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| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | test/ruby/test_array.rb | 17 |
2 files changed, 22 insertions, 0 deletions
@@ -1,3 +1,8 @@ +Fri Oct 24 22:59:27 2008 Yusuke Endoh <mame@tsg.ne.jp> + + * test/ruby/test_array.rb (test_sample): add tests for size of + returned array and randomness. + Fri Oct 24 21:50:21 2008 Nobuyoshi Nakada <nobu@ruby-lang.org> * id.h, template/id.h.tmpl (enum ruby_method_ids): reordered. diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb index 1b917ca77a..cfb36045e3 100644 --- a/test/ruby/test_array.rb +++ b/test/ruby/test_array.rb @@ -1545,6 +1545,23 @@ class TestArray < Test::Unit::TestCase assert([0, 1, 2].include?(sample)) } end + + srand(0) + a = (1..18).to_a + (0..20).each do |n| + 10000.times do + b = a.sample(n) + assert_equal([n, 18].min, b.uniq.size) + assert_equal(a, (a | b).sort) + assert_equal(b.sort, (a & b).sort) + end + + h = Hash.new(0) + 10000.times do + a.sample(n).each {|x| h[x] += 1 } + end + assert_operator(h.values.min * 2, :>=, h.values.max) if n != 0 + end end def test_cycle |