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authormame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-07-30 12:57:02 +0000
committermame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-07-30 12:57:02 +0000
commit045136d47599596c78e72ecb8de688671dfae669 (patch)
tree04470a33111d0ccf5051c4bb0a63d66c3688743b
parentfe22f83ecf03f969860ce8cddc53d9917e32cbc2 (diff)
* test/ruby/test_rand.rb: add tests for Random class.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24326 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r--ChangeLog4
-rw-r--r--test/ruby/test_rand.rb190
2 files changed, 194 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 02acc2ebbaa..66773ac554e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jul 30 21:56:18 2009 Yusuke Endoh <mame@tsg.ne.jp>
+
+ * test/ruby/test_rand.rb: add tests for Random class.
+
Thu Jul 30 21:48:56 2009 Yusuke Endoh <mame@tsg.ne.jp>
* random.c (init_genrand): ensure invariant of mt->next and mt->left.
diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index f32696cf10f..2f2e772c1b0 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -168,4 +168,194 @@ class TestRand < Test::Unit::TestCase
def test_big_seed
assert_random_int(%w(1143843490), 0x100000000, 2**1000000-1)
end
+
+ def test_random_gc
+ r = Random.new(0)
+ %w(2357136044 2546248239 3071714933).each do |w|
+ assert_equal(w.to_i, r.int(0x100000000))
+ end
+ GC.start
+ %w(3626093760 2588848963 3684848379).each do |w|
+ assert_equal(w.to_i, r.int(0x100000000))
+ end
+ end
+
+ def test_random_type_error
+ assert_raise(TypeError) { Random.new(Object.new) }
+ assert_raise(TypeError) { Random.new(0).int(Object.new) }
+ end
+
+ def test_random_argument_error
+ assert_raise(ArgumentError) { Random.new(0).float(0, 0) }
+ end
+
+ def test_random_seed
+ assert_equal(0, Random.new(0).seed)
+ assert_equal(0x100000000, Random.new(0x100000000).seed)
+ assert_equal(2**100, Random.new(2**100).seed)
+ end
+
+ def test_random_dup
+ r1 = Random.new(0)
+ r2 = r1.dup
+ %w(2357136044 2546248239 3071714933).each do |w|
+ assert_equal(w.to_i, r1.int(0x100000000))
+ end
+ %w(2357136044 2546248239 3071714933).each do |w|
+ assert_equal(w.to_i, r2.int(0x100000000))
+ end
+ r2 = r1.dup
+ %w(3626093760 2588848963 3684848379).each do |w|
+ assert_equal(w.to_i, r1.int(0x100000000))
+ end
+ %w(3626093760 2588848963 3684848379).each do |w|
+ assert_equal(w.to_i, r2.int(0x100000000))
+ end
+ end
+
+ def test_random_state
+ state = <<END
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+2254080
+END
+ state = state.split.join.to_i
+ r = Random.new(0)
+ srand(0)
+ assert_equal(state, r.instance_eval { state })
+ assert_equal(state, Random.instance_eval { state })
+ r.int(0x100)
+ assert_equal(state, r.instance_eval { state })
+ end
+
+ def test_random_left
+ r = Random.new(0)
+ assert_equal(1, r.instance_eval { left })
+ r.int(0x100)
+ assert_equal(624, r.instance_eval { left })
+ r.int(0x100)
+ assert_equal(623, r.instance_eval { left })
+ srand(0)
+ assert_equal(1, Random.instance_eval { left })
+ rand(0x100)
+ assert_equal(624, Random.instance_eval { left })
+ rand(0x100)
+ assert_equal(623, Random.instance_eval { left })
+ end
+
+ def test_random_bytes
+ r = Random.new(0)
+ assert_equal("", r.bytes(0))
+ assert_equal("\xAC".force_encoding("ASCII-8BIT"), r.bytes(1))
+ assert_equal("/\xAA\xC4\x97u\xA6\x16\xB7\xC0\xCC".force_encoding("ASCII-8BIT"), r.bytes(10))
+ end
+
+ def test_random_range
+ r = Random.new(0)
+ %w(9 5 8).each {|w| assert_equal(w.to_i, r.int(5..9)) }
+ %w(-237 731 383).each {|w| assert_equal(w.to_i, r.int(-1000..1000)) }
+ %w(1267650600228229401496703205382
+ 1267650600228229401496703205384
+ 1267650600228229401496703205383).each do |w|
+ assert_equal(w.to_i, r.int(2**100+5..2**100+9))
+ end
+ end
+
+ def test_random_float
+ r = Random.new(0)
+ assert_in_delta(0.5488135039273248, r.float, 0.0001)
+ assert_in_delta(0.7151893663724195, r.float, 0.0001)
+ assert_in_delta(0.6027633760716439, r.float, 0.0001)
+ assert_in_delta(1.0897663659937937, r.float(2), 0.0001)
+ assert_in_delta(5.3704626067153264e+29, r.float(2**100), 10**25)
+
+ # is this intentional?
+ assert_raise(TypeError) { r.float(1..2) }
+ end
+
+ def test_random_equal
+ r = Random.new(0)
+ assert(r == r)
+ assert(r == r.dup)
+ r1 = r.dup
+ r2 = r.dup
+ r1.int(0x100)
+ assert(r1 != r2)
+ r2.int(0x100)
+ assert(r1 == r2)
+ end
end