Added test to ensure that the response id is populated with data. (#63)

Author: Kevin Hellemun

.idea/.idea.BunqSdk/.idea/contentModel.xml

@@ -0,0 +1,39 @@
+using System;
+using Bunq.Sdk.Context;
+using Bunq.Sdk.Exception;
+using Bunq.Sdk.Model.Generated.Endpoint;
+using Xunit;
+
+namespace Bunq.Sdk.Tests.Http
+{
+    public class ResponseIdOnBadRequestTest : BunqSdkTestBase
+    {
+        /// <summary>
+        /// API context to use for the test API calls.
+        /// </summary>
+        private static readonly ApiContext API_CONTEXT = GetApiContext();
+        
+        /// <summary>
+        /// Invalid user id to trigger BadRequestException
+        /// </summary>
+        private static int INVALID_USER_PERSON_ID = 0;
+
+        [Fact]
+        public void TestBadRequestWithResponseId()
+        {
+            ApiException caughtException = null;
+
+            try
+            {
+                UserPerson.Get(API_CONTEXT, INVALID_USER_PERSON_ID);
+            }
+            catch (ApiException e)
+            {
+                caughtException = e;
+            }
+            
+            Assert.NotNull(caughtException);
+            Assert.NotNull(caughtException.ResponsId);
+        }
+    }
+}