Add model tests for user_rspec

spec/models/user_spec.rb

@@ -0,0 +1,43 @@
+require 'rails_helper'
+
+RSpec.describe User, type: :model do
+  describe 'validations' do
+    it { should validate_presence_of(:username) }
+    it { should validate_presence_of(:name) }
+    it { should validate_presence_of(:email) }
+    it { should validate_length_of(:password).is_at_least(8) }
+    it { should allow_value('username').for(:username) }
+    it { should_not allow_value('user name').for(:username) }
+    it { should_not allow_value('user@name').for(:username) }
+    it { should_not allow_value('user name!').for(:username) }
+  end
+
+  describe 'associations' do
+    it { should have_many(:reservations).dependent(:destroy) }
+  end
+
+  describe 'enums' do
+    it { should define_enum_for(:role).with_values(user: 0, admin: 1) }
+  end
+
+  describe 'after_initialize' do
+    it 'sets the default role to user' do
+      user = User.new
+      expect(user.role).to eq('user')
+    end
+  end
+
+  describe 'methods' do
+    describe '#admin?' do
+      it 'returns true if the user has admin role' do
+        admin_user = FactoryBot.create(:user, :admin)
+        expect(admin_user.admin?).to be_truthy
+      end
+
+      it 'returns false if the user does not have admin role' do
+        user = FactoryBot.create(:user)
+        expect(user.admin?).to be_falsey
+      end
+    end
+  end
+end