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require "test/test_helper"
class ObjectMethodsTest < Test::Unit::TestCase
def setup
@klass = Class.new
end
def test_define_method_on_only_one_instance_of_a_class
instance = @klass.new
assert_raises(NoMethodError) { instance.success? }
instance.__metaclass__.class_eval { def success?; true; end }
assert_nothing_raised(NoMethodError) { assert instance.success? }
another_instance = @klass.new
assert_raises(NoMethodError) { another_instance.success? }
end
def test_metaclass_ancestors
instance = @klass.new
assert instance.__metaclass__.ancestors.include?(Object)
assert instance.__metaclass__.ancestors.include?(Kernel)
end
def test_metaclass_is_itself_a_class
instance = @klass.new
assert instance.__metaclass__.is_a?(Class)
end
end
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