我正在使用postgresql并且我已经使用MagicMock进行测试,但我不确定我是否已经完成了模拟的概念。这是我的示例代码(我有一个dbname = test,table = py_test和user = simone):
import psycopg2
import sys
from mock import Mock, patch
import unittest
from mock import MagicMock
from collections import Counter
import doctest
class db(object):
def __init__(self,database, user):
self.con = None
self.database = database
self.user = user
def test_connection(self):
"""Connection DB"""
try:
self.con = psycopg2.connect(database=self.database, user=self.user)
return True
except psycopg2.DatabaseError, e:
print 'Error %s' % e
return False
def test_empty_table(self,table):
"""empty table?"""
try:
cur = self.con.cursor()
cur.execute('SELECT * from ' + table )
ver = cur.fetchone()
return ver
except psycopg2.DatabaseError, e:
print 'Error %s' % e
def test_data_type(self, table, column):
"""data type"""
try:
cur = self.con.cursor()
cur.execute("SELECT data_type from information_schema.columns where table_name = '"+ table + "' and column_name= '"+column+"'")
ver = cur.fetchone()
return ver
except psycopg2.DatabaseError, e:
print 'Error %s' % e
def __del__(self):
if self.con:
self.con.close()
class test_db(unittest.TestCase):
def testing(self):
tdb = db('test','simone')
self.assertTrue(tdb.test_connection(), 1)
self.assertTrue(tdb.test_empty_table('py_test'), 1)
self.assertTrue(tdb.test_data_type('py_test','id'), int)
class test_mock(object):
def __init__(self, db):
self.db = db
def execute(self, nomedb, user, table, field):
self.db(nomedb, user)
self.db.test_connection()
self.db.test_empty_table(table)
self.db.test_data_type(table, field)
if __name__ == "__main__":
c = MagicMock()
d = test_mock(c)
d.execute('test','simone','py_test','id')
method_count = Counter([str(method) for method in c.method_calls])
print c.method_calls
print method_count
print c.mock_calls
答案 0 :(得分:2)
也许我会给你一些使用Mockito包进行模拟的其他例子:
import sphinxsearch
import unittest
from mockito import mock, when, unstub, verify
class SearchManagerTest(unittest.TestCase):
def setUp(self):
self.sphinx_client = mock()
when(sphinxsearch).SphinxClient().thenReturn(self.sphinx_client)
def tearDown(self):
unstub()
def test_search_manager(self):
# given
value = {'id': 142564}
expected_result = 'some value returned from SphinxSearch'
# when
search_manager = SearchManager()
result = search_manager.get(value)
# then
verify(self.sphinx_client).SetServer('127.0.0.1', 9312)
verify(self.sphinx_client).SetMatchMode(sphinxsearch.SPH_MATCH_ALL)
verify(self.sphinx_client).SetRankingMode(sphinxsearch.SPH_RANK_WORDCOUNT)
self.assertEqual(result, expected_result)
主要概念是替换一些在其他地方测试的模块(模拟)(它有自己的unittest模块)并记录一些行为。
替换模块您可以使用mock:
self.sphinx_client = mock()
然后在这个模拟上记录如果你调用特定方法,这个方法将返回一些数据 - 如果需要检查行为,则返回简单的值,如字符串或模拟数据:
when(sphinxsearch).SphinxClient().thenReturn(self.sphinx_client)
在这种情况下,如果您导入 sphinxsearch 模块并在其上调用 SphinxClient(),则告诉您,您将获得模拟对象。
然后主要测试进来。你调用方法或对象来测试(这里是SearchManager)。它的主体使用一些给定的值进行测试:
self.search_manager = SearchManager()
当部分验证是否有某些操作:
verify(self.sphinx_client).SetServer('127.0.0.1', 9312)
verify(self.sphinx_client).SetMatchMode(sphinxsearch.SPH_MATCH_ALL)
verify(self.sphinx_client).SetRankingMode(sphinxsearch.SPH_RANK_WORDCOUNT)
此处 - 如果在 self.sphinx_client 上调用 SetServer ,参数'127.0.0.1'且 9312 。另外两行是如上所述的自解释。
我们在这里进行正常检查:
self.assertEqual(result, expected_result)