text: import os
  import sys
  import time
  
  import pytest
  
  sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
  SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
  
  from helpers.cluster import ClickHouseCluster
  
  cluster = ClickHouseCluster(__file__)
  node = cluster.add_instance(
      "node",
      stay_alive=True,
      main_configs=["config/models_config.xml", "config/catboost_lib.xml"],
  )
  
  
  def copy_file_to_container(local_path, dist_path, container_id):
      os.system(
          "docker cp {local} {cont_id}:{dist}".format(
              local=local_path, cont_id=container_id, dist=dist_path
          )
      )
  
  
  @pytest.fixture(scope="module")
  def started_cluster():
      try:
          cluster.start()
  
          copy_file_to_container(
              os.path.join(SCRIPT_DIR, "model/."),
              "/etc/clickhouse-server/model",
              node.docker_id,
          )
          node.query("CREATE TABLE binary (x UInt64, y UInt64) ENGINE = TinyLog()")
          node.query("INSERT INTO binary VALUES (1, 1), (1, 0), (0, 1), (0, 0)")
  
          node.restart_clickhouse()
  
          yield cluster
  
      finally:
          cluster.shutdown()
  
  
  def test_model_reload(started_cluster):
      if node.is_built_with_memory_sanitizer():
          pytest.skip("Memory Sanitizer cannot work with third-party shared libraries")
  
      node.exec_in_container(
          ["bash", "-c", "rm -f /etc/clickhouse-server/model/model.cbm"]
      )
      node.exec_in_container(
          [
              "bash",
              "-c",
              "ln /etc/clickhouse-server/model/conjunction.cbm /etc/clickhouse-server/model/model.cbm",
          ]
      )
      node.query("SYSTEM RELOAD MODEL model")
  
      result = node.query(
          """
          WITH modelEvaluate('model', toFloat64(x), toFloat64(y)) as prediction, exp(prediction) / (1 + exp(prediction)) as probability
          SELECT if(probability > 0.5, 1, 0) FROM binary;
          """
      )
      assert result == "1\n0\n0\n0\n"
  
      node.exec_in_container(["bash", "-c", "rm /etc/clickhouse-server/model/model.cbm"])
      node.exec_in_container(
          [
              "bash",
              "-c",
              "ln /etc/clickhouse-server/model/disjunction.cbm /etc/clickhouse-server/model/model.cbm",
          ]
      )
      node.query("SYSTEM RELOAD MODEL model")
  
      result = node.query(
          """
          WITH modelEvaluate('model', toFloat64(x), toFloat64(y)) as prediction, exp(prediction) / (1 + exp(prediction)) as probability
          SELECT if(probability > 0.5, 1, 0) FROM binary;
          """
      )
      assert result == "1\n1\n1\n0\n"
  
  
  def test_models_reload(started_cluster):
      if node.is_built_with_memory_sanitizer():
          pytest.skip("Memory Sanitizer cannot work with third-party shared libraries")
  
      node.exec_in_container(
          ["bash", "-c", "rm -f /etc/clickhouse-server/model/model.cbm"]
      )
      node.exec_in_container(
          [
              "bash",
              "-c",
              "ln /etc/clickhouse-server/model/conjunction.cbm /etc/clickhouse-server/model/model.cbm",
          ]
      )
      node.query("SYSTEM RELOAD MODELS")
  
      result = node.query(
          """
          WITH modelEvaluate('model', toFloat64(x), toFloat64(y)) as prediction, exp(prediction) / (1 + exp(prediction)) as probability
          SELECT if(probability > 0.5, 1, 0) FROM binary;
          """
      )
      assert result == "1\n0\n0\n0\n"
  
      node.exec_in_container(["bash", "-c", "rm /etc/clickhouse-server/model/model.cbm"])
      node.exec_in_container(
          [
              "bash",
              "-c",
              "ln /etc/clickhouse-server/model/disjunction.cbm /etc/clickhouse-server/model/model.cbm",
          ]
      )
      node.query("SYSTEM RELOAD MODELS")
  
      result = node.query(
          """
          WITH modelEvaluate('model', toFloat64(x), toFloat64(y)) as prediction, exp(prediction) / (1 + exp(prediction)) as probability
          SELECT if(probability > 0.5, 1, 0) FROM binary;
          """
      )
      assert result == "1\n1\n1\n0\n"
  