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# frozen_string_literal: false
require 'test/unit'
require 'weakref'
class TestWeakRef < Test::Unit::TestCase
def make_weakref(level = 10)
if level > 0
make_weakref(level - 1)
else
WeakRef.new(Object.new)
end
end
def test_ref
obj = Object.new
weak = WeakRef.new(obj)
assert_equal(obj.to_s, weak.to_s)
assert_predicate(weak, :weakref_alive?)
end
def test_recycled
weaks = []
weak = nil
100.times do
weaks << make_weakref
ObjectSpace.garbage_collect
ObjectSpace.garbage_collect
break if weak = weaks.find {|w| !w.weakref_alive?}
end
assert_raise(WeakRef::RefError) {weak.to_s}
assert_not_predicate(weak, :weakref_alive?)
end
def test_not_reference_different_object
bug7304 = '[ruby-core:49044]'
weakrefs = []
3.times do
obj = Object.new
def obj.foo; end
weakrefs << WeakRef.new(obj)
ObjectSpace.garbage_collect
end
assert_nothing_raised(NoMethodError, bug7304) {
weakrefs.each do |weak|
begin
weak.foo
rescue WeakRef::RefError
end
end
}
end
def test_weakref_finalize
bug7304 = '[ruby-core:49044]'
assert_normal_exit %q{
require 'weakref'
obj = Object.new
3.times do
WeakRef.new(obj)
ObjectSpace.garbage_collect
end
}, bug7304
end
def test_repeated_object_memory_leak
bug10537 = '[ruby-core:66428]'
assert_no_memory_leak(%w(-rweakref), '', <<-'end;', bug10537, timeout: 60)
a = Object.new
150_000.times { WeakRef.new(a) }
end;
end
end
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