Sitecore unit test sample

SitecoreSampleUnitTest

using AutoFixture;
using AutoFixture.AutoNSubstitute;
using AutoFixture.Xunit2;

namespace Foundation.Tests.Extensions
{
    internal class AutoDbDataAttribute :AutoDataAttribute
    {
        public AutoDbDataAttribute()
            :base(() => new Fixture()
            .Customize(new DatabaseCustomization())
            .Customize(new ItemCustomization())
            .Customize(new AutoNSubstituteCustomization()))
        {

        }
    }
}


using AutoFixture;
using NSubstitute;
using Sitecore.Data;

namespace Foundation.Tests.Extensions
{
    internal class DatabaseCustomization : AutoFixture.ICustomization
    {
        public void Customize(IFixture fixture)
        {
            fixture.Customize<Database>(x => x.FromFactory(
                () => Substitute.For<Database>()).OmitAutoProperties());
        }
    }
    
}

using AutoFixture;
using AutoFixture.Kernel;
using NSubstitute;
using Sitecore.Data;
using Sitecore.Data.Items;

namespace Foundation.Tests.Extensions
{
    internal class ItemCustomization : ICustomization
    {
        public void Customize(IFixture fixture)
        {
            fixture.Customize<Item>(x => 
            x.FromFactory(() => CreateItem(fixture)).OmitAutoProperties());
        }

        private static Item CreateItem(ISpecimenBuilder fixture)
        {
            var item = Substitute.For<Item>(
                fixture.Create<ID>(),
                fixture.Create<ItemData>(),
                fixture.Create<Database>());

            return item;
        }
    }
}

using Sitecore.Data.Items;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Foundation.Helper.Common.GlassMapper.Controller
{
    public interface IGlassStandardController
    {
        T GetRenderingParameters<T>() where T : class;
        T GetContextItem<T>(bool isLazy = false, bool inferType = false) where T : class;
        T GetDataSourceItem<T>(bool isLazy = false, bool inferType = false) where T : class;
        Item DataSourceItem { get; }
    }
}


Test class

using Feature.LocalFeature.Controllers;
using Foundation.Helper.Common.GlassMapper.Controller;
using NSubstitute;
using Sitecore.Data;
using Sitecore.Data.Items;
using Sitecore.Mvc.Common;
using Sitecore.Mvc.Presentation;
using System.Web.Mvc;
using Feature.LocalFeature.Tests.Extensions;
using Xunit;
using Feature.LocalFeature.Models.Interface;

namespace Feature.LocalFeature.Tests
{
    public class LocalFeatureControllerTests
    {
        
        [Theory, AutoDbData]
        public void LocalFeatureController_LocalFeatureCard(Database db, Item item, IGlassStandardController glassStandardController)
        {
          //Arrange
            var controller = new LocalFeatureController(glassStandardController);
            //item["Title"].Returns("Welcome!");
            db.GetItem("/sitecore/content/home").Returns(item);

            var context = new RenderingContext();
            context.Rendering = new Rendering();
            context.Rendering.Item = item;
            context.Rendering.Parameters = new RenderingParameters("cssClass=orange&position=left");
            ContextService.Get().Push(context);
            //Act
            var res = controller.LocalFeatureCard();
            //Assert.Equal("Welcome!", item["Title"]);
            //Assert
            Assert.IsType<ViewResult>(res);
        }

        [Theory, AutoDbData]
        public void Index_ReturnsCorrectViewName(IGlassStandardController glassStandardController)
        {
            //Arrange
            var controller = new LocalFeatureController(glassStandardController);
            //Act
            var result = controller.Index() as ViewResult;
            // Assert
            Assert.Equal(string.Empty, result?.ViewName);
        }

        [Theory, AutoDbData]// High Priority
        public void LocalFeatureController_LocalFeatureCard_When_Param_Not_Null(Database db, Item item, IGlassStandardController glassStandardController)
        {
            //Assert.NotNull(database);
            var controller = new LocalFeatureController(glassStandardController);
            //item["Title"].Returns("Welcome!");
            db.GetItem("/sitecore/content/home").Returns(item);

            var context = new RenderingContext();
            context.Rendering = new Rendering();
            context.Rendering.Item = item;
            context.Rendering.Parameters = new RenderingParameters("cssClass=orange&position=left");
            ContextService.Get().Push(context);
            //Act
            var result = controller.LocalFeatureCard();
            
           //Assert
           var viewResult = result as ViewResult; 
            Assert.IsType<LocalFeature.Models.LocalFeature>(viewResult.Model);

        }

        [Theory, AutoDbData]// High Priority
        public void LocalFeatureController_LocalFeatureCard_When_Param_null(Database db, Item item, IGlassStandardController glassStandardController)
        {
            //Arrange
            db.GetItem("/sitecore/content/home").Returns(item);

            var context = new RenderingContext();
            context.Rendering = new Rendering();
            context.Rendering.Item = item;
            context.Rendering.Parameters = new RenderingParameters("cssClass=orange&position=left");
            ContextService.Get().Push(context);
           
            glassStandardController.GetRenderingParameters<ILocalFeatureParameter>().Returns((ILocalFeatureParameter)null);
            glassStandardController.GetDataSourceItem<ILocalFeature>().Returns((ILocalFeature)null);
            var controller = new LocalFeatureController(glassStandardController);
           
            //Act
            var result = controller.LocalFeatureCard();
          
            var viewResult = result as ViewResult;
            LocalFeature.Models.LocalFeature ac = (LocalFeature.Models.LocalFeature)viewResult.Model;
            //Assert
            Assert.Null(ac.LocalFeatureDetail);
            Assert.Null(ac.Parameter);
        }
    }
}