A small extension to RSpec that uses the Wrong gem

rspec_eventually.rb

# gem install wrong
require 'wrong'

class RSpec::Expectations::ExpectationTarget
  include Wrong::Assert
  include Wrong::Eventually
  
  def will(matcher)
    eventually { to(matcher) }
  end
  
  def will_not(matcher)
    eventually { not_to(matcher) }
  end
end

# usage - very helpful for things like automated UI tests
describe "Something that happens asynchronously" do
  it "will timeout if it doesn't match in time" do
    expect(future_value).will eql("expected result")
  end
end

I added this to a project as I got fed up wrapping my expect(foo).to calls in eventually blocks.

The only downside is the inability to specify a specific timeout, in which case you might want to still use eventually directly (or just set a sensible global default).