script that calls the tests:
-----------------------------
require 'rspec'

...
                RSpec.shared_context "shared env attributes", :a => :b do
                    let(:shared_attr) { {'environment' => env_attr} }
                end
                result = RSpec::Core::Runner.run(existing_test_files)
...

existing_test_files is an array of 2 files:


testfile1:
------------------------------------------------------
require 'serverspec'
include Serverspec::Helper::Exec
include Serverspec::Helper::DetectOS

RSpec.configure do |config|
    config.color = true
    config.formatter = :documentation
end

describe 'recipe app::upgrade tests' do

    context file('/user/app') do
        it { should be_directory }
        it { should be_mode 755 }
        it { should be_owned_by 'user-app' }
    end
end

testfile2:
------------------------------------------------------
contains the same like testfile1


stdout -> testresults
----------------
recipe app::upgrade tests

recipe app::upgrade tests
  File "/user/app"
  File "/user/app"
    should be directory
    should be directory
    should be mode 755
    should be mode 755
    should be owned by "user-app"
    should be owned by "user-app"
...
problem: the test are called n times. In this case 2 times. If I add a third testfile each test of each file is called 3 times.
Hint: Before this problem I had to move RSpec.configure from the calling script to the testfiles, to see the testresults