Tutorial 5 done // Write Testcases for poll

djlearn/polls/models.py

@@ -12,7 +12,8 @@ class Question(models.Model):
         return self.question_text
 
     def was_published_recently(self):
-        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
+        now = timezone.now()
+        return now - datetime.timedelta(days=1) <= self.pub_date <= now
 
     question_text = models.CharField(max_length=200)
     pub_date = models.DateTimeField('date published')

djlearn/polls/tests.py

@@ -1,3 +1,127 @@
+import datetime
 from django.test import TestCase
+from django.utils import timezone
+from django.urls import reverse
+from random import randrange
+from .models import Question
 
 # Create your tests here.
+
+def create_question(question_text, days):
+    """
+    Create a question with the given `question_text` and published the
+    given number of `days` offset to now (negative for questions published
+    in the past, positive for questions that have yet to be published).
+    """
+    time = timezone.now() + datetime.timedelta(days=days)
+    return Question.objects.create(question_text=question_text, pub_date=time)
+
+
+class QuestionModelTest(TestCase):
+
+    def test_was_published_recently_with_future_question(self):
+        """
+        was_published_recently() returns False for questions whose pub_date
+        is in the future.
+        """
+        time = timezone.now() + datetime.timedelta(days=randrange(1, 365))
+        future_question = Question(pub_date=time)
+        self.assertIs(future_question.was_published_recently(), False)
+
+    def test_was_published_recently_with_old_question(self):
+        """
+        was_published_recently() returns False for questions whose pub_date
+        is older than 1 day.
+        """
+        time = timezone.now() - datetime.timedelta(days=randrange(1, 365), seconds=1)
+        old_question = Question(pub_date=time)
+        self.assertIs(old_question.was_published_recently(), False)
+
+    def test_was_published_recently_with_recent_question(self):
+        """
+        was_published_recently() returns True for questions whose pub_date
+        is within the last day.
+        """
+        time = timezone.now() - datetime.timedelta(hours=23, minutes=59, seconds=59)
+        recent_question = Question(pub_date=time)
+        self.assertIs(recent_question.was_published_recently(), True)
+
+
+class QuestionIndexViewTests(TestCase):
+    def test_no_questions(self):
+        """
+        If no questions exist, an appropriate message is displayed.
+        """
+        response = self.client.get(reverse('polls:index'))
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "No polls are available.")
+        self.assertQuerysetEqual(response.context['latest_question_list'], [])
+
+    def test_past_question(self):
+        """
+        Questions with a pub_date in the past are displayed on the
+        index page.
+        """
+        question = create_question(question_text="Past question.", days=-30)
+        response = self.client.get(reverse('polls:index'))
+        self.assertQuerysetEqual(
+            response.context['latest_question_list'],
+            [question],
+        )
+
+    def test_future_question(self):
+        """
+        Questions with a pub_date in the future aren't displayed on
+        the index page.
+        """
+        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_future_question_and_past_question(self):
+        """
+        Even if both past and future questions exist, only past questions
+        are displayed.
+        """
+        question = 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],
+        )
+
+    def test_two_past_questions(self):
+        """
+        The questions index page may display multiple questions.
+        """
+        question1 = create_question(question_text="Past question 1.", days=-30)
+        question2 = create_question(question_text="Past question 2.", days=-5)
+        response = self.client.get(reverse('polls:index'))
+        self.assertQuerysetEqual(
+            response.context['latest_question_list'],
+            [question2, question1],
+        )
+
+
+class QuestionDetailViewTests(TestCase):
+    def test_future_question(self):
+        """
+        The detail view of a question with a pub_date in the future
+        returns a 404 not found.
+        """
+        future_question = create_question(question_text='Future question.', days=5)
+        url = reverse('polls:detail', args=(future_question.id,))
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 404)
+
+    def test_past_question(self):
+        """
+        The detail view of a question with a pub_date in the past
+        displays the question's text.
+        """
+        past_question = create_question(question_text='Past Question.', days=-5)
+        url = reverse('polls:detail', args=(past_question.id,))
+        response = self.client.get(url)
+        self.assertContains(response, past_question.question_text)*

djlearn/polls/views.py

@@ -2,6 +2,7 @@ from django.http import HttpResponseRedirect
 from django.shortcuts import get_object_or_404, render
 from django.urls import reverse
 from django.views import generic
+from django.utils import timezone
 
 from .models import Choice, Question
 
@@ -11,14 +12,23 @@ class IndexView(generic.ListView):
     context_object_name = 'latest_question_list'
 
     def get_queryset(self):
-        """Return the last five published questions."""
-        return Question.objects.order_by('-pub_date')[:5]
+        """
+        Return the last five published questions (not including those set to be
+        published in the future).
+        """
+        return Question.objects.filter(pub_date__lte=timezone.now()).order_by('-pub_date')[:5]
 
 
 class DetailView(generic.DetailView):
     model = Question
     template_name = 'polls/detail.html'
 
+    def get_queryset(self):
+        """
+        Excludes any questions that aren't published yet.
+        """
+        return Question.objects.filter(pub_date__lte=timezone.now())
+
 
 class ResultsView(generic.DetailView):
     model = Question