* array.c (rb_ary_repeated_combination): Support for repeated_combination.size

  [Feature #6636]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37504 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 1c04a05bb0..93d46a6c23 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -450,6 +450,11 @@ class TestEnumerator < Test::Unit::TestCase
     check_consistency_for_combinatorics(:repeated_permutation)
     assert_equal 291733167875766667063796853374976,
       (1..42).to_a.repeated_permutation(20).size # 42 ** 20
+
+    check_consistency_for_combinatorics(:repeated_combination)
+    assert_equal 28258808871162574166368460400,
+      (1..59).to_a.repeated_combination(42).size
+      # 1.upto(100).inject(:*) / 1.upto(42).inject(:*) / 1.upto(58).inject(:*)
   end
 end