[7.x] Move client meta header logic to Transport

Co-authored-by: Seth Michael Larson <[email protected]>

test_elasticsearch/test_utils.py

@@ -0,0 +1,27 @@
+#  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.
+
+import pytest
+from elasticsearch.utils import _client_meta_version
+
+
+@pytest.mark.parametrize(
+    ["version", "meta_version"],
+    [("1.26.3", "1.26.3"), ("7.10.1a1", "7.10.1p"), ("7.10.pre", "7.10p")],
+)
+def test_client_meta_version(version, meta_version):
+    assert _client_meta_version(version) == meta_version