Monday, December 2, 2013

Basic tests in Apache JMeter part 1/2

Apache JMeter is a fine tool for different types of web tests – compatibility, performance, integration. This post is about recording, running and parametrizing basic tests.

First, start by running JMeter, you start with an empty Test Plan. Give it a name and add a Thread Group to the Test Plan (right click the Test Plan node and select Add/Threads/Thread Group).

Thread Group Thread Group represents a set of “users”. As you can see, you can modify the number of threads (users) and the ramp-up period. This is handy for testing your application for multiple concurrent clients.

Next step would be to set up an HTTP Proxy Server and a Recording Controller. These two will allow me to “record” the browser’s session instead of creating all requests manually.

Right-click the WorkBench node and add a Non-Test Element, HTTP Proxy Server. Add a Recording Controller to the Thread Group. In the HTTP Proxy’s settings tab, select the newly created Recording Controller as the target controller.

Target Controller Now start the proxy (Start button at the bottom of the settings tab), open up my web browser (any browser will do) and set the proxy to http://localhost:8080. If you are on Firefox, remember to set the proxy for each protocol (including HTTPS) (Tools/Options/Advanced/Network):

Firefox network setup

Now navigate to a web site you want to test. Each action is recorded under the recording controller.

To be able to replay the sequence of tests and see the results, add a listener to the thread group, the View Results Tree listener. Now you can click the Start button (or select Run/Start from the menu) and click your listener to see the replayed session. Use the Clear All button (Run/Clear All) to clear the listener.

Recorded session in the tree listener

In the next post we will create basic assertions and also modify the flow so that values returned from requests are used in consecutive posts.

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