[SM-153] Add scaffolded API integration test project (#2209)

test/Api.IntegrationTest/Factories/ApiApplicationFactory.cs

@@ -0,0 +1,44 @@
+using Bit.Core.Models.Api.Request.Accounts;
+using Bit.IntegrationTestCommon.Factories;
+using IdentityServer4.AccessTokenValidation;
+using Microsoft.AspNetCore.TestHost;
+
+namespace Bit.Api.IntegrationTest.Factories
+{
+    public class ApiApplicationFactory : WebApplicationFactoryBase<Startup>
+    {
+        private readonly IdentityApplicationFactory _identityApplicationFactory;
+
+        public ApiApplicationFactory()
+        {
+            _identityApplicationFactory = new IdentityApplicationFactory();
+        }
+
+        protected override void ConfigureWebHost(IWebHostBuilder builder)
+        {
+            base.ConfigureWebHost(builder);
+
+            builder.ConfigureTestServices(services =>
+            {
+                services.PostConfigure<IdentityServerAuthenticationOptions>(IdentityServerAuthenticationDefaults.AuthenticationScheme, options =>
+                {
+                    options.JwtBackChannelHandler = _identityApplicationFactory.Server.CreateHandler();
+                });
+            });
+        }
+
+        /// <summary>
+        /// Helper for registering and logging in to a new account
+        /// </summary>
+        public async Task<(string Token, string RefreshToken)> LoginWithNewAccount(string email = "integration-test@bitwarden.com", string masterPasswordHash = "master_password_hash")
+        {
+            await _identityApplicationFactory.RegisterAsync(new RegisterRequestModel
+            {
+                Email = email,
+                MasterPasswordHash = masterPasswordHash,
+            });
+
+            return await _identityApplicationFactory.TokenFromPasswordAsync(email, masterPasswordHash);
+        }
+    }
+}