You can always muck about in the class’ internals:
if $0 == FILE
require ‘test/unit’class MyObject_Test
def test_functionality_1
MyObject.instance_eval { @__instance__ = new }
o = MyObject.instance # ... Tests on o, which changes the internal state of o ... end def test_functionality_2
MyObject.instance_eval { @__instance__ = new }
···
o = MyObject.instance # This instance is polluted # by previous tests # ... Tests on o end
end
end