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* test/ruby/test_rand.rb: add tests to achieve over 95% test coverage

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of random.c.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15841 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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mame 2008-03-25 15:56:36 +00:00
parent 43a2aaea2f
commit 7e6dd6142e
2 changed files with 41 additions and 0 deletions
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ChangeLog
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@ -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

36
test/ruby/test_rand.rb
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@ -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