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* enumerator.c (enumerator_peek): new method Enumerator#peek.

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(enumerator_next): don't rewind at end.
  [ruby-dev:38932]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2009-08-18 12:02:53 +00:00
parent ec490ab2c4
commit 2772c80ce0
3 changed files with 74 additions and 3 deletions
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22
test/ruby/test_enumerator.rb
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@ -130,5 +130,27 @@ class TestEnumerator < Test::Unit::TestCase
assert_equal(3, e.next)
assert_raise(StopIteration) { e.next }
end
def test_peek
a = [1]
e = a.each
assert_equal(1, e.peek)
assert_equal(1, e.peek)
assert_equal(1, e.next)
assert_raise(StopIteration) { e.peek }
assert_raise(StopIteration) { e.peek }
end
def test_next_after_stopiteration
a = [1]
e = a.each
assert_equal(1, e.next)
assert_raise(StopIteration) { e.next }
assert_raise(StopIteration) { e.next }
e.rewind
assert_equal(1, e.next)
assert_raise(StopIteration) { e.next }
assert_raise(StopIteration) { e.next }
end
end