RSpec for models

spec/factories/product_items.rb

+FactoryGirl.define do
+  factory :product_item do
+    
+  end
+end

spec/factories/users.rb

+FactoryGirl.define do
+  factory :user do
+    
+  end
+end

spec/models/category_spec.rb

@@ -3,8 +3,8 @@ require 'rails_helper'
 RSpec.describe Category, type: :model do
   describe 'db schema' do
     context 'columns' do
-      it { should have_db_column(:title).of_type(:string) }
-      it { should have_db_column(:description).of_type(:text) }
+      it { is_expected.to have_db_column(:title).of_type(:string) }
+      it { is_expected.to have_db_column(:description).of_type(:text) }
     end
   end
 end

spec/models/order_spec.rb

@@ -3,12 +3,12 @@ require 'rails_helper'
 RSpec.describe Order, type: :model do
   describe 'db schema' do
     context 'columns' do
-      it { should define_enum_for(:order_status).with(['Pending', 'Done']) }
+      it { is_expected.to define_enum_for(:order_status).with(['Pending', 'Done']) }
     end
   end
 
-  describe 'associations' do
-    it { should belong_to(:user) }
-    it { should have_many(:product_items) }
+  context 'associations' do
+    it { is_expected.to belong_to(:user) }
+    it { is_expected.to have_many(:product_items) }
   end
 end

spec/models/product_item_spec.rb

+require 'rails_helper'
+
+RSpec.describe ProductItem, type: :model do
+  describe 'db schema' do
+    context 'columns' do
+      it { is_expected.to have_db_column(:quantity).of_type(:integer) }
+    end
+  end
+
+  describe 'validations' do
+    it { is_expected.to validate_numericality_of(:quantity).is_greater_than(0) }
+  end
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:order) }
+    it { is_expected.to belong_to(:product) }
+  end
+end

spec/models/product_spec.rb

@@ -3,22 +3,22 @@ require 'rails_helper'
 RSpec.describe Product, type: :model do
   describe 'db schema' do
     context 'columns' do
-      it { should have_db_column(:title).of_type(:string) }
-      it { should have_db_column(:description).of_type(:text) }
-      it { should have_db_column(:sku).of_type(:string) }
-      it { should have_db_column(:quantity).of_type(:integer) }
-      it { should have_db_column(:price).of_type(:decimal) }
+      it { is_expected.to have_db_column(:title).of_type(:string) }
+      it { is_expected.to have_db_column(:description).of_type(:text) }
+      it { is_expected.to have_db_column(:sku).of_type(:string) }
+      it { is_expected.to have_db_column(:quantity).of_type(:integer) }
+      it { is_expected.to have_db_column(:price).of_type(:decimal) }
     end
   end
 
-  describe 'validations' do
-    it { should validate_presence_of(:title) }
-    it { should validate_presence_of (:price) }
-    it { should validate_numericality_of (:price) }
+  context 'validations' do
+    it { is_expected.to validate_presence_of(:title) }
+    it { is_expected.to validate_presence_of (:price) }
+    it { is_expected.to validate_numericality_of (:price) }
   end
 
-  describe 'associations' do
-    it { should belong_to(:user) }
-    it { should belong_to(:category) }
+  context 'associations' do
+    it { is_expected.to belong_to(:user) }
+    it { is_expected.to belong_to(:category) }
   end
 end

spec/models/user_spec.rb

+require 'rails_helper'
+
+RSpec.describe User, type: :model do
+  describe 'db schema' do
+    context 'columns' do
+      it { is_expected.to have_db_column(:first_name) }
+      it { is_expected.to have_db_column(:last_name) }
+      it { is_expected.to have_db_column(:email) }
+      it { is_expected.to have_db_column(:username) }
+    end
+  end
+
+  context 'validations' do
+    it { is_expected.to validate_presence_of(:email) }
+  end
+
+  context 'associations' do
+    it { is_expected.to have_many(:orders) }
+    it { is_expected.to have_many(:products) }
+  end
+end