spec.rb

describe "#current_agreement_vehicle assoc", :slow, travel_to: "2021-01-01" do
  let!(:vehicle1) do
    Timecop.freeze(1.day.ago) { create(:vehicle) }
  end

  let!(:vehicle2) do
    Timecop.freeze(2.days.ago) { create(:vehicle) }
  end

  let(:av1_2) do
    Timecop.freeze(18.seconds.ago) do
      create(:agreement_vehicle, owner: create(:admin), vehicle: vehicle1, state: Vehicle::STATE_ACTIVE_LOAN)
    end
  end

  let(:av2_2) do
    Timecop.freeze(10.seconds.ago) do
      create(:agreement_vehicle, owner: create(:admin), vehicle: vehicle2, state: Vehicle::STATE_REGISTERED)
    end
  end

  # This produces a 2x2 matrix of agreement_vehicle records
  # veh1 old = "registered"
  # veh1 new = "active"
  # veh2 old = "active"
  # veh2 new = "registered"
  #
  # So if we query for "latest" that are active only veh1 should get selected
  before do
    vehicle2.agreement_vehicles.update_all(state: Vehicle::STATE_ACTIVE_LOAN)
    av1_2
    av2_2
  end

  it "returns the correct association when used as a method, and correcly joins" do
    expect(vehicle1.reload.latest_agreement_vehicle).to eq(av1_2)
    expect(vehicle2.reload.latest_agreement_vehicle).to eq(av2_2)

    vehicles_with_currently_active_state = Vehicle.
      joins(:latest_agreement_vehicle).
      merge(AgreementVehicle.where(state: Vehicle::STATE_ACTIVE_LOAN))

    expect(vehicles_with_currently_active_state).to(
      contain(vehicle1).
      and exclude(vehicle2)
    )
  end
end