Cover text_log.level

dbms/tests/integration/test_text_log_level/configs/config.d/text_log.xml

+<yandex>
+    <text_log>
+        <level>information</level>
+    </text_log>
+</yandex>

dbms/tests/integration/test_text_log_level/test.py

+# pylint: disable=unused-argument
+# pylint: disable=redefined-outer-name
+
+import pytest
+
+from helpers.cluster import ClickHouseCluster
+from helpers.client import QueryRuntimeException
+
+cluster = ClickHouseCluster(__file__)
+
+node = cluster.add_instance('node', config_dir='configs')
+
+@pytest.fixture(scope='module')
+def start_cluster():
+    try:
+        cluster.start()
+
+        yield cluster
+    finally:
+        cluster.shutdown()
+
+def test_basic(start_cluster):
+    with pytest.raises(QueryRuntimeException):
+        # generates log with "Error" level
+        node.query('SELECT * FROM no_such_table')
+
+    node.query('SYSTEM FLUSH LOGS')
+
+    assert int(node.query("SELECT count() FROM system.text_log WHERE level = 'Trace'")) == 0
+    assert int(node.query("SELECT count() FROM system.text_log WHERE level = 'Debug'")) == 0
+    assert int(node.query("SELECT count() FROM system.text_log WHERE level = 'Information'")) >= 1
+    assert int(node.query("SELECT count() FROM system.text_log WHERE level = 'Error'")) >= 1