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enumerator.c: fix for non-integral argument for ArithmeticSequence#last

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This fixes a bug of Enumerator::ArithmeticSequence#last in the case that
a non-integral argument is passed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64262 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
mrkn 2018-08-10 04:49:44 +00:00
parent 3ef25ed755
commit 33791cd092
2 changed files with 27 additions and 0 deletions
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3
enumerator.c
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@ -2495,6 +2495,9 @@ arith_seq_last(int argc, VALUE *argv, VALUE self)
}
rb_scan_args(argc, argv, "1", &nv);
if (!RB_INTEGER_TYPE_P(nv)) {
nv = rb_to_int(nv);
}
if (RTEST(rb_int_gt(nv, len))) {
nv = len;
}

24
test/ruby/test_arithmetic_sequence.rb
View file

@ -195,6 +195,30 @@ class TestArithmeticSequence < Test::Unit::TestCase
assert_equal([2.0, 0.0, -2.0], seq.last(3))
end
def test_last_with_float
res = (1..3).step(2).last(2.0)
assert_equal([1, 3], res)
assert_instance_of Integer, res[0]
assert_instance_of Integer, res[1]
res = (1..3).step(2).last(5.0)
assert_equal([1, 3], res)
assert_instance_of Integer, res[0]
assert_instance_of Integer, res[1]
end
def test_last_with_rational
res = (1..3).step(2).last(2r)
assert_equal([1, 3], res)
assert_instance_of Integer, res[0]
assert_instance_of Integer, res[1]
res = (1..3).step(2).last(10/2r)
assert_equal([1, 3], res)
assert_instance_of Integer, res[0]
assert_instance_of Integer, res[1]
end
def test_to_a
assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 1.step(10).to_a)
assert_equal([1, 3, 5, 7, 9], 1.step(10, 2).to_a)