fix specs, use relation hooks

spec/active_record/aux_table_spec.rb

@@ -293,15 +293,14 @@ RSpec.describe HasAuxTable do
         expect(car_names).to eq(["Tesla Model 3", "Toyota Prius"])
       end
 
-      it "doesn't add joins for queries without auxiliary columns",
-         skip: true do
+      it "doesn't add joins for queries without auxiliary columns" do
         toyota_cars = Car.where(name: "Toyota Prius")
         expect(toyota_cars.length).to eq(1)
         expect(toyota_cars.first.name).to eq("Toyota Prius")
         expect(toyota_cars.first.fuel_type).to eq("hybrid")
       end
 
-      it "works with chained where clauses", skip: true do
+      it "works with chained where clauses" do
         # Chain where clauses with auxiliary columns
 
         efficient_cars = Car.where(fuel_type: "hybrid").where(engine_size: 1.8)
@@ -529,7 +528,7 @@ RSpec.describe HasAuxTable do
         )
       end
 
-      it "works with empty where conditions", skip: true do
+      it "works with empty where conditions" do
         # Empty where should not cause issues
         cars = Car.where({})
         expect(cars.length).to eq(3)
@@ -629,7 +628,7 @@ RSpec.describe HasAuxTable do
     end
 
     describe "nested associations" do
-      it "can create a driver through the association", skip: true do
+      it "can create a driver through the association" do
         driver = @car.drivers.create!(name: "John Doe")
         expect(driver.car).to eq(@car)
         expect(driver.car_id).to eq(@car.id)
@@ -637,7 +636,7 @@ RSpec.describe HasAuxTable do
         expect(driver.car.engine_size).to eq(1.5)
       end
 
-      it "can create a driver directly", skip: true do
+      it "can create a driver directly" do
         driver = Driver.create!(car: @car, name: "John Doe")
         expect(driver.car).to eq(@car)
         expect(driver.car_id).to eq(@car.id)
@@ -645,13 +644,13 @@ RSpec.describe HasAuxTable do
         expect(driver.car.engine_size).to eq(1.5)
       end
 
-      it "can be accessed through the association", skip: true do
+      it "can be accessed through the association" do
         driver = @car.drivers.create!(name: "John Doe")
         expect(@car.drivers).to eq([driver])
       end
 
-      it "can be destroyed through the association", skip: true do
-        driver = @car.drivers.build(name: "John Doe")
+      it "can be destroyed through the association" do
+        driver = @car.drivers.create!(name: "John Doe")
         expect { driver.destroy }.to change { @car.drivers.count }.by(-1)
       end
     end