Add unit test for like feature

Author: killpanda

tests/test_like.py

@@ -0,0 +1,59 @@
+# coding: utf-8
+from __future__ import absolute_import
+
+from flask import url_for
+from flask_login import current_user
+import pytest
+
+from firefly.models.user import User
+from firefly.models.topic import Category, Post
+
+
+@pytest.mark.usefixtures('client_class')
+class TestLike:
+
+    users = []
+
+    def setup(self):
+        c = Category.objects.create(
+            name='python', description='描述', _slug='python-slug'
+        )
+        Post.objects.create(
+            title='标题test', content='内容test', category=c
+        )
+
+        self.users = []
+        for x in range(3):
+            self.users.append(
+                User.create_user(
+                    username='user' + str(x),
+                    password='password123',
+                    email='user' + str(x) + '@firefly.dev'
+                )
+            )
+
+    def login(self, email):
+        form = {
+            'email': email,
+            'password': 'password123'
+        }
+        self.client.post(
+            url_for('home.login'), data=form,
+            follow_redirects=True
+        )
+        assert current_user.is_authenticated()
+
+    def test_like(self):
+        post = Post.objects.first()
+        assert len(post.likes) == 0
+
+        for user in self.users:
+            self.login(user.email)
+            url = url_for('api.like', id=post.id)
+            rv = self.client.put(url)
+            assert rv.status_code == 201
+        assert len(post.likes) == len(self.users)
+
+        rv = self.client.delete(url)
+        assert rv.status_code == 201
+        assert len(post.likes) == 2