294001864578
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2353528356752869732412552685554334966798888534847483030947310518891788722418172
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6008607577773612004956373863580996793809969715725508939568919714424871639667201
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7922255031431159347210833846575355772055570279673262115911154370983086189948124
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4653677615895887099814174914248255026619941911735341818489822197472499295786997
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7728418516719104857455960900092226749725407204388193002835497055305427730656889
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1508308778869166073740855838213112709306743479676740893150000714099064468263284
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1873435518542972182497755500300784177067568586395485329021157235696300013490087
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2866571034916258390528533374944905429089028336079264760836949419754851422499614
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5732326011260304142074554782259843903215064144396140106592193961703288125005023
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5334375212799817540775536847622032852415253966587517800661605905489339306359573
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2234947905196298436841723673626428243649931398749552780311877734063703985375067
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1239508613417041942487245370152912391885566432830659640677893488723724763120121
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4111855277511356759926232894062814360449757490961653026194107761340614059045172
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1123363102660719217740126157997033682099769790976313166682432732518101889210276
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9574144065390305904944821051736021310524344626348851573631697771556587859836330
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6997324121866564283654784470215100159122764509197570402997911258816526554863326
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9877535269005418736225944874608987238997316999444215865249840762640949599725696
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0773083894168959823152054508672272612355108904098579447774398451678239199426513
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3439507737424049578587487505080347686371029156845461151278198605267053408259090
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3158676794894709281917034995611352710898103415304769654883981727681820369090169
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9295163908214854813365413456264812190842699054830709079275249714169405719140093
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1347572458245530016346604698682269779841803667099480215265926316505737171177810
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9969036572310084022695109125200937135540995157279354438704321290061646592229860
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0156566013602344870223183295508278359111174872740360473845615437106413256386849
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2286259982118315248148847764929974917157683083659364623458927512616369119194574
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2254080
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END
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state = state.split.join.to_i
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r = Random.new(0)
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srand(0)
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assert_equal(state, r.instance_eval { state })
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assert_equal(state, Random.instance_eval { state })
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r.rand(0x100)
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assert_equal(state, r.instance_eval { state })
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end
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def test_random_left
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r = Random.new(0)
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assert_equal(1, r.instance_eval { left })
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r.rand(0x100)
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assert_equal(624, r.instance_eval { left })
