Fair enough - perhaps 'expensive' was the wrong wording... "Not free" is a better wording...
The more assertions you use in each response, the higher the overhead will be on processing the response - and the slower your JMeter throughput will be. Therefore, use them _efficiently_ to detect whether your responses are proper for your test conditions. They are like 'seasonings' - not too much, or you'll overpower your test. But too little will make your test ineffective and unable to reveal what you think it is revealing. -- Robin D. Wilson Sr. Director of Web Development KingsIsle Entertainment, Inc. VOICE: 512-777-1861 http://www.kingsisle.com -----Original Message----- From: sebb [mailto:seb...@gmail.com] Sent: Thursday, October 09, 2014 7:56 AM To: JMeter Users List Subject: Re: what is the use of assertion On 9 October 2014 13:44, Robin D. Wilson <rwils...@gmail.com> wrote: > Here's a real-life example: > > In our web application, many of our pages return a "200" response code, but > the actual page returned is an error message to the end user. In our system, > all of our "end user error messages" follow a consistent pattern in the HTML > of the returned page. So we have a negative assertion that checks that these > patterns don't exist in any returned page - so we know that the system did > not return an error during the JMeter run. > > Likewise, on most pages we have an assertion for some HTML pattern that will > only be present if the correct successful page is returned. > > BUT, assertions are relatively expensive in JMeter - meaning they add > a lot of test of processing to the script, and slow down throughput of > JMeter. (They use regular expressions to parse the returned data fro > the server, which takes a lot of compute power.) So use them efficiently... There are many different Assertions; some are more expensive than others. The Response Assertion only uses regexes for 'Contains' and 'Matches' If 'Substring' can be used, it will be cheaper. > -- > Robin D. Wilson > VOICE: 512-777-1861 > > > > On Oct 9, 2014, at 4:26 AM, ZK <stevesenio...@gmail.com> wrote: > > Hi, > Assertions let you check the response you receive are the correct > expected responses > > See here: > http://blazemeter.com/blog/how-use-jmeter-assertions-3-easy-steps > > ZK > > > > -- > View this message in context: > http://jmeter.512774.n5.nabble.com/what-is-the-use-of-assertion-tp5721 > 177p5721178.html Sent from the JMeter - User mailing list archive at > Nabble.com. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org > For additional commands, e-mail: user-h...@jmeter.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org > For additional commands, e-mail: user-h...@jmeter.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org For additional commands, e-mail: user-h...@jmeter.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org For additional commands, e-mail: user-h...@jmeter.apache.org
