Step29: unittest for blog app

Author: zmrenwu

Pipfile

@@ -16,4 +16,4 @@ elasticsearch = ">=2,<3"
 django-haystack = "*"
 
 [requires]
-python_version = "3.6"
+python_version = "3"

Pipfile.lock

@@ -149,6 +149,7 @@ tutorial 分支为项目的主分支，每一篇教程的代码都和历史提
 26. [开启 Django 博客的 RSS 功能](https://www.zmrenwu.com/courses/hellodjango-blog-tutorial/materials/84/)
 27. [Django 博客实现简单的全文搜索](https://www.zmrenwu.com/courses/hellodjango-blog-tutorial/materials/85/)
 28. [Django Haystack 全文检索与关键词高亮](https://www.zmrenwu.com/courses/hellodjango-blog-tutorial/materials/86/)
+29. [单元测试：测试 blog 应用](https://www.zmrenwu.com/courses/hellodjango-blog-tutorial/materials/87/)
 
 ## 公众号
 <p align="center">

README.md

@@ -0,0 +1,91 @@
+from django.apps import apps
+from django.contrib.auth.models import User
+from django.test import TestCase
+from django.urls import reverse
+
+from ..models import Category, Post, Tag
+from ..search_indexes import PostIndex
+
+
+class CategoryModelTestCase(TestCase):
+    def setUp(self):
+        self.cate = Category.objects.create(name="测试")
+
+    def test_str_representation(self):
+        self.assertEqual(self.cate.__str__(), self.cate.name)
+
+
+class TagModelTestCase(TestCase):
+    def setUp(self):
+        self.tag = Tag.objects.create(name="测试")
+
+    def test_str_representation(self):
+        self.assertEqual(self.tag.__str__(), self.tag.name)
+
+
+class PostModelTestCase(TestCase):
+    def setUp(self):
+        # 断开 haystack 的 signal，测试生成的文章无需生成索引
+        apps.get_app_config("haystack").signal_processor.teardown()
+        user = User.objects.create_superuser(
+            username="admin", email="[email protected]", password="admin"
+        )
+        cate = Category.objects.create(name="测试")
+        self.post = Post.objects.create(
+            title="测试标题", body="测试内容", category=cate, author=user,
+        )
+
+    def test_str_representation(self):
+        self.assertEqual(self.post.__str__(), self.post.title)
+
+    def test_auto_populate_modified_time(self):
+        self.assertIsNotNone(self.post.modified_time)
+
+        old_post_modified_time = self.post.modified_time
+        self.post.body = "新的测试内容"
+        self.post.save()
+        self.post.refresh_from_db()
+        self.assertTrue(self.post.modified_time > old_post_modified_time)
+
+    def test_auto_populate_excerpt(self):
+        self.assertIsNotNone(self.post.excerpt)
+        self.assertTrue(0 < len(self.post.excerpt) <= 54)
+
+    def test_get_absolute_url(self):
+        expected_url = reverse("blog:detail", kwargs={"pk": self.post.pk})
+        self.assertEqual(self.post.get_absolute_url(), expected_url)
+
+    def test_increase_views(self):
+        self.post.increase_views()
+        self.post.refresh_from_db()
+        self.assertEqual(self.post.views, 1)
+
+        self.post.increase_views()
+        self.post.refresh_from_db()
+        self.assertEqual(self.post.views, 2)
+
+
+class SearchIndexesTestCase(TestCase):
+    def setUp(self):
+        apps.get_app_config("haystack").signal_processor.teardown()
+        user = User.objects.create_superuser(
+            username="admin", email="[email protected]", password="admin"
+        )
+        cate = Category.objects.create(name="测试")
+        Post.objects.create(
+            title="测试标题", body="测试内容", category=cate, author=user,
+        )
+        another_cate = Category.objects.create(name="另一个测试")
+        Post.objects.create(
+            title="另一个测试标题", body="另一个测试内容", category=another_cate, author=user,
+        )
+        self.index_instance = PostIndex()
+
+    def test_get_model(self):
+        self.assertTrue(issubclass(self.index_instance.get_model(), Post))
+
+    def test_index_queryset(self):
+        expected_qs = Post.objects.all()
+        self.assertQuerysetEqual(
+            self.index_instance.index_queryset(), [repr(p) for p in expected_qs]
+        )

blog/tests.py

@@ -0,0 +1,6 @@
+from django.test import TestCase
+
+
+class SmokeTestCase(TestCase):
+    def test_smoke(self):
+        self.assertEqual(1 + 1, 2)