Environment
------------------
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]
rspec (1.3.0)
Code
-------
def currency_to_dollars(currency_amount)
raise ArgumentError("Currency amount can't be nil") if
currency_amount.nil?
end
Spec
--------
it "should raise an ArgumentError if currency_amount is nil" do
lambda { @service.currency_to_dollars(nil) }.should
raise_error(ArgumentError)
end
Results in this failure:
1)
'Service should raise an ArgumentError if currency_amount is nil' FAILED
expected ArgumentError, got #<NoMethodError: undefined method
`ArgumentError' for #<Service:0x0000010087e5f0>>
test/spec/service_spec.rb:92:in `block (2 levels) in <top (required)>'
Changing the test to either of these two variants allows the the to pass:
lambda { @service.currency_to_dollars(nil) }.should
raise_error(StandardError)
lambda { @service.currency_to_dollars(nil) }.should raise_error
Why am I unable to test for a specific StandardError subclass?
Thanks in advance for any help.
BP
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