ActiveSupport::EnvironmentInquirer example

sidekiq_policy.rb

class SidekiqPolicy
  attr_reader :user, :environment

  def initialize(user, environment: Rails.env)
    @user = user
    @environment = environment
  end

  def visible?
    user.admin? || environment.development?
  end
end

sidekiq_policy_test.rb

require "test_helper"

class SidekiqPolicyTest < ActiveSupport::TestCase
  test "only admins can see the route" do
    assert SidekiqPolicy.new(users(:admin)).visible?
    refute SidekiqPolicy.new(users(:empty)).visible?
  end

  test "everyone can see the route in development" do
    environment = ActiveSupport::EnvironmentInquirer.new("development")
    assert SidekiqPolicy.new(users(:admin), environment: environment).visible?
    assert SidekiqPolicy.new(users(:empty), environment: environment).visible?
  end
end

TIL about ActiveSupport::EnvironmentInquirer, which is great for injecting an environment-dependent conditional for tests.