We will create a Test Plan in order to demonstrate how we can configure the Test Plan to include functional testing capabilities. For this article, we will limit ourselves to selected functional aspects of the page that we seek to verify or assert. In fact, the application you want to test may even reside locally, with your own machine acting as the "localhost" server for your web application. It is unnecessary to select a specific workload time to perform a functional test. With some knowledge of HTML tags, you can test and verify any elements as you would expect them in the browser. However, to compensate for these shortcomings, JMeter allows the tester to create assertions based on the tags and text of the page as the HTML file is received by the client. This makes it difficult to test the GUI of an application under testing. In fact, it may not be able to render large HTML files at all. Although, by default that embedded resources can be downloaded, rendering these in the Listener/ View Results Tree may not yield a 100% browser-like rendering. JavaScripts, applets, and many more.) and it does not render the page for viewing. It tests on the protocol layer, not the client layer (i.e. JMeter does not have a built-in browser, unlike many functional-test tools. Preparing for Functional Testing by Using JMETER For weekly releases regression tests can be performed when functional testing is over for the changes. For the release taking months to complete, regression tests must be incorporated in the daily test cycle.
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Regression testing is usually performed after verification of changes or new functionality. Regression test should be the part of release cycle and must be considered in test estimation. When this test is done tester should verify if the existing functionality is working as expected and new changes have not introduced any defect in functionality that was working before this change. The intention of this test is to verify the changes made in the existing functionality and newly added functionality. Testers perform functional testing when new build is available for verification. Verifying that the bugs are fixed and the newly added features have not created in problem in previous working version of software. This test can be performed on a new build when there is significant change in original functionality or even a single bug fix. Test cases are re-executed in order to check whether previous functionality of application is working fine and new changes have not introduced any new bugs. Regression means retesting the unchanged parts of the application.