Fix failing exception tests when using HttpClient (.NET CoreCLR)

Author: gmarz

src/Tests/ClientConcepts/Exceptions/ExceptionTests.cs

@@ -17,7 +17,12 @@ public void ServerTestWhenThrowExceptionsEnabled()
 				.ThrowExceptions();
 			var client = new ElasticClient(settings);
 			var exception = Assert.Throws<ElasticsearchClientException>(() => client.GetMapping<Project>(s => s.Index("doesntexist")));
+#if DOTNETCORE 
+			// HttpClient does not throw on "known error" status codes (i.e. 404) thus the inner exception should not be set
+			exception.InnerException.Should().BeNull();
+#else
 			exception.InnerException.Should().NotBeNull();
+#endif
 			exception.Response.Should().NotBeNull();
 			exception.Response.ServerError.Should().NotBeNull();
 			exception.Response.ServerError.Status.Should().BeGreaterThan(0);
@@ -40,7 +45,12 @@ public void ServerTestWhenThrowExceptionsDisabled()
 			var settings = new ConnectionSettings(new Uri($"http://{TestClient.Host}:9200"));
 			var client = new ElasticClient(settings);
 			var response = client.GetMapping<Project>(s => s.Index("doesntexist"));
+#if DOTNETCORE 
+			// HttpClient does not throw on "known error" status codes (i.e. 404) thus OriginalException should not be set
+			response.CallDetails.OriginalException.Should().BeNull();
+#else 
 			response.CallDetails.OriginalException.Should().NotBeNull();
+#endif
 			response.CallDetails.ServerError.Should().NotBeNull();
 			response.CallDetails.ServerError.Status.Should().BeGreaterThan(0);
 		}

src/Tests/tests.yaml

@@ -1,5 +1,5 @@
 # mode either u (unit test), i (integration test) or m (mixed mode)
-mode: u
+mode: i
 # the elasticsearch version that should be started
 elasticsearch_version: 2.0.1
 # whether we want to forcefully reseed on the node, if you are starting the tests with a node already running