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* array.c (rb_ary_rotate): new methods, Array#rotate! and

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Array#rotate.  [ruby-dev:17194]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26366 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2010-01-21 02:15:48 +00:00
parent 2cb9f63bab
commit 8a4c9b0b77
4 changed files with 163 additions and 8 deletions
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47
test/ruby/test_array.rb
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@ -1767,4 +1767,51 @@ class TestArray < Test::Unit::TestCase
a.sort_by! {|x| -x }
assert_equal([5,4,3,2,1], a)
end
def test_rotate
a = [1,2,3,4,5].freeze
assert_equal([2,3,4,5,1], a.rotate)
assert_equal([5,1,2,3,4], a.rotate(-1))
assert_equal([3,4,5,1,2], a.rotate(2))
assert_equal([4,5,1,2,3], a.rotate(-2))
assert_equal([4,5,1,2,3], a.rotate(13))
assert_equal([3,4,5,1,2], a.rotate(-13))
a = [1].freeze
assert_equal([1], a.rotate)
assert_equal([1], a.rotate(2))
assert_equal([1], a.rotate(-4))
assert_equal([1], a.rotate(13))
assert_equal([1], a.rotate(-13))
a = [].freeze
assert_equal([], a.rotate)
assert_equal([], a.rotate(2))
assert_equal([], a.rotate(-4))
assert_equal([], a.rotate(13))
assert_equal([], a.rotate(-13))
end
def test_rotate!
a = [1,2,3,4,5]
assert_equal([2,3,4,5,1], a.rotate!)
assert_equal([2,3,4,5,1], a)
assert_equal([4,5,1,2,3], a.rotate!(2))
assert_equal([5,1,2,3,4], a.rotate!(-4))
assert_equal([3,4,5,1,2], a.rotate!(13))
assert_equal([5,1,2,3,4], a.rotate!(-13))
a = [1]
assert_equal([1], a.rotate!)
assert_equal([1], a.rotate!(2))
assert_equal([1], a.rotate!(-4))
assert_equal([1], a.rotate!(13))
assert_equal([1], a.rotate!(-13))
a = []
assert_equal([], a.rotate!)
assert_equal([], a.rotate!(2))
assert_equal([], a.rotate!(-4))
assert_equal([], a.rotate!(13))
assert_equal([], a.rotate!(-13))
a = [].freeze
e = assert_raise(RuntimeError) {a.rotate!}
assert_match(/can't modify frozen array/, e.message)
end
end