Add integration test for input_format_parallel_parsing memory tracking

tests/integration/test_input_format_parallel_parsing_memory_tracking/configs/conf.xml

@@ -0,0 +1,4 @@
+<yandex>
+    <!-- make it fail earlier -->
+    <max_server_memory_usage>3000000000</max_server_memory_usage> <!-- 3GB -->
+</yandex>

tests/integration/test_input_format_parallel_parsing_memory_tracking/test.py

@@ -0,0 +1,33 @@
+# pylint: disable=unused-argument
+# pylint: disable=redefined-outer-name
+# pylint: disable=line-too-long
+
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+
+cluster = ClickHouseCluster(__file__)
+
+instance = cluster.add_instance('instance', main_configs=['configs/conf.xml'])
+
+@pytest.fixture(scope='module', autouse=True)
+def start_cluster():
+    try:
+        cluster.start()
+        yield cluster
+    finally:
+        cluster.shutdown()
+
+# max_memory_usage_for_user cannot be used, since the memory for user accounted
+# correctly, only total is not
+def test_memory_tracking_total():
+    instance.query('''
+        CREATE TABLE null (row String) ENGINE=Null;
+    ''')
+    instance.exec_in_container(['bash', '-c',
+        'clickhouse client -q "SELECT arrayStringConcat(arrayMap(x->toString(cityHash64(x)), range(1000)), \' \') from numbers(10000)" > data.json'])
+    for it in range(0, 20):
+        # the problem can be triggered only via HTTP,
+        # since clickhouse-client parses the data by itself.
+        assert instance.exec_in_container(['curl', '--silent', '--show-error', '--data-binary', '@data.json',
+            'http://127.1:8123/?query=INSERT%20INTO%20null%20FORMAT%20TSV']) == '', 'Failed on {} iteration'.format(it)