Add ability to call custom methods defined inside the context

[celesteking]

There should be written with big red letters 30pt min size in your shoulda-context doc/guide that user should not have more than 3 level deep context, otherwise he would want to use this feature for the sake of hierarchy and encapsulation.

#!/bin/env ruby

require 'rubygems'
require 'test/unit'
require 'shoulda'

class ShouldaTest < Test::Unit::TestCase
    context 'cecocec' do
        def self.customethod
            puts "cucuocu!"
        end

        def customethod
            puts "cacacaca!"
        end

        should 'test #1' do
            puts 'test #1'
            customethod
        end
    end
end

LC_ALL=C ruby ./test/unit/shoulda_test2.rb 
Loaded suite ./test/unit/shoulda_test2
Started
test #1
E
Finished in 0.000197 seconds.

  1) Error:
test: cecocec should test #1. (ShouldaTest):
NameError: undefined local variable or method `customethod' for #<ShouldaTest:0x7fb78d214368>
    ./test/unit/shoulda_test2.rb:19:in `__bind_1338242319_881688'
    X/gems/shoulda-context-1.0.0/lib/shoulda/context/context.rb:398:in `call'
    X/gems/shoulda-context-1.0.0/lib/shoulda/context/context.rb:398:in `test: cecocec should test #1. '

1 tests, 0 assertions, 0 failures, 1 errors

[travisjeffery]

Feel free to submit a patch otherwise I'm good with people putting their test helper methods as privates at the bottom of the file, or refactoring into factories/common helpers in a place like a test_helper.rb.