How do I simulate an AJAX request with Flask test client?

Question

Testing Flask applications is done with:

# main.py
from flask import Flask, request

app = flask.Flask(__name__)

@app.route('/')
def index():
    s = 'Hello world!', 'AJAX Request: {0}'.format(request.is_xhr)
    print s
    return s

if __name__ == '__main__':
    app.run()

Then here is my test script:

# test_script.py
import main
import unittest

class Case(unittest.TestCase):
    def test_index():
        tester = app.test_client()
        rv = tester.get('/')
        assert 'Hello world!' in rv.data

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

In the test output, I'll get:

Hello world! AJAX Request: False

Question

How do I test my app with AJAX requests?

Answer 1

Try this:-

def test_index():
    tester = app.test_client()
    response = tester.get('/', headers=[('X-Requested-With', 'XMLHttpRequest')])
    assert 'Hello world!' in response.data