HTTP Sampler with embedded resources, Mail Reader or samples generated by the Transaction Controller. This is for use with samplers that can generate sub-samples, e.g. Lets discuss in detail how to use and when to use this assertion. You can attach multiple assertions to any controller for additional flexibility.Ībove picture depicts about the response assertion. You can also choose whether the strings will be expected to match the entire response, or if the response is only expected to contain the pattern. The patterns can either be: a “string” for “Equals” or “Sub-string” clausesĪ “Perl5-style” Regular Expression for “Contains” or “Matches” clauses Response assertion is the most commonly used assertion which is used to check whether the response contain, match or equal a specified pattern. In detail, response may include text, headers, body, code or messages. Lets dive in to understand the usages of the assertions. It is very important keep in mind that, all assertions consumes some amount of your system CPU and Memory but not all assertions are the same but some consume way more CPU and Memory than the others. Failed assertions will cause all affected samples to fail.Īpache JMeter is built with wide variety of assertions that can be used validate the response. If the JMeter variable option is used, it is assumed to relate to the main sample, and any failure will be applied to the main sample only. More than one assertion can be added to the sampler, controller, thread group or test plan. If a sub-sampler fails and the main sample is successful, then the main sample will be set to failed status and an Assertion Result will be added. Scope of the assertions can be as follows: By default assertions can be applied only to main samples but JMeter also provides an options to include assertions only to sub-samples or both. To ensure that an Assertion is applied only to a particular sampler, add it as a child of the sampler. Now you may have many questions running in your mind like are we receiving expected or desired response from the server, how can we validate the received response through JMeter. In this case, Assertions come to your rescue !!Īssertions are used to perform additional checks on samplers, and are processed after every sampler in the same scope. Assertionsįrom the previous posts, we are all aware that how to send requests and get response from the target server. In case if you have missed the older articles click here. Lets discuss in detail about the advantages and disadvantages in using assertions. These elements plays a crucial role in validating samplers in our test scripts. In this article, I will talk you through about the next set of JMeter elements i.e Assertions.
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