我在Python2中有这个代码段:
def super_cool_method():
con = psycopg2.connect(**connection_stuff)
cur = con.cursor(cursor_factory=DictCursor)
cur.execute("Super duper SQL query")
rows = cur.fetchall()
for row in rows:
# do some data manipulation on row
return rows
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我想写一些单元测试.我想知道如何使用mock.patch它来修补光标和连接变量,以便它们返回一组伪造的数据?我为我的单元测试尝试了以下代码段,但无济于事:
@mock.patch("psycopg2.connect")
@mock.patch("psycopg2.extensions.cursor.fetchall")
def test_super_awesome_stuff(self, a, b):
testing = super_cool_method()
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但我似乎得到以下错误:
TypeError: can't set attributes of built-in/extension type 'psycopg2.extensions.cursor'
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