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Jberlinsky/gist:64e4cbeca33d65470120

Created December 21, 2014 04:56
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Null Object Pattern Example
Raw
gistfile1.rb
class NullNumber
def +(other)
raise ArgumentError
end
def to_i
raise ArgumentError
end
end
assert_nothing_raised do
1 + 1
end
assert_raise ArgumentError do
NullNumber.new + 1
end
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