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require 'test/unit'
require 'weakref'
class TestWeakRef < Test::Unit::TestCase
def make_weakref(level = 10)
obj = Object.new
str = obj.to_s
level.times {obj = WeakRef.new(obj)}
return WeakRef.new(obj), str
end
def test_ref
weak, str = make_weakref
assert_equal(str, weak.to_s)
end
def test_recycled
weak, str = make_weakref
assert_nothing_raised(WeakRef::RefError) {weak.to_s}
ObjectSpace.garbage_collect
ObjectSpace.garbage_collect
assert_raise(WeakRef::RefError) {weak.to_s}
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
end
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