Assertions in JMeter (Checkpoints)

Assertions (Checkpoints)

It is used to verify the response generated for sampler.

There are multiple types of assertions in JMeter, some of them are

•          Response Assertion
•          Duration Assertion
•          Size Assertion

Response Assertion

The response assertion control panel lets you add pattern strings to be compared against various fields of the response. Add the Response Assertion as a child tag for each HTTP Request Page.

Attributes of Response Assertion

Attribute	Description
Apply to	Main sample only - it applies to the main samples Sub-samples only - it applies to the sub-samples Main sample & sub - samples - it applies to both the main & sub Samples JMeter Variable - it applies to the contents of the named variable
Response Field to Test	Instructs JMeter which field of the Response to test
Ignore status	Instructs JMeter to set the status to success initially. When the Ignore Status checkbox is selected, the Response status is forced to successful before evaluating the Assertion.
Pattern Matching Rules	Indicates how the text being tested is checked against the pattern
Patterns to Test	A list of patterns to be tested. Each pattern is tested separately. If a pattern fails, then further patterns are not checked

Duration Assertion

The Duration Assertion tests that each response was received within a given amount of time. Any response that takes longer than the given number of milliseconds (specified by the user) is marked as a failed response.

Size Assertion

The Size Assertion tests that each response contains the right number of bytes in it. You can specify that the size be equal to, greater than, less than, or not equal to a given number of bytes.