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r.rand(0x100)
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assert_equal(623, r.instance_eval { left })
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srand(0)
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assert_equal(1, Random.instance_eval { left })
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rand(0x100)
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assert_equal(624, Random.instance_eval { left })
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rand(0x100)
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assert_equal(623, Random.instance_eval { left })
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end
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def test_random_bytes
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r = Random.new(0)
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assert_equal("", r.bytes(0))
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assert_equal("\xAC".force_encoding("ASCII-8BIT"), r.bytes(1))
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assert_equal("/\xAA\xC4\x97u\xA6\x16\xB7\xC0\xCC".force_encoding("ASCII-8BIT"), r.bytes(10))
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end
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def test_random_range
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srand(0)
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r = Random.new(0)
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%w(9 5 8).each {|w|
|
|
assert_equal(w.to_i, rand(5..9))
|
|
assert_equal(w.to_i, r.rand(5..9))
|
|
}
|
|
%w(-237 731 383).each {|w|
|
|
assert_equal(w.to_i, rand(-1000..1000))
|
|
assert_equal(w.to_i, r.rand(-1000..1000))
|
|
}
|
|
%w(1267650600228229401496703205382
|
|
1267650600228229401496703205384
|
|
1267650600228229401496703205383).each do |w|
|
|
assert_equal(w.to_i, rand(2**100+5..2**100+9))
|
|
assert_equal(w.to_i, r.rand(2**100+5..2**100+9))
|
|
end
|
|
|
|
v = rand(3.1..4)
|
|
assert_instance_of(Float, v, '[ruby-core:24679]')
|
|
assert_include(3.1..4, v)
|
|
|
|
v = r.rand(3.1..4)
|
|
assert_instance_of(Float, v, '[ruby-core:24679]')
|
|
assert_include(3.1..4, v)
|
|
|
|
now = Time.now
|
|
assert_equal(now, rand(now..now))
|
|
assert_equal(now, r.rand(now..now))
|
|
end
|
|
|
|
def test_random_float
|
|
r = Random.new(0)
|
|
assert_in_delta(0.5488135039273248, r.rand, 0.0001)
|
|
assert_in_delta(0.7151893663724195, r.rand, 0.0001)
|
|
assert_in_delta(0.6027633760716439, r.rand, 0.0001)
|
|
assert_in_delta(1.0897663659937937, r.rand(2.0), 0.0001)
|
|
assert_in_delta(5.3704626067153264e+29, r.rand((2**100).to_f), 10**25)
|
|
|
|
assert_raise(Errno::EDOM, Errno::ERANGE) { r.rand(1.0 / 0.0) }
|
|
assert_raise(Errno::EDOM, Errno::ERANGE) { r.rand(0.0 / 0.0) }
|
|
|
|
r = Random.new(0)
|
|
assert_in_delta(1.5488135039273248, r.rand(1.0...2.0), 0.0001, '[ruby-core:24655]')
|
|
assert_in_delta(1.7151893663724195, r.rand(1.0...2.0), 0.0001, '[ruby-core:24655]')
|
|
assert_in_delta(7.027633760716439, r.rand(1.0...11.0), 0.0001, '[ruby-core:24655]')
|
|
assert_in_delta(3.0897663659937937, r.rand(2.0...4.0), 0.0001, '[ruby-core:24655]')
|
|
|
|
assert_nothing_raised {r.rand(-Float::MAX..Float::MAX)}
|
|
end
|
|
|
|
def test_random_equal
|
|
r = Random.new(0)
|
|
assert(r == r)
|
|
assert(r == r.dup)
|
|
r1 = r.dup
|
|
r2 = r.dup
|
|
r1.rand(0x100)
|
|
assert(r1 != r2)
|
|
r2.rand(0x100)
|
|
assert(r1 == r2)
|
|
end
|
|
|
|
def test_fork_shuffle
|
|
pid = fork do
|
|
(1..10).to_a.shuffle
|
|
raise 'default seed is not set' if srand == 0
|
|
end
|
|
p2, st = Process.waitpid2(pid)
|
|
assert(st.success?, "#{st.inspect}")
|
|
rescue NotImplementedError, ArgumentError
|
|
end
|
|
|
|
def test_seed
|
|
bug3104 = '[ruby-core:29292]'
|
|
rand_1 = Random.new(-1).rand
|
|
assert_not_equal(rand_1, Random.new((1 << 31) -1).rand, "#{bug3104} (2)")
|
|
assert_not_equal(rand_1, Random.new((1 << 63) -1).rand, "#{bug3104} (2)")
|
|
|
|
[-1, -2**10, -2**40].each {|n|
|
|
b = (2**64).coerce(n)[0]
|
|
r1 = Random.new(n).rand
|
|
r2 = Random.new(b).rand
|
|
assert_equal(r1, r2)
|
|
}
|
|
end
|
|
|
|
def test_default
|
|
r1 = Random::DEFAULT.dup
|
|
r2 = Random::DEFAULT.dup
|
|
3.times do
|
|
x0 = rand
|
|
x1 = r1.rand
|
|
x2 = r2.rand
|
|
assert_equal(x0, x1)
|
|
assert_equal(x0, x2)
|
|
end
|
|
end
|
|
|
|
def test_marshal
|
|
bug3656 = '[ruby-core:31622]'
|
|
assert_raise(TypeError, bug3656) {
|
|
Random.new.marshal_load(0)
|
|
}
|
|
end
|
|
end
|