ruby - Rspec not working, or raise not raising? -

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i'm working on learning tdd while writing small ruby programs. have following class:

class mydirectory   def check(dir_name)     unless file.directory?(dir_name)       raise runtimeerror, "#{dir_name} not directory"     end   end end

and i'm trying test rspec test.

describe mydirectory   "should error if doesn't exist"     1 = mydirectory.new     one.check("donee").should raise_exception(runtimeerror, "donee not directory")   end end

it never works, , don't understand wrong rspec output. 

failures:    1) mydirectory should error if doesn't exist      failure/error: one.check("donee").should raise_error(runtimeerror, "donee not directory")      runtimeerror:        donee not directory      # ./lib/directory.rb:4:in `check'      # ./spec/directory_spec.rb:9:in `block (2 levels) in <top (required)>'

i'm hoping simple i'm missing, i'm not seeing it.

if checking exception, have separate test lambda or exception bubble up. 

 lambda {one.check("donee")}.should raise_error(runtimeerror, "donee not directory")

edit: since people still use answer, here in rspec 3:

 expect{one.check("donee")}.to raise_error(runtimeerror, "donee not directory")

the lambda no longer necessary because expect syntax takes optional block.


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