[英]How can I pass a file to unittest.mock.mock_open()?
我有一個讀取日志文件並篩選結果的功能,並且我想測試以確保其正確篩選。
我的密碼
import os
import random
import unittest
from unittest.mock import patch, mock_open
__SAMPLE_LOG__ = os.path.join(settings.BASE_DIR, "apps/tests/log_viewer/sample_logs/sample_manager_log.log")
class FilterLog(unittest.TestCase):
def setUp(self):
with open(__SAMPLE_LOG__) as f:
self.sample_data = f.read()
@patch('builtins.open', new_callable = mock_open, read_data = self.sample_data)
def test_filterDate(self, mock_file):
day = '08'
month = '08'
year = '2019'
results = filter_log(filter_by = 'date', day = day, month = month, year = year)
self.assertEqual(open(settings.ACTIVITY_LOG_FILE).read(), self.sample_data)
錯誤
@patch('builtins.open',new_callable =模擬打開,read_data = self.sample_data)
NameError:名稱“ self”未定義
我的問題
我應該如何將數據傳遞給mock_open()
? 我覺得在文件頂部with open() ... read()
是一種不好的做法,也不能將其設置為類變量(可以嗎?),那我有什么選擇呢?
文件說什么
從文檔中 read_data
接受一個字符串,因此我需要以某種方式將文件讀取到一個變量中並傳遞給它。但是讀取文件在哪里合適呢? 在模塊的頂部,在類的開頭,還是在setUp()
?
這應該工作。 我將sample_data帶出課堂。
import os
import random
import unittest
from unittest.mock import patch, mock_open
__SAMPLE_LOG__ = os.path.join(settings.BASE_DIR, "apps/tests/log_viewer/sample_logs/sample_manager_log.log")
# read your test data in sample_data
with open(__SAMPLE_LOG__) as f:
sample_data = f.read()
class FilterLog(unittest.TestCase):
@patch('builtins.open', new_callable = mock_open, read_data = sample_data)
def test_filterDate(self, mock_file):
day = '08'
month = '08'
year = '2019'
results = filter_log(filter_by = 'date', day = day, month = month, year = year)
self.assertEqual(open(settings.ACTIVITY_LOG_FILE).read(), sample_data)
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