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spec/requests/vehicles_spec.rb

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+require "rails_helper"
+
+RSpec.describe "Vehicles" do
+  describe "unauthenticated access" do
+    it "redirects vehicle pages to identification" do
+      get vehicles_path
+
+      expect(response).to redirect_to(identify_path)
+    end
+
+    it "does not create fuel entries" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      expect do
+        post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params }
+      end.not_to change(FuelEntry, :count)
+
+      expect(response).to redirect_to(identify_path)
+    end
+
+    it "does not create maintenance entries" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      expect do
+        post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params }
+      end.not_to change(MaintenanceEntry, :count)
+
+      expect(response).to redirect_to(identify_path)
+    end
+  end
+
+  describe "GET /" do
+    before { identify_user }
+
+    it "renders the active vehicle index" do
+      active_vehicle = create(:vehicle, make: "Ford", model: "F-150", active: true)
+      inactive_vehicle = create(:vehicle, make: "Chevrolet", model: "Silverado", active: false)
+
+      get root_path
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include("Vehicles")
+      expect(response.body).to include(active_vehicle.model)
+      expect(response.body).not_to include(inactive_vehicle.model)
+    end
+  end
+
+  describe "GET /vehicles" do
+    before { identify_user }
+
+    it "shows active vehicles by default" do
+      active_vehicle = create(:vehicle, make: "Ford", model: "F-150", active: true)
+      inactive_vehicle = create(:vehicle, make: "Chevrolet", model: "Silverado", active: false)
+
+      get vehicles_path
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include(active_vehicle.model)
+      expect(response.body).not_to include(inactive_vehicle.model)
+    end
+
+    it "shows inactive vehicles when requested" do
+      active_vehicle = create(:vehicle, make: "Ford", model: "F-150", active: true)
+      inactive_vehicle = create(:vehicle, make: "Chevrolet", model: "Silverado", active: false)
+
+      get vehicles_path(status: "inactive")
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).not_to include(active_vehicle.model)
+      expect(response.body).to include(inactive_vehicle.model)
+    end
+
+    it "shows all vehicles when requested" do
+      active_vehicle = create(:vehicle, make: "Ford", model: "F-150", active: true)
+      inactive_vehicle = create(:vehicle, make: "Chevrolet", model: "Silverado", active: false)
+
+      get vehicles_path(status: "all")
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include(active_vehicle.model)
+      expect(response.body).to include(inactive_vehicle.model)
+    end
+  end
+
+  describe "GET /vehicles/:id" do
+    before { identify_user }
+
+    it "shows vehicle details and display-only history sections" do
+      vehicle = create(:vehicle, make: "Ford", model: "F-150")
+      older_fuel_entry = create(:fuel_entry, vehicle: vehicle, odometer: 11_000, date: Date.current - 2.days)
+      newer_fuel_entry = create(:fuel_entry, vehicle: vehicle, odometer: 12_000, date: Date.current - 1.day)
+      older_maintenance_entry = create(
+        :maintenance_entry,
+        vehicle: vehicle,
+        name: "Oil Change",
+        notes: "Older oil change",
+        date: Date.current - 2.days
+      )
+      newer_maintenance_entry = create(
+        :maintenance_entry,
+        vehicle: vehicle,
+        name: "Oil Change",
+        notes: "Newer oil change",
+        date: Date.current - 1.day
+      )
+
+      get vehicle_path(vehicle)
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include(vehicle.make)
+      expect(response.body).to include(vehicle.model)
+      expect(response.body).to include("Maintenance Schedules")
+      expect(response.body).to include("Fuel History")
+      expect(response.body).to include("Maintenance History")
+      expect(response.body).to include(vehicle.maintenance_schedules.first.maintenance_type)
+      expect(response.body).to include("12,000")
+      expect(response.body).to include("11,000")
+      expect(response.body).to include(newer_maintenance_entry.notes)
+      expect(response.body).to include(older_maintenance_entry.notes)
+      expect(response.body.index("12,000")).to be < response.body.index("11,000")
+      expect(response.body.index(newer_maintenance_entry.notes)).to be < response.body.index(older_maintenance_entry.notes)
+    end
+  end
+
+  describe "POST /vehicles/:vehicle_id/fuel_entries" do
+    before { identify_user }
+
+    it "creates a fuel entry and records the identified user" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      expect do
+        post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params }
+      end.to change(FuelEntry, :count).by(1)
+
+      expect(response).to redirect_to(vehicle_path(vehicle))
+      expect(FuelEntry.last.updated_by_user).to eq(@identified_user)
+    end
+
+    it "updates the vehicle odometer when the fuel odometer is newer" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params.merge(odometer: 10_500) }
+
+      expect(vehicle.reload.current_odometer).to eq(10_500)
+    end
+
+    it "saves equal fuel odometer entries without changing the vehicle odometer" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      expect do
+        post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params.merge(odometer: 10_000) }
+      end.to change(FuelEntry, :count).by(1)
+
+      expect(vehicle.reload.current_odometer).to eq(10_000)
+    end
+
+    it "rejects fuel odometer entries below the current vehicle odometer" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      expect do
+        post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params.merge(odometer: 9_999) }
+      end.not_to change(FuelEntry, :count)
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(response.body).to include("prevented this fuel entry from being saved")
+      expect(vehicle.reload.current_odometer).to eq(10_000)
+    end
+
+    it "renders validation errors for invalid fuel params" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+
