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test/ruby/test_enumerator.rb: check the deprecation warning

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by explicitly setting `Warning[:deprecated] = true`.
I removed "capture_io" at 79063d8cbf, but
it printed the warning when `RUBYOPT=-w`.

This change makes the warnings enabled explicitly, capture and check the
warning.
This commit is contained in:
Yusuke Endoh 2020-09-25 23:45:42 +09:00
parent 0db5324e0d
commit abdd3c5616
1 changed files with 9 additions and 1 deletions
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10
test/ruby/test_enumerator.rb
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@ -69,7 +69,15 @@ class TestEnumerator < Test::Unit::TestCase
def test_initialize
assert_equal([1, 2, 3], @obj.to_enum(:foo, 1, 2, 3).to_a)
assert_equal([1, 2, 3], Enumerator.new(@obj, :foo, 1, 2, 3).to_a)
begin
deprecated_bak, Warning[:deprecated] = Warning[:deprecated], true
_, err = capture_io do
assert_equal([1, 2, 3], Enumerator.new(@obj, :foo, 1, 2, 3).to_a)
end
assert_match 'Enumerator.new without a block is deprecated', err
ensure
Warning[:deprecated] = deprecated_bak
end
assert_equal([1, 2, 3], Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.take(3))
assert_raise(ArgumentError) { Enumerator.new }