Show warnings for examples that has no expectations

spec_helper.rb

RSpec.configure do |config|
  config.after(:each) do
    result = self.example.metadata[:execution_result]
    has_mock_expectations = RSpec::Mocks.space.instance_eval{receivers}.empty?
    if !result[:exception] && !result[:pending_message] && !RSpec::Matchers.last_should && hasnt_mock_expectations
      $stderr.puts "[WARN] No expectations found in example at #{self.example.location}: Maybe you forgot to write `should` in the example?"
    end
  end
end

Thanks for this, it's just what I was looking for.

Should the variable on line 4 be hasnt_mock_expectations though, since that's what you reference on line 5?