First, this isn't really a "limitation" of JMeter, it is an artifact of the way
web sites work. Keep in mind, JMeter is designed to
test the 'server' part of the web system, but web systems include the 'browser'
in the application logic (often times incorporating
a lot of logic in the JavaScript code that runs in the browser, or in other
coding systems such as Flash and Silverlight). You could
call that a 'limitation' of JMeter, but that would be like saying that a
chainsaw is limited because it can't be used as a good
hammer.
There are a couple of ways this is measured, depending on the site in question.
If it is coming from the server, it is probably
looking at a header in the request to figure out if you have JavaScript
enabled. Add an "HTTP Header Manager" element to your test
plan, and set a User-Agent value...
We use the following User-Agent value:
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64;
Trident/5.0)
This essentially tells the server that you are making requests with the IE9.0
browser (which supports JavaScript by default). (NOTE:
we use this because it is still our most popular browser (actually, that's not
quite true - it is the most common version of the
most popular browser 'type' (IE)) - for users hitting our sites.)
But if you have a different user population, you might prefer to use Chrome or
Firefox or Safari as your 'standard test' User-Agent.
You can look up their User-Agent strings here:
http://www.useragentstring.com/pages/useragentstring.php
If the HTTP Header Manager + User-Agent value configuration doesn't work, you
will need to figure out how the server is determining
that the browser supports JavaScript, and mimic that with your test. It is
usually easier to setup the 'HTTP Proxy Server', and just
collect a session from your browser than it is to try to figure it out manually
though.
To setup the proxy and capture a session:
1) Create a new Test Plan.
2) Right-Click on "Workbench" and select:
Add->Non-Test Elements->HTTP Proxy Server
3) Make sure "Capture HTTP Headers" is checked
4) Click "Start" on the HTTP Proxy Server configuration page (at the bottom of
the page)
5) In your browser, set your Proxy Server address to "localhost", and use the
port specified in your HTTP Proxy Server configuration
(default is 8080).
6) Visit your site, and perform some functions you want in your test.
These should start to record your requests in the test plan, below the
workbench section. You can click on one of the requests and
see what the "HTTP Header Manager" looks like, and use that as your default
HTTP Header Manager for your tests. You can also see
what sort of interactions are taking place between the browser and the server -
some of which may be under-the-covers (hidden from
the user) and allowing the server to figure out whether the site supports
JavaScript.
--
Robin D. Wilson
Sr. Director of Web Development
KingsIsle Entertainment, Inc.
VOICE: 512-777-1861
http://www.kingsisle.com
-----Original Message-----
From: nmq [mailto:nmq0...@gmail.com]
Sent: Tuesday, June 11, 2013 2:41 PM
To: JMeter Users List
Subject: Login failed - javascript
Hi everyone
I have run into an issue running my basic login script for the AUT. It was
working fine till we got a new build this week.
Now, I have been a functional tester my whole career. My company wanted me to
do some performance test for them and I figured why
the heck not. I'll learn along the way, so basically I'm a newbie in this area.
Since JMeter is an open-source (translated: free of cost) tool that is
supposedly powerful, we decided to use it (stupidly, without
finding out its limitations). I've invested quite some time in learning the
tool so I'm not ready to give up or switch to another.
I'm also not a programmer and don't have much info on java or javascript.
Anyways, getting back to the point..... I looked at the response in ResultsTree
in HTML format and this is the message I'm getting
on the Login
page:
"This website requires JavaScript
Please activate JavaScript and press F5"
HELP!!
Regards
Sam
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