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require 'test/unit'
class TestIvarTableIntegrity < Test::Unit::TestCase
def test_ivar_table_integrity
cls = Class.new do
def foo=(a); @foo = a; end
def remove_foo; remove_instance_variable :@foo; end
def foo; @foo; end
def bar=(a); @bar = a; end
def bar; @bar; end
end
obj = cls.new
obj.foo = 1
assert_equal 1, obj.foo
obj.remove_foo
obj.bar = 2
assert_equal nil, obj.foo
assert_equal 2, obj.bar
obj.foo = 3
assert_equal 3, obj.foo
assert_equal 2, obj.bar
end
end
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