But follow the same conventions throughout your test suite to avoid confusion. You have to name the column either in the test data file or here. Relative or absolute path of the test data file. The following are the fields in CSV Data Set Config and its purpose. Now let us deep-dive into CSV Data Set Config. When you run your load test, usually the Loop Count should be infinite, so that the test plan will make use of all the test data from the file. If you expand each iteration response in the View Results Tree, you can see all your test data has been sent to the server. Loop Count) to 4 and execute the test plan. Smoke Test Run your test with multiple iterationsĬlick on Thread Group and increase the number of iterations (i.e. To add CSV Data Set Config, right-click on the appropriate element (usually it would be Test Plan or Thread Group) > Add > Config Element > CSV Data Set Config. The CSV Data Set Config element is way much easier than the functions. Apart from the config element, you can also leverage the functions such as _StringFromFile and _CSVRead. JMeter has a built-in config element to read the values from the files.
#Apache jmeter loop count layman how to
Now, let us see how to adopt parameterization in JMeter.
Solutions like Locust or k6 might leverage third party library for the advanced usage of reading values from CSV file. The behaviour could be changed based on which tool you are using for the load testing. txt or other valid formats.ĭifferent tools adopt different strategy, but on the high level, you store the data from a file and the tool will read it for you in a sequential order by default. The typical format of a data file is comma separated value. To send different or unique data, usually you store the test data in a flat file and associate them using the variable name. It is critical to use unique sets of data for any form of performance testing to measure the performance like a real world scenario. If you keep reusing the test data in a load test, data will be read from the cache layer instead from the disk.You may not be able to find the potential bottleneck(s) in your application or infrastructure. In the real world, each user is unique you cannot reuse the data while running the load test in a non-production environment. Data Parameterization helps to test your application under test using multiple sets of data.
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