nobu	2015-07-04 20:54:04 +0900 (Sat, 04 Jul 2015)

  New Revision: 51142

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51142

  Log:
    all?, any?, one?, none? of empty Enumerable

  Modified files:
    trunk/test/ruby/test_enum.rb
Index: test/ruby/test_enum.rb
===================================================================
--- test/ruby/test_enum.rb	(revision 51141)
+++ test/ruby/test_enum.rb	(revision 51142)
@@ -238,6 +238,8 @@ class TestEnumerable < Test::Unit::TestC https://github.com/ruby/ruby/blob/trunk/test/ruby/test_enum.rb#L238
     assert_equal(false, @obj.all? {|x| x < 3 })
     assert_equal(true, @obj.all?)
     assert_equal(false, [true, true, false].all?)
+    assert_equal(true, [].all?)
+    assert_equal(true, @empty.all?)
   end
 
   def test_any
@@ -245,6 +247,8 @@ class TestEnumerable < Test::Unit::TestC https://github.com/ruby/ruby/blob/trunk/test/ruby/test_enum.rb#L247
     assert_equal(false, @obj.any? {|x| x > 3 })
     assert_equal(true, @obj.any?)
     assert_equal(false, [false, false, false].any?)
+    assert_equal(false, [].any?)
+    assert_equal(false, @empty.any?)
   end
 
   def test_one
@@ -256,6 +260,8 @@ class TestEnumerable < Test::Unit::TestC https://github.com/ruby/ruby/blob/trunk/test/ruby/test_enum.rb#L260
     assert(!(%w{ant bear cat}.one? {|word| word.length < 4}))
     assert(!([ nil, true, 99 ].one?))
     assert([ nil, true, false ].one?)
+    assert(![].one?)
+    assert(!@empty.one?)
   end
 
   def test_none
@@ -268,6 +274,7 @@ class TestEnumerable < Test::Unit::TestC https://github.com/ruby/ruby/blob/trunk/test/ruby/test_enum.rb#L274
     assert([nil].none?)
     assert([nil,false].none?)
     assert(![nil,false,true].none?)
+    assert(@empty.none?)
   end
 
   def test_min

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