How to combine Bogus and rspec-mocks (or other mocking library) in one project

foo_spec.rb

require 'spec_helper'

class Foo
  def initialize(bar)
    @bar = bar
  end

  def foo
    @bar.bar
  end
end

class Bar
  def bar
  end
end

describe "tests that use rspec-expectations" do
  describe "using new syntax" do
    it "should allow mocking" do
      bar = mock()
      foo = Foo.new(bar)
      bar.should_receive(:bar).and_return(123)

      foo.foo.should == 123
    end

    it "should allow spying" do
      bar = stub(bar: 123)
      foo = Foo.new(bar)

      foo.foo

      bar.should have_received(:bar)
    end

    it "should fail because of an unsatisfied expectation" do
      bar = mock()
      bar.should_receive(:bar).and_return(123)
    end
  end

  describe "using old syntax" do
    it "should allow mocking" do
      bar = double()
      foo = Foo.new(bar)
      expect(bar).to receive(:bar).and_return(123)

      expect(foo.foo).to eq(123)
    end

    it "should allow spying" do
      bar = double(bar: 123)
      foo = Foo.new(bar)

      foo.foo

      expect(bar).to have_received(:bar)
    end

    it "should fail because of an unsatisfied expectation" do
      bar = double()
      expect(bar).to receive(:bar).and_return(123)
    end
  end
end

describe "tests that use bogus", :bogus do
  fake(:bar)

  it "allows spying using bogus syntax" do
    foo = Foo.new(bar)

    foo.foo

    expect(bar).to have_received.bar
  end

  it "allows stubbing" do
    foo = Foo.new(bar)
    stub(bar).bar { 123 }

    expect(foo.foo).to eq(123)
  end

  it "fails because of unsatisfied expectations" do
    mock(bar).bar { 123 }
  end
end

spec_helper.rb

require 'bogus'

RSpec.configure do |config|
  # this is only so that we can write:
  #     describe Foo, :bogus do
  # instead of
  #     describe Foo, bogus: true do
  config.treat_symbols_as_metadata_keys_with_true_values = true

  config.mock_with :rspec

  # unfortunately it's not enough to write:
  # config.include Bogus::MockingDSL, :bogus
  # because the methods from Rspec::Mocks::ExampleMethods will have
  # preference then
  config.before(:each, :bogus) do
    extend Bogus::MockingDSL
  end

  config.after(:each, :bogus) do
    Bogus.after_each_test
  end

  config.after(:suite) do
    Bogus.reset!
  end

  config.extend Bogus::RSpecExtensions, :bogus

  # just use the version that matches your RSpec
  if RSpec::Core::Version::STRING >= "2.14"
    config.backtrace_exclusion_patterns << Regexp.new("lib/bogus")
  else
    config.backtrace_clean_patterns << Regexp.new("lib/bogus")
  end
end