Django1.10文档学习笔记四

16 应用测试

编写第一个测试程序

先在admin后台创建一个发布日期在未来的question,在shell中验证这个bug

>>> import datetime

>>> from django.utils import timezone

>>> from polls.models import Question

>>> q.was_published_recently()

True

通过自动化测试来完成这个操作

Models.py

def was_published_recently(self):
    now = timezone.now()
    return now - datetime.timedelta(days=1) <= self.pub_date <= now

test.py

from django.test import TestCase
import datetime
from django.utils import timezone
from .models import Question

# Create your tests here.

'''
问卷测试
'''
def test_was_published_recently_with_old_question(self):
    """
        日期超过1天的将返回False。这里创建了一个30天前发布的实例。
    """
    time = timezone.now() - datetime.timedelta(days=30)
    old_question = Question(pub_date=time)

    self.assertIs(old_question.was_published_recently(), False)


def test_was_published_recently_with_recent_question(self):
    """
      最近一天内的将返回True。这里创建了一个1小时内发布的实例。
    """
    time = timezone.now() - datetime.timedelta(hours=1)
    recent_question = Question(pub_date=time)
    self.assertIs(recent_question.was_published_recently(), True)

17 测试一个视图

测试用客户端

>>> from django.test.utils import setup_test_environment

>>> setup_test_environment

<function setup_test_environment at 0x0310DC00>

>>>

>>> from django.test import Client #导入客户端

>>> client=Client()#创建一个实例

>>> response=client.get('/')#从/获取响应

Not Found: /

>>> response.status_code#从这个地址返回的是404

404

>>> from django.urls import reverse

>>> response=client.get(reverse('polls:index'))#通过polls获取内容

>>> response.status_code

200

>>> response.content#取得response的正文内容

b'    <ul>                    <li>                                <a href="/polls/3/">                    test case                </a>                                <a href="/polls/3/">

                   test case                </a>            </li>                    <li>                                <a href="/polls/2/">                    what is your name ?

        </a>                                <a href="/polls/2/">                    what is your name ?                </a>            </li>                    <li>                

         <a href="/polls/1/">                    what is up?                </a>                                <a href="/polls/1/">                    what is up?                </a>

  </li>            </ul> '

>>>

修改views.py

# 最近的5个调查问卷
def get_queryset(self):
    # return Question.objects.order_by('-pub_date')[:5]

#查询的结果在当前时间之前,不包含将来的时间

   return Question.objects.filter(pub_date__lte=timezone.now()).order_by('-pub_date')[:5]

编写自动作测试

 from django.test import TestCase
import datetime
from django.utils import timezone
from .models import Question
from django.urls import reverse

# Create your tests here.

'''
问卷测试
'''


def test_was_published_recently_with_old_question(self):
    """
        日期超过1天的将返回False。这里创建了一个30天前发布的实例。
    """
    time = timezone.now() - datetime.timedelta(days=30)
    old_question = Question(pub_date=time)

    self.assertIs(old_question.was_published_recently(), False)


def test_was_published_recently_with_recent_question(self):
    """
      最近一天内的将返回True。这里创建了一个1小时内发布的实例。
    """
    time = timezone.now() - datetime.timedelta(hours=1)
    recent_question = Question(pub_date=time)
    self.assertIs(recent_question.was_published_recently(), True)


'''
创建question,
question_text   问卷的文本内容
days 当前时间的偏移天数,负值表过去,正值表将来
'''


def create_question(question_text, days):
    time = timezone.now() + datetime.timedelta(days=days)
    return Question.objects.create(question_text=question_text, pub_date=time)


class QuestionViewTests(TestCase):
    #
    def test_index_viewwith_no_questions(self):
        response = self.client.get(reverse('polls:index'))
        # 返回状态码正常
        self.assertEquals(response.status_code, 200)
        self.assertContains(response, 'no polls are available.')
        self.assertQuerysetEqual(response.context['latest_question_list'], [])


def test_index_view_with_a_past_question(self):
    """        发布日期在过去的问卷将在index页面显示。        """
    create_question(question_text="Past question.", days=-30)
    response = self.client.get(reverse('polls:index'))

    self.assertQuerysetEqual(
        response.context['latest_question_list'],
        ['<Question: Past question.>']
    )


def test_index_view_with_a_future_question(self):
    """        发布日期在将来的问卷不会在index页面显示        """
    create_question(question_text="Future question.", days=30)
    response = self.client.get(reverse('polls:index'))

    self.assertContains(response, "No polls are available.")
    self.assertQuerysetEqual(response.context['latest_question_list'], [])


def test_index_view_with_future_question_and_past_question(self):
    """        即使同时存在过去和将来的问卷，也只有过去的问卷会被显示。        """
    create_question(question_text="Past question.", days=-30)
    create_question(question_text="Future question.", days=30)
    response = self.client.get(reverse('polls:index'))
    self.assertQuerysetEqual(
        response.context['latest_question_list'],
        ['<Question: Past question.>']
    )


def test_index_view_with_two_past_questions(self):
    """        index页面可以同时显示多个问卷。        """
    create_question(question_text="Past question 1.", days=-30)
    create_question(question_text="Past question 2.", days=-5)
    response = self.client.get(reverse('polls:index'))
    self.assertQuerysetEqual(
        response.context['latest_question_list'],
        ['<Question: Past question 2.>', '<Question: Past question 1.>']
    )