+      expect do
+        post vehicle_fuel_entries_path(vehicle), params: { fuel_entry: valid_fuel_entry_params.merge(gallons_pumped: 0) }
+      end.not_to change(FuelEntry, :count)
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(response.body).to include("prevented this fuel entry from being saved")
+    end
+  end
+
+  describe "POST /vehicles/:vehicle_id/maintenance_entries" do
+    before { identify_user }
+
+    it "creates a maintenance entry and records the identified user" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      expect do
+        post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params }
+      end.to change(MaintenanceEntry, :count).by(1)
+
+      expect(response).to redirect_to(vehicle_path(vehicle))
+      expect(MaintenanceEntry.last.updated_by_user).to eq(@identified_user)
+    end
+
+    it "updates the vehicle odometer when the maintenance odometer is newer" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params.merge(odometer: 10_500) }
+
+      expect(vehicle.reload.current_odometer).to eq(10_500)
+    end
+
+    it "saves older maintenance odometers without lowering the vehicle odometer" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      expect do
+        post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params.merge(odometer: 9_750) }
+      end.to change(MaintenanceEntry, :count).by(1)
+
+      expect(vehicle.reload.current_odometer).to eq(10_000)
+    end
+
+    it "warns and logs when maintenance odometer is more than 500 miles behind" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+      allow(Rails.logger).to receive(:warn)
+
+      post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params.merge(odometer: 9_499) }
+
+      expect(response).to redirect_to(vehicle_path(vehicle))
+      expect(flash[:warning]).to include("more than 500 miles behind")
+      expect(Rails.logger).to have_received(:warn).with(/vehicle_id=#{vehicle.id}.*entry_odometer=9499/)
+    end
+
+    it "rejects maintenance entries with an unmatched schedule name" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      expect do
+        post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params.merge(name: "Tire Rotation") }
+      end.not_to change(MaintenanceEntry, :count)
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(response.body).to include("prevented this maintenance entry from being saved")
+    end
+
+    it "renders validation errors for invalid maintenance params" do
+      vehicle = create(:vehicle, current_odometer: 10_000)
+      create(:maintenance_schedule, vehicle: vehicle, maintenance_type: "Oil Change")
+
+      expect do
+        post vehicle_maintenance_entries_path(vehicle), params: { maintenance_entry: valid_maintenance_entry_params.merge(notes: "") }
+      end.not_to change(MaintenanceEntry, :count)
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(response.body).to include("prevented this maintenance entry from being saved")
+    end
+  end
+
+  describe "GET /vehicles/new" do
+    before { identify_user }
+
+    it "renders the form" do
+      get new_vehicle_path
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include("New Vehicle")
+    end
+  end
+
+  describe "POST /vehicles" do
+    before { identify_user }
+
+    it "creates a vehicle with valid params" do
+      expect do
+        post vehicles_path, params: { vehicle: valid_vehicle_params }
+      end.to change(Vehicle, :count).by(1)
+
+      expect(response).to redirect_to(vehicle_path(Vehicle.last))
+      expect(Vehicle.last.vin).to eq("ABC123")
+    end
+
+    it "rejects invalid params" do
+      expect do
+        post vehicles_path, params: { vehicle: valid_vehicle_params.merge(make: "", vin: "") }
+      end.not_to change(Vehicle, :count)
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(response.body).to include("prevented this vehicle from being saved")
+    end
+  end
+
+  describe "GET /vehicles/:id/edit" do
+    before { identify_user }
+
+    it "renders the form" do
+      vehicle = create(:vehicle)
+
+      get edit_vehicle_path(vehicle)
+
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include("Edit Vehicle")
+    end
+  end
+
+  describe "PATCH /vehicles/:id" do
+    before { identify_user }
+
+    it "updates a vehicle with valid params" do
+      vehicle = create(:vehicle, make: "Ford")
+
+      patch vehicle_path(vehicle), params: { vehicle: valid_vehicle_params.merge(make: "Toyota") }
+
+      expect(response).to redirect_to(vehicle_path(vehicle))
+      expect(vehicle.reload.make).to eq("Toyota")
+    end
+
+    it "rejects invalid params" do
+      vehicle = create(:vehicle, make: "Ford")
+
+      patch vehicle_path(vehicle), params: { vehicle: valid_vehicle_params.merge(make: "") }
+
+      expect(response).to have_http_status(:unprocessable_content)
+      expect(vehicle.reload.make).to eq("Ford")
+      expect(response.body).to include("prevented this vehicle from being saved")
+    end
+  end
+
+  describe "DELETE /vehicles/:id" do
+    before { identify_user }
+
+    it "deactivates the vehicle instead of deleting it" do
+      vehicle = create(:vehicle, active: true)
+
+      expect do
+        delete vehicle_path(vehicle)
+      end.not_to change(Vehicle, :count)
+
+      expect(response).to redirect_to(vehicles_path)
+      expect(vehicle.reload).not_to be_active
+    end
+  end
+
+  def valid_vehicle_params
+    {
+      make: "Ford",
+      model: "F-150",
+      year: Date.current.year,
+      color: "White",
+      vin: "abc123",
+      licence_plate: "FLT1234",
+      current_odometer: 10_000,
+      fuel_tank_size: 26.0,
+      active: "1"
+    }
+  end
+
+  def valid_fuel_entry_params
+    {
+      odometer: 10_250,
+      gallons_pumped: 18.25,
+      price_paid: 47.62,
+      date: Date.current
+    }
+  end
+
+  def valid_maintenance_entry_params
+    {
+      name: "Oil Change",
+      notes: "Oil change performed by Fleet Service Center.",
+      odometer: 10_250,
+      cost: 89.95,
+      date: Date.current
+    }
+  end
+
+  def identify_user(user = create(:user))
+    @identified_user = user
+    access_key = AccessKey.current
+    post session_path, params: { name: user.name, email: user.email, key: access_key.raw_key }
+  end
+end