Cover buffer_profile config directive

tests/integration/test_buffer_profile/configs/buffer_profile.xml

@@ -0,0 +1,3 @@
+<yandex>
+    <buffer_profile>buffer_profile</buffer_profile>
+</yandex>

tests/integration/test_buffer_profile/configs/users.d/buffer_profile.xml

@@ -0,0 +1,8 @@
+<yandex>
+    <profiles>
+        <buffer_profile>
+            <max_partitions_per_insert_block>1</max_partitions_per_insert_block>
+        </buffer_profile>
+    </profiles>
+</yandex>
+

tests/integration/test_buffer_profile/test.py

@@ -0,0 +1,54 @@
+# pylint: disable=unused-argument
+# pylint: disable=redefined-outer-name
+# pylint: disable=line-too-long
+
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+from helpers.client import QueryRuntimeException
+
+cluster = ClickHouseCluster(__file__)
+
+node_default = cluster.add_instance('node_default')
+node_buffer_profile = cluster.add_instance('node_buffer_profile',
+    main_configs=['configs/buffer_profile.xml'],
+    user_configs=['configs/users.d/buffer_profile.xml'])
+
+@pytest.fixture(scope='module', autouse=True)
+def start_cluster():
+    try:
+        cluster.start()
+        yield cluster
+    finally:
+        cluster.shutdown()
+
+def bootstrap(node):
+    node.query("""
+    CREATE TABLE data (key Int) Engine=MergeTree()
+    ORDER BY key
+    PARTITION BY key % 2;
+
+    CREATE TABLE buffer AS data Engine=Buffer(currentDatabase(), data,
+            /* settings for manual flush only */
+            1,    /* num_layers */
+            10e6, /* min_time, placeholder */
+            10e6, /* max_time, placeholder */
+            0,    /* min_rows   */
+            10e6, /* max_rows   */
+            0,    /* min_bytes  */
+            80e6  /* max_bytes  */
+    );
+
+    INSERT INTO buffer SELECT * FROM numbers(100);
+    """)
+
+def test_default_profile():
+    bootstrap(node_default)
+    # flush the buffer
+    node_default.query('OPTIMIZE TABLE buffer')
+
+def test_buffer_profile():
+    bootstrap(node_buffer_profile)
+    with pytest.raises(QueryRuntimeException, match='Too many partitions for single INSERT block'):
+        # flush the buffer
+        node_buffer_profile.query('OPTIMIZE TABLE buffer')