require "rails_helper"

RSpec.describe MaintenanceSchedule do
  it "has a valid factory" do
    expect(build(:maintenance_schedule)).to be_valid
  end

  it "requires all fields" do
    schedule = build(:maintenance_schedule, vehicle: nil, maintenance_type: nil, mileage_interval: nil, time_interval: nil)

    expect(schedule).not_to be_valid
    expect(schedule.errors.attribute_names).to include(:vehicle, :maintenance_type, :mileage_interval, :time_interval)
  end

  it "requires positive integer intervals" do
    schedule = build(:maintenance_schedule, mileage_interval: 0, time_interval: 0)

    expect(schedule).not_to be_valid
    expect(schedule.errors[:mileage_interval]).to be_present
    expect(schedule.errors[:time_interval]).to be_present
  end

  it "requires maintenance type to be unique per vehicle case-insensitively" do
    vehicle = create(:vehicle)
    create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")

    duplicate = build(:maintenance_schedule, vehicle: vehicle, maintenance_type: "oil change")
    other_vehicle_schedule = build(:maintenance_schedule, maintenance_type: "oil change")

    expect(duplicate).not_to be_valid
    expect(duplicate.errors[:maintenance_type]).to be_present
    expect(other_vehicle_schedule).to be_valid
  end
end