thr3ads.net - rspec users - [rspec-users] should raise_error(ArgumentError) resulting in NoMethodError [Aug 2010]

If this information is useful, please help other people find it:
Share via:

Brian Ploetz

2010-Aug-26 03:13 UTC

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://rubyforge.org/pipermail/rspec-users/attachments/20100825/4b96c5f4/attachment.html>

Brian Ploetz

2010-Aug-26 03:25 UTC

head link

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

FYI, the same thing happens with rspec 2.0.0.beta.20 as well:

  1) Service should raise an ArgumentError if currency_amount is nil
     Failure/Error: lambda
{ @service.currency_to_dollars(nil) }.should
raise_error(ArgumentError)
     expected ArgumentError, got #<NoMethodError: undefined method
`ArgumentError'' for #<Service:0x000001029665d8>>
     # ./test/spec/service_spec.rb:92:in `block (2 levels) in <top
(required)>''



On Aug 25, 11:13?pm, Brian Ploetz <bplo... at gmail.com>
wrote:> 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
>
> _______________________________________________
> rspec-users mailing list
> rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users

David Chelimsky

2010-Aug-26 04:14 UTC

head link

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

On Aug 25, 2010, at 10:13 PM, Brian Ploetz wrote:
> 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>>
This message is telling you there is no ArgumentError method, not that the
constant ArgumentError is missing. The method needs to be (adding
".new"):

    def currency_to_dollars(currency_amount)
      raise ArgumentError.new("Currency amount can''t be nil")
if currency_amount.nil?
    end
> 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
These pass because NoMethodError, which is what is being thrown, is a subclass
of StandardError and Exception.

HTH,
David

Rob Biedenharn

2010-Aug-26 04:35 UTC

head link

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

On Aug 26, 2010, at 12:14 AM, David Chelimsky wrote:> On Aug 25, 2010, at 10:13 PM, Brian Ploetz wrote:
>> 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>>
>
> This message is telling you there is no ArgumentError method, not  
> that the constant ArgumentError is missing. The method needs to be  
> (adding ".new"):
>
>    def currency_to_dollars(currency_amount)
>      raise ArgumentError.new("Currency amount can''t be
nil") if
> currency_amount.nil?
>    end
You might see this form, too.

    def currency_to_dollars(currency_amount)
      raise ArgumentError, "Currency amount can''t be nil" if
currency_amount.nil?
    end

Note the comma that separates the arguments to raise (Kernel#raise).

-Rob
>
>> 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
>
> These pass because NoMethodError, which is what is being thrown, is  
> a subclass of StandardError and Exception.
>
> HTH,
> David
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
Rob Biedenharn		
Rob at AgileConsultingLLC.com	http://AgileConsultingLLC.com/
rab at GaslightSoftware.com		http://GaslightSoftware.com/

Brian Ploetz

2010-Aug-26 13:19 UTC

head link

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

*smacks head* Duh.

Thanks David and Rob!


On Aug 26, 12:35?am, Rob Biedenharn <R... at AgileConsultingLLC.com>
wrote:> On Aug 26, 2010, at 12:14 AM, David Chelimsky wrote:
>
>
>
> > On Aug 25, 2010, at 10:13 PM, Brian Ploetz wrote:
> >> 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>>
>
> > This message is telling you there is no ArgumentError method, not ?
> > that the constant ArgumentError is missing. The method needs to be ?
> > (adding ".new"):
>
> > ? ?def currency_to_dollars(currency_amount)
> > ? ? ?raise ArgumentError.new("Currency amount can''t be
nil") if ?
> > currency_amount.nil?
> > ? ?end
>
> You might see this form, too.
>
> ? ? def currency_to_dollars(currency_amount)
> ? ? ? raise ArgumentError, "Currency amount can''t be
nil" if ?
> currency_amount.nil?
> ? ? end
>
> Note the comma that separates the arguments to raise (Kernel#raise).
>
> -Rob
>
>
>
>
>
> >> 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
>
> > These pass because NoMethodError, which is what is being thrown, is ?
> > a subclass of StandardError and Exception.
>
> > HTH,
> > David
> > _______________________________________________
> > rspec-users mailing list
> > rspec-us... at rubyforge.org
> >http://rubyforge.org/mailman/listinfo/rspec-users
>
> Rob Biedenharn ? ? ? ? ?
> R... at AgileConsultingLLC.com ?http://AgileConsultingLLC.com/
> r... at GaslightSoftware.com ? ? ? ? ? ?http://GaslightSoftware.com/
>
> _______________________________________________
> rspec-users mailing list
> rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users

rspec users - Aug 2010 - should raise_error(ArgumentError) resulting in NoMethodError

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError

[rspec-users] should raise_error(ArgumentError) resulting in NoMethodError