JMeter Assertions Summary

JMeter is a robust performance testing tool capable of simulating user behavior and monitoring responses of web applications. Assertions, a highly practical feature in JMeter, verify the accuracy of server responses. They check either a part or the entirety of the server's response and mark the request as failed if it doesn't meet expectations. During testing, various types of assertions ensure that the application's responses are as anticipated.

Common Assertions

• Response Assertion: Compares response data with expected results, marking the request as successful if the response contains the expected outcome, or as failed otherwise.
• JSON Assertion: Validates if the JSON response meets expectations by checking the format, structure, keys, and values. Success is determined by matching expectations.
• Duration Assertion: Ensures server response is returned within a specified time frame, failing the request if it exceeds this duration.
• Size Assertion: Confirms that the size of the server response is within a defined range, marking the request as successful if it complies, or as failed if not.

Using Assertions

1. Add an HTTP Request.
2. Add an assertion element.
3. Select the type of assertion to use.
4. Configure the properties of the assertion, such as response code or response data.
5. Run the test and review the results.

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