測試WEB服務
Flask測試客戶端還可用於測試REST式WEB服務。
tests/test_api.py:使用Flask測試客戶端測試REST式API
import unittest
import json
import re
from base64 import b64encode
from app import create_app, db
from app.models import User, Role, Post, Comment
class APITestCase(unittest.TestCase):
def setUp(self):
self.app = create_app('testing')
self.app_context = self.app.app_context()
self.app_context.push()
db.create_all()
Role.insert_rows()
self.client = self.app.test_client()
def tearDown(self):
db.session.remove()
db.drop_all()
self.app_context.pop()
@staticmethod
def get_api_headers(username, password):
return {
'Authorization': 'Basic ' + b64encode((username + ":" + password).encode('utf-8')).decode('utf-8'),
'Accept': 'application/json',
'Content-Type': 'application/json'
}
def test_404(self):
response = self.client.get('/wrong/url', headers=self.get_api_headers('email', 'password'))
self.assertEqual(response.status_code, 404)
json_response = json.loads(response.get_data(as_text=True))
self.assertEqual(json_response['error'], 'not found')
def test_no_auth(self):
response = self.client.get('/api/v1/posts/', content_type='application/json')
self.assertEqual(response.status_code, 401)
def test_bad_auth(self):
# add a user
r = Role.query.filter_by(name='User').first()
self.assertIsNotNone(r)
u = User(email='[email protected]', password='cat', confirmed=True, role=r)
db.session.add(u)
db.session.commit()
# authenticated with the bad password
response = self.client.get('/api/v1/posts/', headers=self.get_api_headers(u.email, 'dog'))
self.assertEqual(response.status_code, 401)
def test_token_auth(self):
# add a user
r = Role.query.filter_by(name='User').first()
self.assertIsNotNone(r)
u = User(email='[email protected]', password='cat', confirmed=True, role=r)
db.session.add(u)
db.session.commit()
# issue a request with a bad token
response = self.client.get('/api/v1/posts/', headers=self.get_api_headers('bad-token', ''))
self.assertEqual(response.status_code, 401)
# get a token
response = self.client.post('/api/v1/token', headers=self.get_api_headers(u.email, 'cat'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertIsNotNone(json_response.get('token'))
token = json_response['token']
# request with token
response = self.client.get('/api/v1/posts/', headers=self.get_api_headers(token, ''))
self.assertEqual(response.status_code, 200)
# get a token with a token
response = self.client.post('/api/v1/token', headers=self.get_api_headers(token, ''))
self.assertEqual(response.status_code, 401)
def test_anonymous(self):
response = self.client.get('/api/v1/posts/', headers=self.get_api_headers('', ''))
self.assertEqual(response.status_code, 401)
def test_unconfirmed_account(self):
# add an unconfirmed user
r = Role.query.filter_by(name='User').first()
self.assertIsNotNone(r)
u = User(email='[email protected]', password='123', confirmed=False, role=r)
db.session.add(u)
db.session.commit()
# get list of posts with unconfirmed account
response = self.client.get('/api/v1/posts/', headers=self.get_api_headers(u.email, '123'))
self.assertTrue(response.status_code, 403)
def test_posts(self):
# add user
r = Role.query.filter_by(name='User').first()
self.assertIsNotNone(r)
u = User(email='[email protected]', password='123', confirmed=True, role=r)
db.session.add(u)
db.session.commit()
# write an empty post
response = self.client.post('/api/v1/posts/', headers=self.get_api_headers(u.email, '123'),
data=json.dumps({'body': ''}))
self.assertEqual(response.status_code, 400)
# write valid post
response = self.client.post('/api/v1/posts/', headers=self.get_api_headers(u.email, '123'),
data=json.dumps({'body': 'a post from Bob.'}))
self.assertEqual(response.status_code, 201)
url = response.headers.get('Location')
self.assertIsNotNone(url)
# get the new post
response = self.client.get(url, headers=self.get_api_headers(u.email, '123'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertIsNotNone(json_response)
self.assertEqual('http://localhost' + json_response['self_url'], url)
self.assertEqual(json_response['body'], 'a post from Bob.')
