How to use [jmeter regular expression extractor] to solve the problem of returning the value as a parameter

Table of Contents

Foreword

Add regular expression extractor step:

Description:

Finally a little trick:

Conclusion

Foreword

When we use jmeter for interface testing, we often encounter that the return value of the previous interface will be used as the parameter of the next interface to request.At this time, you need to use jmeter's regular expression extractor.

Add regular expressionExtractor steps:

"Right click on the interface to add the extractor"——add——post processors——regular expression extractor, the specific operation is as follows:

After adding, the configuration is as follows:

Then the next interface call:

Description:

(1) Reference name: The name of the parameter to be referenced in the next request, such as filling in cid, you can use ${cid} to reference it.

(2) Regular expression:

(): The enclosed part is to be extracted.

.: Matches any string.

+: One or more times.

?: Don't be too greedy, stop after the first match is found.

(3) Template: refer to it with $$. If there are multiple regular expressions in the regular expression, it can be $2$$3$, etc., which means the parsed value is given to the title.For example: $1$ represents the first value parsed

(4) Matching numbers: 0 means random value, 1 means all values, usually fill in 0

(5) Default value: If the parameter does not get a value, it will default to a value and let it take it.

One last tip:

Results can be viewed in the result tree and the Debug PostProcessor during debugging to help analyze the results.

Conclusion

This post ends here. Finally, I hope that friends who read this post can gain something.If you want to take testing as a long-term career development goal, you need to keep learning and make yourself competitive. No matter how many years you work now, as long as you take action, you will already have an advantage.I wish everyone a promotion and salary increase in 2022. Those who have not joined the company will get the offer of their favorite company as soon as possible, and everything will go smoothly.

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