我正在尝试为Bar编写单元测试,以对Foo的方法read()进行调用.我在setUp()中添加了patch命令,因为其他测试也将使用此补丁.
题
如何检查期望的参数是否调用了read()函数?
码
foo.py
class Foo(object):
def __init__(self):
self.table = {'foo': 1}
def read(self, name):
return self.table[name]
bar.py
import foo
class Bar(object):
def act(self):
a = foo.Foo()
return a.read('foo')
test_bar.py
import bar
import unittest
from mock import patch
class TestBar(unittest.TestCase):
def setUp(self):
self.foo_mock = patch('bar.foo.Foo', autospec=True).start()
self.addCleanup(patch.stopall)
def test_can_call_foo_with_correct_arguments(self):
a = bar.Bar()
a.act()
self.foo_mock.read.assert_called_once_with('foo')
输出量
python -m unittest发现
F
======================================================================
FAIL: test_can_call_foo_with_correct_arguments (test_bar.TestBar)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/test_dir/test_bar.py", line 12, in test_can_call_foo_with_correct_arguments
self.foo_mock.read.assert_called_once_with('foo')
File "/usr/local/lib/python2.7/dist-packages/mock.py", line 845, in assert_called_once_with
raise AssertionError(msg)
AssertionError: Expected to be called once. Called 0 times.
----------------------------------------------------------------------
Ran 1 test in 0.001s
FAILED (failures=1)