Experiment using two different mocking frameworks

dual_spec.rb

require 'flexmock/dual'

RSpec.configure do |config|
  config.mock_with FlexMock.flexmock_and(:rspec)
end

describe "Dual Mocking" do
  before do
    @rm = mock("with rspec")
    @rm.should_receive(:foo)

    @fm = flexmock("with flexmock")
    @fm.should_receive(:bar).once
  end

  it "satisfies both" do
    @rm.foo
    @fm.bar
  end

  # The following three spec will fail, 
  # due to one or more of the mocking 
  # frameworks complaining about expectations.

  it "only rspec is happy" do
    @rm.foo
  end

  it "only flexmock is happy" do
    @fm.bar
  end

  it "neither are happy" do
  end

end

flexmock_dual.rb

require 'flexmock/rspec'

class FlexMock
  module Dual
    module DummyAdaptor
      def setup_mocks_for_rspec
      end
      def verify_mocks_for_rspec
      end
      def teardown_mocks_for_rspec
      end
    end

    module DualMocksAdaptor
      include DummyAdaptor
      include FlexMock::MockContainer

      def self.framework_name; :dual_mocks end

      include FlexMock::MockContainer
      def setup_mocks_for_rspec
        super
      end

      def verify_mocks_for_rspec
        flexmock_verify
        super
      end

      def teardown_mocks_for_rspec
        flexmock_close
        super
      end
    end

  end

  def self.flexmock_and(other)
    require "rspec/core/mocking/with_#{other}"
    FlexMock::Dual::DualMocksAdaptor.send(:include, RSpec::Core::MockFrameworkAdapter)
  end
end