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authormame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-03-25 15:56:36 +0000
committermame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-03-25 15:56:36 +0000
commit7e6dd6142e30e09976307e2626fd1ae9a36ab83e (patch)
tree4b08305d883b02298c1e1e55338022a9a43b4762
parent43a2aaea2f307ed50fa059affa797a01ba62320d (diff)
* test/ruby/test_rand.rb: add tests to achieve over 95% test coverage
of random.c. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15841 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r--ChangeLog5
-rw-r--r--test/ruby/test_rand.rb36
2 files changed, 41 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 143d624ba8..8eeeace69a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar 26 00:55:28 2008 Yusuke Endoh <mame@tsg.ne.jp>
+
+ * test/ruby/test_rand.rb: add tests to achieve over 95% test coverage
+ of random.c.
+
Wed Mar 26 00:28:55 2008 Yusuke Endoh <mame@tsg.ne.jp>
* test/ruby/test_rational.rb: add tests to achieve over 90% test
diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index e2fd127f9c..b7d841dbba 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -128,4 +128,40 @@ class TestRand < Test::Unit::TestCase
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