diff options
Diffstat (limited to 'trunk/test/ruby/test_rand.rb')
-rw-r--r-- | trunk/test/ruby/test_rand.rb | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/trunk/test/ruby/test_rand.rb b/trunk/test/ruby/test_rand.rb new file mode 100644 index 0000000000..b7d841dbba --- /dev/null +++ b/trunk/test/ruby/test_rand.rb @@ -0,0 +1,167 @@ +require 'test/unit' + +class TestRand < Test::Unit::TestCase + def test_mt + srand(0x00000456_00000345_00000234_00000123) + %w(1067595299 955945823 477289528 4107218783 4228976476).each {|w| + assert_equal(w.to_i, rand(0x100000000)) + } + end + + def test_0x3fffffff + srand(0) + %w(209652396 398764591 924231285 404868288 441365315).each {|w| + assert_equal(w.to_i, rand(0x3fffffff)) + } + end + + def test_0x40000000 + srand(0) + %w(209652396 398764591 924231285 404868288 441365315).each {|w| + assert_equal(w.to_i, rand(0x40000000)) + } + end + + def test_0x40000001 + srand(0) + %w(209652396 398764591 924231285 441365315 192771779).each {|w| + assert_equal(w.to_i, rand(0x40000001)) + } + end + + def test_0xffffffff + srand(0) + %w(2357136044 2546248239 3071714933 3626093760 2588848963).each {|w| + assert_equal(w.to_i, rand(0xffffffff)) + } + end + + def test_0x100000000 + srand(0) + %w(2357136044 2546248239 3071714933 3626093760 2588848963).each {|w| + assert_equal(w.to_i, rand(0x100000000)) + } + end + + def test_0x100000001 + srand(0) + %w(2546248239 1277901399 243580376 1171049868 2051556033).each {|w| + assert_equal(w.to_i, rand(0x100000001)) + } + end + + def test_rand_0x100000000 + srand(311702798) + %w(4119812344 3870378946 80324654 4294967296 410016213).each {|w| + assert_equal(w.to_i, rand(0x100000001)) + } + end + + def test_0x1000000000000 + srand(0) + %w(11736396900911 + 183025067478208 + 197104029029115 + 130583529618791 + 180361239846611).each {|w| + assert_equal(w.to_i, rand(0x1000000000000)) + } + end + + def test_0x1000000000001 + srand(0) + %w(187121911899765 + 197104029029115 + 180361239846611 + 236336749852452 + 208739549485656).each {|w| + assert_equal(w.to_i, rand(0x1000000000001)) + } + end + + def test_0x3fffffffffffffff + srand(0) + %w(900450186894289455 + 3969543146641149120 + 1895649597198586619 + 827948490035658087 + 3203365596207111891).each {|w| + assert_equal(w.to_i, rand(0x3fffffffffffffff)) + } + end + + def test_0x4000000000000000 + srand(0) + %w(900450186894289455 + 3969543146641149120 + 1895649597198586619 + 827948490035658087 + 3203365596207111891).each {|w| + assert_equal(w.to_i, rand(0x4000000000000000)) + } + end + + def test_0x4000000000000001 + srand(0) + %w(900450186894289455 + 3969543146641149120 + 1895649597198586619 + 827948490035658087 + 2279347887019741461).each {|w| + assert_equal(w.to_i, rand(0x4000000000000001)) + } + end + + def test_neg_0x10000000000 + ws = %w(455570294424 1073054410371 790795084744 2445173525 1088503892627) + srand(3) + ws.each {|w| assert_equal(w.to_i, rand(0x10000000000)) } + srand(3) + ws.each {|w| assert_equal(w.to_i, rand(-0x10000000000)) } + end + + def test_neg_0x10000 + ws = %w(2732 43567 42613 52416 45891) + srand(0) + ws.each {|w| assert_equal(w.to_i, rand(0x10000)) } + srand(0) + ws.each {|w| assert_equal(w.to_i, rand(-0x10000)) } + end + + def test_types + srand(0) + assert_equal(44, rand(100.0)) + assert_equal(1245085576965981900420779258691, rand((2**100).to_f)) + assert_equal(914679880601515615685077935113, rand(-(2**100).to_f)) + + srand(0) + assert_equal(997707939797331598305742933184, rand(2**100)) + assert_in_delta(0.602763376071644, rand((2**100).coerce(0).first), + 0.000000000000001) + + srand(0) + assert_in_delta(0.548813503927325, rand(nil), + 0.000000000000001) + srand(0) + o = Object.new + def o.to_i; 100; end + assert_equal(44, rand(o)) + assert_equal(47, rand(o)) + assert_equal(64, rand(o)) + end + + def test_srand + srand + assert_kind_of(Integer, rand(2)) + + srand(2**100) + %w(3258412053).each {|w| + assert_equal(w.to_i, rand(0x100000000)) + } + end + + def test_shuffle + srand(0) + assert_equal([1,4,2,5,3], [1,2,3,4,5].shuffle) + end +end |