nice refactorings

PracticeCalendar.UnitTests/Integration/CustomWebApplicationFactory.cs

@@ -0,0 +1,33 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using PracticeCalendar.Infrastructure.Persistence;
+
+namespace PracticeCalendar.UnitTests.Integration
+{
+    public class CustomWebApplicationFactory : WebApplicationFactory<Program>
+    {
+        protected override void ConfigureWebHost(IWebHostBuilder builder)
+        {
+            builder.ConfigureAppConfiguration(configurationBuilder =>
+            {
+                var integrationConfig = new ConfigurationBuilder()
+                    .AddJsonFile("appsettings.json")
+                    .AddEnvironmentVariables()
+                    .Build();
+
+                configurationBuilder.AddConfiguration(integrationConfig);
+            });
+
+            builder.ConfigureServices((builder, services) =>
+            {
+                services.Remove<DbContextOptions<ApplicationDbContext>>();
+                services.AddDbContext<ApplicationDbContext>(options =>
+                    options.UseInMemoryDatabase("InMemoryDbForTesting")
+                );
+            });
+        }
+    }
+}