describe ".search" do
    before(:each) do
      @product1 = Product.create(name: "Acura", price: 100, category_id: 1)
      @product2 = Product.create(name: "BMV", price: 50, category_id: 2)
      @product3 = Product.create(name: "Ferrari", price: 150, category_id: 3)
    end
    context "when name 'Fiat'" do
      it "returns an empty array" do
        expect(Product.search('Fiat')).to be_empty
      end
    end

    context "when price '10'" do
      it "returns an empty array" do
        expect(Product.search(10)).to be_empty
      end
    end

    context "when name 'Acura'" do
      it "returns the product1" do
        expect(Product.search('Acura')).to match_array([@product1])
      end
    end

    context "when price '150'" do
      it "returns the product3" do
        expect(Product.search(150)).to match_array([@product3])
      end
    end
  end