Python 在单元测试中使用pyodbc

我正在努力为Python编写使用Pyodbc查询本地SQL Server数据库的单元测试

下面的代码运行

import pyodbc
import random
import unittest
from EmailSender import EmailSender

class TestSequenceFunctions(unittest.TestCase):

    def setUp(self):
        self.email_sender = EmailSender()
        self.other_email_sender = EmailSender()

    def test_for_initialisation_variables(self):
        """
        Tests to check that the object is created properly
        """
        self.assertTrue(self.email_sender.server)
        self.assertTrue(self.email_sender.errorLogFile)
        self.assertTrue(self.email_sender.connection)
        self.assertTrue(self.email_sender.cursor)
        self.assertTrue(self.email_sender.siteAuth)
        self.assertTrue(self.email_sender.apiCallsLimitPerRun)

    def test_SQL_Server_Connection(self):
        for value in self.email_sender.cursor.execute("select * from sys.tables"):.
            print value

然而，当我在代码中添加第二个几乎相同的测试时

import pyodbc
import random
import unittest
from EmailSender import EmailSender

class TestSequenceFunctions(unittest.TestCase):

    def setUp(self):
        self.email_sender = EmailSender()
        self.other_email_sender = EmailSender()

    def test_for_initialisation_variables(self):
        """
        Tests to check that the object is created properly
        """
        self.assertTrue(self.email_sender.server)
        self.assertTrue(self.email_sender.errorLogFile)
        self.assertTrue(self.email_sender.connection)
        self.assertTrue(self.email_sender.cursor)
        self.assertTrue(self.email_sender.siteAuth)
        self.assertTrue(self.email_sender.apiCallsLimitPerRun)

    def test_SQL_Server_Connection(self):
        for value in self.email_sender.cursor.execute("select * from sys.tables"):.
            print value

    def test_getSites_method(self):
        for value in self.other_email_sender.cursor.execute("select * from sys.tables"):.
            print value

第三次测试失败，并显示以下错误消息：

错误：（'IM001'，'[IM001][unixODBC][Driver Manager]驱动程序不支持此函数（0）（SQLRowCount））

p、 美国

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需要注意的是，我一开始只创建了一个email\u sender对象，但无法运行背靠背查询，因此将查询更改为相同的，当这不起作用时，添加了另一个连接和游标，这样就不会出现问题：游标的位置。

找到了解决方案-基本上问题出在（默认）拆卸方法

发生了一些事情，所以光标没有被重置-我用下面的代码覆盖了该方法，嘿，普雷斯托，它成功了：

def tearDown(self):
    """
    Make sure we reset the cursor
    """
    if self.email_sender.connection:
        self.email_sender.connection.close()
    del self.email_sender