I am new to Jmeter. I need to write an assertion to my http request. The HTTP request returns all the tags available as an array in JSON response and I need to assert that my tag, which I have stored as a variable, is part of the response

I have tried using ${tagName}

as well as vars.get("tagName")

for response assertion, but both are doing the string match rather than matching the variable value.I am sure there is an easy fix to this. Please help.

2 Answers 2


In case of "normal" Response Assertion as per How to Use JMeter Assertions in Three Easy Steps article:

The most commonly used assertion is the Response Assertion, which checks whether a response text/body/code/message/header contains, matches, or equals a specified pattern.

The Pattern can be either be:

  • a “string” for “Equals” or “Substring” clauses
  • a “Perl5-style” Regular Expression for “Contains” or “Matches” clauses

So the configuration you're looking for is "Substring" pattern matching rule and should be something like:

enter image description here

  • Thanks for responding. I was using 'Contains' matching rule and getting error. However using substring matching rule also gives the same error:Assertion failure message:Test failed: text expected to contain /${tagName}/ Oct 6, 2020 at 1:42
  • It means that your tagName variable doesn't have a value so double check the way you're creating/assigning it. You can see all JMeter Variables with their respective values using Debug Sampler and View Results Tree listener combination
    – Dmitri T
    Oct 6, 2020 at 4:55

Have you tried using the JSON Assertion item, rather than the Response Assertion?

You can then assert that the JSON path in the response exists and is set to a value, which can be a JMeter variable.

Your JSON path in it might be something like $.tagName (or whatever the field is called in the response) and the expected value might be ${tagName} (your variable).

  • Sadly, the response doesn't have a key value pair structure, just an array of values.. {"results":["AAbb7","AFC_s2s_CRUD_NB_T4","Aztest1","Aztest2","Aztest3","CLOUD_RSSERVER2012.SIMULATION00001","Cloud_BA:ACTIVE.1","Cloud_BA:CONC.1","Cloud_BA:LEVEL.1","Cloud_BA:PHASE.1","Cloud_BA:TEMP.1","Cloud_Cloud_QA-SECD-HIST-FN.Simulation00001","Cloud_Cloud_QA-SECD-HIST-FN.Simulation00002","Cloud_Cloud_QA-SECD-HIST-FN.Simulation00003"]} Oct 5, 2020 at 7:57

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