标签：def else contain split providing 轻量级 some 关系 val
测试过程中经常伴随着某种外部依赖，列举如下：
大多数实际的测试需要各种形式的数据，通常情况下，数据从数据库中读取。下面是一些控制数据源依赖关系的技术
为控制系统之外资源的行为，可以虚拟化它们，即构造另一个版本的资源，新的版本可以模拟原有资源的API，而不需要内部实现。有如下技术：
为测试期间的函数调用提供标准相应
仿制并代替实际对象的API
可以提供一个非常轻量级的实现
本文先讲解仿制技术，其他方式后续进行补充！
datetimehelper.py代码如下：
# Code Listing #3
""" Module datetime helper - Contains the class DateTimeHelper providing
some helpful methods for working with date and datetime objects """
import datetime
class DateTimeHelper(object):
""" A class which provides some convenient date/time
conversion and utility methods """
def today(self):
""" Return today‘s datetime """
return datetime.datetime.now()
def date(self):
""" Return today‘s date in the form of DD/MM/YYYY """
return self.today().strftime("%d/%m/%Y")
def weekday(self):
""" Return the full week day for today """
return self.today().strftime("%A")
def us_to_indian(self, date):
""" Convert a U.S style date i.e mm/dd/yy to Indian style i.e dd/mm/yyyy """
# Split it
mm, dd, yy = date.split(‘/‘)
yy = int(yy)
# Check if year is >16, else add 2000 to it
if yy <= 16:
yy += 2000
# Create a date object from it
date_obj = datetime.date(year=yy, month=int(mm), day=int(dd))
# Return it in correct format
return date_obj.strftime("%d/%m/%Y")
测试代码如下：
# Code Listing #5
""" Module test_datetimehelper - Unit test module for testing datetimehelper module """
# Note - This is the second version of test_datetimehelper module so named as test_datetimehelper2.py
import unittest
import datetime
import datetimehelper
from unittest.mock import patch
class DateTimeHelperTestCase(unittest.TestCase):
""" Unit-test testcase class for DateTimeHelper class """
def setUp(self):
self.obj = datetimehelper.DateTimeHelper()
def test_date(self):
""" Test date() method """
# Put a specific date to test
my_date = datetime.datetime(year=2016, month=8, day=16)
# Patch the ‘today‘ method with a specific return value
with patch.object(self.obj, ‘today‘, return_value=my_date):
response = self.obj.date()
self.assertEqual(response, ‘16/08/2016‘)
def test_weekday(self):
""" Test weekday() method """
# Put a specific date to test
my_date = datetime.datetime(year=2016, month=8, day=21)
# Patch the ‘today‘ method with a specific return value
with patch.object(self.obj, ‘today‘, return_value=my_date):
response = self.obj.weekday()
self.assertEqual(response, ‘Sunday‘)
def test_us_india_conversion(self):
""" Test us=>india date format conversion """
# Test a few dates
d1 = ‘08/12/16‘
d2 = ‘07/11/2014‘
d3 = ‘04/29/00‘
self.assertEqual(self.obj.us_to_indian(d1), ‘12/08/2016‘)
self.assertEqual(self.obj.us_to_indian(d2), ‘11/07/2014‘)
self.assertEqual(self.obj.us_to_indian(d3), ‘29/04/2000‘)
if __name__ == "__main__":
unittest.main()
标签：def else contain split providing 轻量级 some 关系 val
原文地址：https://www.cnblogs.com/hester/p/12121617.html
