```ruby
RSpec.configure do |config|
  class ActiveRecord::Base
    mattr_accessor :shared_connection
    @@shared_connection = nil

    def self.connection
      @@shared_connection ||
        ConnectionPool::Wrapper.new(:size => 1) { retrieve_connection }
    end
  end

  ActiveRecord::Base.shared_connection = ActiveRecord::Base.connection

  config.filter_run :focus
  config.run_all_when_everything_filtered = true

  if config.files_to_run.one?
    config.default_formatter = 'doc'
  end

  # config.profile_examples = 10

  config.order = :random

  Kernel.srand config.seed

  config.expect_with :rspec do |expectations|
    expectations.syntax = :expect
  end

  config.mock_with :rspec do |mocks|
    mocks.syntax = :expect
    mocks.verify_partial_doubles = true
  end
end
```

Verify doubled constant names in specs
user
```ruby
RSpec.configure do |config|
  class ActiveRecord::Base
    mattr_accessor :shared_connection
    @@shared_connection = nil

    def self.connection
      @@shared_connection ||
        ConnectionPool::Wrapper.new(:size => 1) { retrieve_connection }
    end
  end

  ActiveRecord::Base.shared_connection = ActiveRecord::Base.connection

  config.filter_run :focus
  config.run_all_when_everything_filtered = true

  if config.files_to_run.one?
    config.default_formatter = 'doc'
  end

  # config.profile_examples = 10

  config.order = :random

  Kernel.srand config.seed

  config.expect_with :rspec do |expectations|
    expectations.syntax = :expect
  end

  config.mock_with :rspec do |mocks|
    mocks.syntax = :expect
    mocks.verify_partial_doubles = true
    mocks.verify_doubled_constant_names = true
  end
end
```
assistant