console output

ruby-1.8.6-p399 ➜ rvm use 1.8.6

info: Using ruby 1.8.6 p399
ruby-1.8.6-p399 ➜ ruby rspec_constant_spec.rb
.

Finished in 0.00083 seconds
1 example, 0 failures
ruby-1.8.6-p399 ➜ rvm use 1.8.7

info: Using ruby 1.8.7 p302
ruby-1.8.7-p302 ➜ ruby rspec_constant_spec.rb
.

Finished in 0.00085 seconds
1 example, 0 failures

ruby-1.8.7-p302 ➜ rvm use 1.9.1

info: Using ruby 1.9.1 p378
ruby-1.9.1-p378 ➜ ruby rspec_constant_spec.rb
F

Failures:
  1) MyClass returns the expected value from #foo
     Failure/Error: subject.foo.should == EXPECTED_VALUE
     uninitialized constant RSpec::Core::ExampleGroup::Nested_1::EXPECTED_VALUE
     # rspec_constant_spec.rb:9:in `block in define_spec'

Finished in 0.00238 seconds
1 example, 1 failure
ruby-1.9.1-p378 ➜ rvm use 1.9.2

info: Using ruby 1.9.2 p0
ruby-1.9.2-p0 ➜ ruby rspec_constant_spec.rb
.

Finished in 0.00183 seconds
1 example, 0 failures

rspec_constant_spec.rb

require 'rubygems'
require 'rspec'

module MySpecs
  EXPECTED_VALUE = 7

  def define_spec
    it "returns the expected value from #foo" do
      subject.foo.should == EXPECTED_VALUE
    end
  end
end

class MyClass
  def foo; 7; end
end

describe MyClass do
  extend MySpecs
  define_spec
end