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Kernel#open may be redefined

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This commit is contained in:
Nobuyoshi Nakada 2019-09-27 01:13:10 +09:00
parent 617fa3049a
commit 81191afe8a
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1 changed files with 13 additions and 2 deletions
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15
test/ruby/test_io.rb
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@ -2283,13 +2283,24 @@ class TestIO < Test::Unit::TestCase
o = Object.new
def o.to_open(**kw); kw; end
assert_equal({:a=>1}, open(o, a: 1))
assert_warn(/The last argument is used as the keyword parameter.*for `to_open'/m) do
w = /The last argument is used as the keyword parameter.*for `(to_)?open'/m
redefined = nil
w.singleton_class.define_method(:===) do |s|
match = super(s)
redefined = !$1
match
end
assert_warn(w) do
assert_equal({:a=>1}, open(o, {a: 1}))
end
def o.to_open(kw); kw; end
assert_equal({:a=>1}, open(o, a: 1))
assert_equal({:a=>1}, open(o, {a: 1}))
unless redefined
assert_equal({:a=>1}, open(o, {a: 1}))
end
end
def test_open_pipe