client_spec.rb in elasticsearch-transport-7.8.0.pre

- old
+ new

@@ -1,13 +1,25 @@
-# Licensed to Elasticsearch B.V under one or more agreements.
-# Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
-# See the LICENSE file in the project root for more information
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 
 require 'spec_helper'
 
 describe Elasticsearch::Transport::Client do
-
   let(:client) do
     described_class.new.tap do |_client|
       allow(_client).to receive(:__build_connections)
     end
   end
@@ -1128,9 +1140,35 @@
         it 'uses X-Opaque-Id in the header' do
           allow(client).to receive(:perform_request) { OpenStruct.new(body: '') }
           expect { client.search(opaque_id: 'opaque_id') }.not_to raise_error
           expect(client).to have_received(:perform_request)
             .with('GET', '_search', { opaque_id: 'opaque_id' }, nil, {})
+        end
+      end
+    end
+
+    context 'when Elasticsearch response includes a warning header' do
+      let(:client) do
+        Elasticsearch::Transport::Client.new(hosts: hosts)
+      end
+
+      let(:warning) { 'Elasticsearch warning: "deprecation warning"' }
+
+      it 'prints a warning' do
+        allow_any_instance_of(Elasticsearch::Transport::Transport::Response).to receive(:headers) do
+          { 'warning' => warning }
+        end
+
+        begin
+          stderr      = $stderr
+          fake_stderr = StringIO.new
+          $stderr     = fake_stderr
+
+          client.perform_request('GET', '/')
+          fake_stderr.rewind
+          expect(fake_stderr.string).to eq("warning: #{warning}\n")
+        ensure
+          $stderr = stderr
         end
       end
     end
 
     context 'when a header is set on an endpoint request' do