Improve failing tests debugging output

Author: William Denton

src/Elasticsearch.Net.Aws/ElasticSearch.Net.Aws.IntegrationTests/PostTests.cs

@@ -22,6 +22,7 @@ public void Setup()
             var httpConnection = new AwsHttpConnection(Region);
             var pool = new SingleNodeConnectionPool(new Uri(TestConfig.Endpoint));
             var config = new ConnectionConfiguration(pool, httpConnection);
+            config.DisableDirectStreaming();
             _client = new ElasticLowLevelClient(config);
             _indexName = $"unittest_{Guid.NewGuid().ToString("n")}";
         }
@@ -37,9 +38,9 @@ public void SimplePost_should_work()
         {
             var id = Guid.NewGuid().ToString("n");
             var response = _client.Create<VoidResponse>(_indexName, id, PostData.Serializable(new { message = "Hello, World!" }));
-            Assert.AreEqual(true, response.Success);
+            Assert.AreEqual(true, response.Success, response.DebugInformation);
             var getResponse = _client.Get<StringResponse>(_indexName, id);
-            Assert.AreEqual(true, getResponse.Success);
+            Assert.AreEqual(true, getResponse.Success, getResponse.DebugInformation);
             StringAssert.Contains("Hello, World!", getResponse.Body);
         }
     }

src/Elasticsearch.Net.Aws/Elasticsearch.Net.Aws/AwsHttpConnection.cs

@@ -65,7 +65,16 @@ private void SignRequest(IRequest request, RequestData requestData)
                     }
                 }
             }
-            var credentials = _credentials.GetCredentials();
+            ImmutableCredentials credentials;
+            try
+            {
+                credentials = _credentials.GetCredentials();
+            }
+            catch (Exception e)
+            {
+                throw new Exception("Unable to retrieve credentials required to sign the request.", e);
+            }
+
             if (credentials == null)
             {
                 throw new Exception("Unable to retrieve credentials required to sign the request.");