Re: what is the use of assertion
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-tp5721177p5721178.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
Re: what is the use of assertion
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... -- 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-tp5721177p5721178.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
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-tp5721177p5721178.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
RE: what is the use of assertion
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
Re: what is the use of assertion
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 are like 'seasonings' - not too much, or you'll overpower your test. In my experience , much easier to get more JMeter machines and to add assertions into the test that give me a degree of confidence that the test did indeed do what it was supposed to. Much harder to figure out why only 995 users exist in the DB when my test shows 1000 created successfully. I consider these essential ingredients rather than seasonings (though some assertions might be redundant and not needed) On Thu, Oct 9, 2014 at 5:44 AM, 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... -- 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-tp5721177p5721178.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
