python – Start and Drop Bank in flask test

Question:

I'm doing an api test, which I pass a json it validates if everything is ok:

my base class:

# -*- coding: utf-8 -*-
# base.py

import os
import unittest
from app import initialize
from mock import mock
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from app import database
os.environ = {
    my_variavels:
}

test_app = Flask(__name__)
test_app.config.from_object('app.config.TestingConfig')
database.AppRepository.db = SQLAlchemy(test_app)

class TestCase(unittest.TestCase):
    mock = mock
    user = initialize.web_app.test_client()

I believe that in this base file, it should have the teardown, Setup etc functions..

 json_gardener = {"id": "1",
                    "name": "Jamme"}

And I have the following function that makes the post in this case:

def test_post_gardener(self):
             response = self.user.post('/gardeners', headers={'VALIDATION': 'XXXX'}, data=self.json_gardener)
            self.assertEqual(response.status_code, 201)

So far, everything is ok, it works perfectly, but when I run it the second time, obviously it will show that the id already exists in the bank and it will give an error.

My question is, is there a way to upload a database to test and when it finishes running it dismount?

Answer:

According to Flask's own documentation there is a tempfile class that can be used for this as a database instance in the test class.

import os
import flaskr
import unittest
import tempfile

class FlaskrTestCase(unittest.TestCase):

    def setUp(self):
        self.db_fd, flaskr.app.config['DATABASE'] = tempfile.mkstemp()
        flaskr.app.config['TESTING'] = True
        self.app = flaskr.app.test_client()
        with flaskr.app.app_context():
            flaskr.init_db()

    def tearDown(self):
        os.close(self.db_fd)
        os.unlink(flaskr.app.config['DATABASE'])

    def test_empty_db(self):
        rv = self.app.get('/')
        assert b'No entries here so far' in rv.data

    def login(self, username, password):
    return self.app.post('/login', data=dict(
        username=username,
        password=password
    ), follow_redirects=True)

    def logout(self):
        return self.app.get('/logout', follow_redirects=True)

    def test_login_logout(self):
        rv = self.login('admin', 'default')
        assert b'You were logged in' in rv.data
        rv = self.logout()
        assert b'You were logged out' in rv.data
        rv = self.login('adminx', 'default')
        assert b'Invalid username' in rv.data
        rv = self.login('admin', 'defaultx')
        assert b'Invalid password' in rv.data

if __name__ == '__main__':
    unittest.main()

Source: http://flask.pocoo.org/docs/0.12/testing/

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