[英]Python mocking function from imported module
如何為以下代碼編寫單元測試用例。 該代碼僅返回一個數據庫連接。 我無法創建真正的數據庫連接。 所以,我依賴於對象模擬。
文件:code.py
import snowflake.connector
import logging
import simplejson as json
def get_database_connection(user, password, account, warehouse, database=None, schema=None):
logging.info("DB Connection : START : " + __name__)
try:
return snowflake.connector.connect(
user=user,
password=password,
account=account,
warehouse=warehouse,
database=database,
schema=schema
)
except Exception:
logging.exception("Exception while creating connection")
測試代碼.py
class SnowflakeDbTest(unittest.TestCase):
def test_get_database_connection(self):
snowflake = Mock()
snowflake.connector.return_value = Mock()
snowflake.connector.connect.return_value = "dbconnection"
self.assertEqual("dbconnection", code.get_database_connection("user", "password", "account", "warehouse", database=None, schema=None))
解決方案
@patch('code.snowflake.connector')
def test_get_database_connection(self, mock_connection):
mock_connection.connect.return_value = "dbconnection"
self.assertEqual("dbconnection", snowflakedb.get_database_connection("user", "password", "account", "warehouse", database=None, schema=None))
如何模擬在“code.py”中導入的“snowflake.connector”
修補是解決方案
@patch('code.snowflake.connector')
def test_get_database_connection(self, mock_connection):
mock_connection.connect.return_value = "dbconnection"
self.assertEqual("dbconnection", snowflakedb.get_database_connection("user", "password", "account", "warehouse", database=None, schema=None))
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