self.assertEqual(json_response['body_html'], '<p>a post from Bob.</p>')
json_post = json_response
# get the post from the user
response = self.client.get('/api/v1/users/{}/posts/'.format(u.id),
headers=self.get_api_headers(u.email, '123'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertIsNotNone(json_response.get('posts'))
self.assertEqual(json_response.get('count', 0), 1)
self.assertEqual(json_response['posts'][0], json_post)
# get the post from the user as a follower
response = self.client.get('/api/v1/users/{}/followed/posts/'.format(u.id),
headers=self.get_api_headers(u.email, '123'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertIsNotNone(json_response.get('posts'))
self.assertEqual(json_response.get('count', 0), 1)
self.assertEqual(json_response['posts'][0], json_post)
# edit post
response = self.client.put(url, headers=self.get_api_headers(u.email, '123'),
data=json.dumps({'body': 'updated body'}))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertEqual('http://localhost' + json_response['self_url'], url)
self.assertEqual(json_response['body'], 'updated body')
self.assertEqual(json_response['body_html'], '<p>updated body</p>')
測試API時使用的setUp()和tearDown()方法與測試普通應用所用的一樣,不過API不使用cookie,無需配置cookie支持。get_api_headers()是一個輔助方法,返回多數API請求要求發送的通用首部,包括身份驗證憑據和MIME類型相關的首部。
請求主體中發送的數據(即data參數的值)要使用json.dumps()進行編碼,因爲Flask測試客戶端不會自動編碼,因爲Flask測試客戶端不會自動編碼JSON格式數據。類似的返回的響應主體格式也是JSON,處理之前必須使用json.loads()方法解碼。
當然了,還有一種簡便方法,使用json可直接傳遞json字典,對響應對象調用get_json()可以直接獲取解析後的字典。比如下面的測試,在對Comment新增時就用到了:
def test_comments(self):
# add two users
r = Role.query.filter_by(name='User').first()
self.assertIsNotNone(r)
u1 = User(email='[email protected]', username='alice', password='alice', confirmed=True, role=r)
u2 = User(email='[email protected]', username='bob', password='bob', confirmed=True, role=r)
db.session.add_all([u1, u2])
db.session.commit()
# add a post
post = Post(body='body of the post', author=u1)
db.session.add(post)
db.session.commit()
# write a comment
response = self.client.post('/api/v1/posts/{}/comments/'.format(u1.id),
headers=self.get_api_headers(u2.email, 'bob'),
json={'body': 'Good [post](http://example.com)!'})
self.assertEqual(response.status_code, 201)
# json_response = json.loads(response.get_data(as_text=True))
json_response = response.get_json()
url = response.headers.get('Location')
self.assertIsNotNone(url)
self.assertEqual(json_response['body'], 'Good [post](http://example.com)!')
self.assertEqual(re.sub('<.*?>', '', json_response['body_html']), 'Good post!')
# get the new comment
response = self.client.get(url, headers=self.get_api_headers(u2.email, 'bob'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertEqual('http://localhost' + json_response['self_url'], url)
self.assertEqual(json_response['body'], 'Good [post](http://example.com)!')
# add another comment
comment = Comment(body='Thanks!', author=u1, post=post)
db.session.add(comment)
db.session.commit()
# get the two comments form the post
response = self.client.get('/api/v1/posts/{}/comments/'.format(post.id),
headers=self.get_api_headers(u1.email, 'alice'))
self.assertEqual(response.status_code, 200)
json_response = json.loads(response.get_data(as_text=True))
self.assertIsNotNone(json_response.get('comments'))
self.assertEqual(json_response.get('total', 0), 2)