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Fix size on Enumerable#cycle when the size is 0 [Bug #14082].

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Patch by Kenichi Kamiya

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60666 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
marcandre 2017-11-05 22:14:25 +00:00
parent 3280f54168
commit dcb8a22f26
2 changed files with 8 additions and 0 deletions
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1
enum.c
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@ -2845,6 +2845,7 @@ enum_cycle_size(VALUE self, VALUE args, VALUE eobj)
VALUE size = enum_size(self, args, 0);
if (size == Qnil) return Qnil;
if (FIXNUM_ZERO_P(size)) return size;
if (args && (RARRAY_LEN(args) > 0)) {
n = RARRAY_AREF(args, 0);

7
test/ruby/test_enumerator.rb
View file

@ -576,13 +576,20 @@ class TestEnumerator < Test::Unit::TestCase
assert_equal Float::INFINITY, [:foo].cycle.size
assert_equal 10, [:foo, :bar].cycle(5).size
assert_equal 0, [:foo, :bar].cycle(-10).size
assert_equal Float::INFINITY, {foo: 1}.cycle.size
assert_equal 10, {foo: 1, bar: 2}.cycle(5).size
assert_equal 0, {foo: 1, bar: 2}.cycle(-10).size
assert_equal 0, [].cycle.size
assert_equal 0, [].cycle(5).size
assert_equal 0, {}.cycle.size
assert_equal 0, {}.cycle(5).size
assert_equal nil, @obj.cycle.size
assert_equal nil, @obj.cycle(5).size
assert_equal Float::INFINITY, @sized.cycle.size
assert_equal 126, @sized.cycle(3).size
assert_equal Float::INFINITY, [].to_enum { 42 }.cycle.size
assert_equal 0, [].to_enum { 0 }.cycle.size
end
def test_size_for_loops