Requests Is A Popular Library To Query An HTTP Service

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Requests is a popular library to query an HTTP service, and is widely used in the Python community.

Let’s say you want to load test the Elastic Search root page that’s running on your local host.

Write a test case like this one and save it in an example.py file:

from loads.case import TestCase

class TestWebSite(TestCase):

def test_es(self): res = self.session.get('http://localhost:9200') self.assertEqual(res.status_code, 200)
The TestCase class provided by Loads has a session attribute you can use to interact with an HTTP server. It’s a Session instance from Requests.

Now run loads-runner against it:

$ bin/loads-runner example.TestWebSite.test_es
[======================================================================] 100%

Hits: 1
Started: 2013-06-14 12:15:42.860586
Duration: 0.03 seconds
Approximate Average RPS: 39
Average request time: 0.01s
Opened web sockets: 0
Bytes received via web sockets : 0

Success: 1
Errors: 0
Failures: 0
This will execute your test just once - so you can control that your test works as expected.

Now, try to run it using 100 virtual users (-u), each of them running the test 10 times (–hits):

$ bin/loads-runner example.TestWebSite.test_es -u 100 --hits 10
[======================================================================] 100%
Hits: 1000
Started: 2013-06-14 12:15:06.375365
Duration: 2.02 seconds
Approximate Average RPS: 496
Average request time: 0.04s
Opened web sockets: 0
Bytes received via web sockets : 0

Success: 1000
Errors: 0
Failures: 0r

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