Separate copy of DbContext class for unit testing?

Question

I have a CatalogDbContext class.

I want to use Bogus library to seed fake data into the database that my unit tests will use.

The example provided in bogus's github repo makes use of the HasData method of the CatalogDbContext class to seed data into the tables.

However, I will not want this HasData method to be executed from the API - meaning, the HasData method should only be run if the DBContext is created from the Unit Tests.

Kindly advise how to achieve this?.

using Bogus;
using Catalog.Api.Database.Entities;
using Microsoft.EntityFrameworkCore;

namespace Catalog.Api.Database
{
    public class CatalogDbContext : DbContext
    {
        public CatalogDbContext(DbContextOptions<CatalogDbContext> options) : base(options)
        {
        }
        public DbSet<CatalogItem> CatalogItems { get; set; }
        public DbSet<CatalogBrand> CatalogBrands { get; set; }
        public DbSet<CatalogType> CatalogTypes { get; set; }

        protected override void OnModelCreating(ModelBuilder builder)
        {
            builder.ApplyConfiguration(new CatalogBrandEntityTypeConfiguration());
            builder.ApplyConfiguration(new CatalogTypeEntityTypeConfiguration());
            builder.ApplyConfiguration(new CatalogItemEntityTypeConfiguration());

            FakeData.Init(10);

            builder.Entity<CatalogItem>().HasData(FakeData.CatalogItems);
        }
    }

    internal class FakeData
    {
        public static List<CatalogItem> CatalogItems = new List<CatalogItem>();

        public static void Init(int count)
        {
            var id = 1;

            var catalogItemFaker = new Faker<CatalogItem>()
                .RuleFor(ci => ci.Id, _ => id++)
                .RuleFor(ci => ci.Name, f => f.Commerce.ProductName());
        }

    }
}