Add for interaction between old and new versions of clickhouse

dbms/tests/integration/test_old_versions_client/test.py

@@ -0,0 +1,48 @@
+import time
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+from multiprocessing.dummy import Pool
+from helpers.client import QueryRuntimeException, QueryTimeoutExceedException
+
+from helpers.test_tools import assert_eq_with_retry
+cluster = ClickHouseCluster(__file__)
+node18_14 = cluster.add_instance('node18_14', image='yandex/clickhouse-server:18.14.19', with_installed_binary=True)
+node19_1 = cluster.add_instance('node19_1', image='yandex/clickhouse-server:19.1.16', with_installed_binary=True)
+node19_4 = cluster.add_instance('node19_4', image='yandex/clickhouse-server:v19.4.5.35', with_installed_binary=True)
+node19_6 = cluster.add_instance('node19_6', image='yandex/clickhouse-server:19.6.3.18', with_installed_binary=True)
+node_new = cluster.add_instance('node_new')
+
+@pytest.fixture(scope="module")
+def setup_nodes():
+    try:
+        cluster.start()
+        for n in (node18_14, node19_1, node19_4, node19_6, node_new):
+            n.query('''CREATE TABLE test_table (date Date, id UInt32, value UInt64) ENGINE = MergeTree() ORDER BY tuple()''')
+    finally:
+        cluster.shutdown()
+
+
+def query_from_one_node_to_another(client_node, server_node, query):
+        client_node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --host {} --query '{}'".format(server_node.name, query)])
+
+def test_client_from_different_versions(setup_nodes):
+    old_nodes = (node18_14, node19_1, node19_4, node19_6,)
+    # from new to old
+    for n in old_nodes:
+        query_from_one_node_to_another(node_new, n, "INSERT INTO test_table VALUES (toDate('2018-10-01'), 1, 1)")
+
+    for n in old_nodes:
+        query_from_one_node_to_another(node_new, n, "SELECT COUNT() FROM test_table")
+
+    for n in old_nodes:
+        assert n.query("SELECT COUNT() FROM test_table") == "1\n"
+
+    # from old to new
+    for i, n in enumerate(old_nodes):
+        query_from_one_node_to_another(n, node_new, "INSERT INTO test_table VALUES (toDate('2018-10-01'), {i}, {i})".format(i))
+
+    for n in old_nodes:
+        query_from_one_node_to_another(n, node_new, "SELECT COUNT() FROM test_table")
+
+    assert n.query("SELECT COUNT() FROM test_table") == str(len(old_nodes)) + "\n"