Python 错误:";字典更新序列元素#0的长度为1;2是必需的“;单元测试
我有两个文件:database_config.py,用于通过DatabaseConfig.yml配置文件检查与数据库的连接。我需要为我的配置文件编写一些测试用例,包括几个场景:Python 错误:";字典更新序列元素#0的长度为1;2是必需的“;单元测试,python,python-unittest,pyyaml,Python,Python Unittest,Pyyaml,我有两个文件:database_config.py,用于通过DatabaseConfig.yml配置文件检查与数据库的连接。我需要为我的配置文件编写一些测试用例,包括几个场景: 如果数据库为空,则测试用例失败 如果数据库不是Sqlite或Postgre,测试用例将失败 我已经创建了一个测试文件,但当我尝试实现它时,我发现了一个错误 ValueError:字典更新序列元素#0的长度为1;2是必需的 谁能帮我一下吗 My DatabaseConfig.yml: database: dbopt:
ValueError:字典更新序列元素#0的长度为1;2是必需的
谁能帮我一下吗
My DatabaseConfig.yml:
database:
dbopt:
host: None
port: 6313
dbname: spam_eggs2
query:
select * from manufacturing_product
我的数据库_config.py:
import yaml
class InvalidConfigError(Exception):
pass
class DB():
def __init__(self, dbconf):
self._dbconf = dict(dbconf)
# checking for database type
dbtype = self.get_db_type()
if dbtype != 'sqlite' and dbtype != 'postgres':
raise InvalidConfigError(
'E01001', 'Invalid database type, should be sqlite or postgres.')
else:
self.dbtype = dbtype
def get_db_type(self):
return self._dbconf['database']
with open('DatabaseConfig.yml') as f:
data = yaml.full_load(f)
for item, doc in data.items():
print(item, ":", doc)
database = DB(data)
import yaml
import unittest
import database_config
class TestDBtype(unittest.TestCase):
#setUpClass gets calls only once where as setUp gets called before every test
@classmethod
def setUpClass(cls):
cls.init_db()
@classmethod
def init_db(cls):
self.db_instance = database_config.DB('DatabaseConfig.yml')
def test_missing_db(self):
self.assertEqual(self.db_instance, None, "Connection returned None.")
def test_db_type(self):
with self.subTest():
self.assertEqual(self.db_instance, 'postgres')
with self.subTest():
self.assertEqual(self.db_instance, 'sqlite')
if __name__ == '__main__':
unittest.main()
数据库的测试文件test\u db\u type.py\u config.py:
import yaml
class InvalidConfigError(Exception):
pass
class DB():
def __init__(self, dbconf):
self._dbconf = dict(dbconf)
# checking for database type
dbtype = self.get_db_type()
if dbtype != 'sqlite' and dbtype != 'postgres':
raise InvalidConfigError(
'E01001', 'Invalid database type, should be sqlite or postgres.')
else:
self.dbtype = dbtype
def get_db_type(self):
return self._dbconf['database']
with open('DatabaseConfig.yml') as f:
data = yaml.full_load(f)
for item, doc in data.items():
print(item, ":", doc)
database = DB(data)
import yaml
import unittest
import database_config
class TestDBtype(unittest.TestCase):
#setUpClass gets calls only once where as setUp gets called before every test
@classmethod
def setUpClass(cls):
cls.init_db()
@classmethod
def init_db(cls):
self.db_instance = database_config.DB('DatabaseConfig.yml')
def test_missing_db(self):
self.assertEqual(self.db_instance, None, "Connection returned None.")
def test_db_type(self):
with self.subTest():
self.assertEqual(self.db_instance, 'postgres')
with self.subTest():
self.assertEqual(self.db_instance, 'sqlite')
if __name__ == '__main__':
unittest.main()
运行测试时发生错误回溯:
(base) D:\Python>python -u "d:\Python\TestDataSource\test_db_type.py"
database : postgres
dbopt : {'host': 'None', 'port': 6313, 'dbname': 'spam_eggs2'}
query : select * from manufacturing_product
E
======================================================================
ERROR: setUpClass (__main__.TestDBtype)
----------------------------------------------------------------------
Traceback (most recent call last):
File "d:\Python\TestDataSource\test_db_type.py", line 9, in setUpClass
cls.init_db()
File "d:\Python\TestDataSource\test_db_type.py", line 13, in init_db
self.db_instance = database_config.DB('DatabaseConfig.yml')
File "d:\Python\TestDataSource\database_config.py", line 8, in __init__
self._dbconf = dict(dbconf)
ValueError: dictionary update sequence element #0 has length 1; 2 is required
----------------------------------------------------------------------
Ran 0 tests in 0.001s
FAILED (errors=1)
(base) D:\Python>C:/Users/duongnb/AppData/Local/Continuum/anaconda3/Scripts/activate
(base) D:\Python>conda activate base
(base) D:\Python>^A
在这里:
将单个字符串参数传递给DB
构造函数;此参数在此处传递:
class DB():
def __init__(self, dbconf):
self._dbconf = dict(dbconf)
但是不能从单个参数创建dict-
dict('DatabaseConfig.yml')
引发错误。我应该怎么做?这是由于yaml文件的结构造成的吗?它发生在您甚至打开yaml文件之前。您可能应该重新考虑您的DB
类。