finished writing tests for episodes controller. started writing tests for seasons controller. add http client factory class for integration tests

server.tests/Http/HttpClientFactory.cs

@@ -0,0 +1,20 @@
+using Microsoft.AspNetCore.Mvc.Testing;
+
+namespace server.tests.Http
+{
+    internal static class HttpClientFactory
+    {
+
+
+        public static HttpClient GetHttpClient(int version)
+        {
+            var webAppFactory = new WebApplicationFactory<Program>();
+
+            var client = webAppFactory.CreateDefaultClient();
+
+            client.DefaultRequestHeaders.Add("x-api-version", version.ToString());
+
+            return client;
+        }
+    }
+}