asciinema.org/spec/support/sidekiq_matchers.rb

RSpec::Matchers.define :have_queued_job do |*expected|
  match do |actual|
    actual.jobs.any? { |job| Array(expected) == job["args"] }
  end
  failure_message do |actual|
    "expected that #{actual} would have a job queued with #{expected}"
  end
  failure_message_when_negated do |actual|
    "expected that #{actual} would not a have a job queued with #{expected}"
  end
  description do
    "have a job queued with #{expected}"
  end
end

RSpec::Matchers.define :have_queued_job_at do |at,*expected|
  match do |actual|
    actual.jobs.any? { |job| job["args"] == Array(expected) && job["at"].to_i == at.to_i }
  end
  failure_message do |actual|
    "expected that #{actual} would have a job queued with #{expected} at time #{at}"
  end
  failure_message_when_negated do |actual|
    "expected that #{actual} would not a have a job queued with #{expected} at time #{at}"
  end
  description do
    "have a job queued with #{expected} at time #{at}"
  end
end