Now we will learn what are the Elements of JMeter and why they are there in JMeter.
Elements of JMeter:
Elements of JMeter:
v Test Plan
v Thread Group
v Controllers & Samplers
v Listeners
v Timers
v Assertions
v Configuration tool
v Pre-processor elements
v Post-processor elements
v Test Plan describes a series of steps JMeter will execute when run.
v Thread Group elements are beginning points of any Test Plan. Everything must be under Thread Group.
v Types of Controllers:-
Ø Samplers
Ø Logical Controllers
Ø Samplers tell JMeter to send a request to a server and wait for response.
e.g. HTTP Request sampler.
Ø Logical Controllers let you customize the logic that JMeter uses to decide when to send requests.
v Listeners provide access to the information JMeter gathers about the Test cases while JMeter runs.
Ø Graph Result Listener plots the response time on graph.
Ø View Result Tree shows details of sampler request and response.
v Timers are useful to specify a delay between requests send (to thread group).
v Assertions allow you to assert facts about responses received from the server being tested. Using Assertion, you can essentially test that the application is giving result that we expect.
v Configuration element works same as samplers but does not send request. It can modify/add requests.
v Pre-processor executes some action prior to a sampler request being made.
v Post-processor is not often used to process the response data, often to extract values from it.
I hope the above information of the elements is quite enough to start with JMeter.
Now we will get into each element, in depth, later.
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