Must "explanation" {.test.} style not working in my unit tests

luislavena · April 29, 2011, 9:19pm

Hi, I’m trying to write BDD-style Test::Unit tests like so:

class StackTest < Test::Unit::TestCase
must “return top element” do
#…
end

as opposed to the more usual

class StackTest < Test::Unit::TestCase
def test_return_top_element
#…
end

The trick is explained here:

and the source of the extension is here:

github.com

practicingruby/rbp/blob/master/testing/test_unit_extensions.rb

module Test::Unit
  # Used to fix a minor minitest/unit incompatibility in flexmock 
  AssertionFailedError = Class.new(StandardError)
  
  class TestCase
   
    def self.must(name, &block)
      test_name = "test_#{name.gsub(/\s+/,'_')}".to_sym
      defined = instance_method(test_name) rescue false
      raise "#{test_name} is already defined in #{self}" if defined
      if block_given?
        define_method(test_name, &block)
      else
        define_method(test_name) do
          flunk "No implementation provided for #{name}"
        end
      end
    end

  end

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When I run the code I get this:

undefined method `must’ for StackTest:Class (NoMethodError)

Does anyone know why this alternative syntax does not work? In Gregory
Brown’s book it is described as something one can use out of the box,
without installing anything extra. Or is the Ruby version the problem
(I’m using v. 1.9.2p0)?

Thanks!

vahagn · April 30, 2011, 3:10pm

Ping…

vahagn · April 30, 2011, 4:57pm

On Sat, Apr 30, 2011 at 10:11:04PM +0900, Vahagn H. wrote:

Ping…

I, for one, see your messages to the list – but I do not use that
syntax
for my unit tests, so I’m afraid I have nothing to offer. Hopefully
someone else will be able to help.

vahagn · April 30, 2011, 5:23pm

On Fri, Apr 29, 2011 at 3:19 PM, Vahagn H.
[email protected]wrote:

Hi, I’m trying to use this extension:

rbp/testing/test_unit_extensions.rb at master · practicingruby/rbp · GitHub

are you including that code at the top of your test file? or at least
having
a “test_helper.rb” file you require into your tests?? i’ve used this
syntax
before but not extensively, so i dont know how much help i will be.
hex

vahagn · May 2, 2011, 10:34am

@Chad: cheers!

@serialhex:

or at least having a “test_helper.rb” file you require into your tests??

I wasn’t doing that since I had the impression (from reading about this
syntax) that this method was integrated into Test::Unit, so one could
just use it “out of the box”. Apparently I was wrong - I’ve pasted it
into a helper file and required it and now it’s working.

Thanks! V.