load runner recording with virtual user generator chapter 6

8/14/2019 Load Runner Recording With Virtual User Generator Chapter 6

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Developing Vuser Scripts


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Developing Vuser Scripts

1. You begin the process of developing a Vuser script byrecording a basic script.

2. You enhance the basic script by adding control-flow

structures, and by inserting transactions andrendezvous points into the script.

3. You then configure the run-time settings. The run-timesettings include iteration, log, and timing information,and define how the Vuser will behave when it executesthe Vuser script.

4. To verify that the script runs correctly, you run it instand-alone mode.

5. When your script runs correctly, you incorporate it into aLoadRunner scenario.


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VuGen

The Vuser Script Generator, also known as

VuGen, enables you to develop Vuser scripts for

a variety of application types and communication

protocols. VuGen not only records Vuser scripts, but also

runs them. Running scripts from VuGen is useful

when debugging. It enables you to emulate how

a Vuser script will run when executed as part of

a scenario.


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Recording Vuser Scripts

When you record a Vuser script, VuGen

generates various functions that define the

actions that you perform during the recording

session. VuGen inserts these functions into theVuGen editor to create a basic Vuser script.

You use VuGen to develop a Vuser script by

recording a user performing typical business

processes on a client application. VuGen

creates the script by recording the activity

between the client and the server.


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Transaction & Rendezvous

functions

lr_start_transaction: Marks the

beginning of a transaction.

lr_end_transaction: Marks the end of a

transaction.

lr_rendezvous: Sets a rendezvous point.


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Each Vuser script that you create contains atleast three sections: vuser_init, one or moreActions, and vuser_end.

During recording, you can select the section ofthe script into which VuGen will insert therecorded functions.

In general, you record a login to a server into the

vuser_initsection, client activity into theActionssections, and the logoff procedure into thevuser_endsection.


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DB Vuser scripts


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Recording Web Vuser

Step 1: File > New> eBusiness (http/html)

Step 2: Click on Record button

Step 3: Enter URL and press OK Step 4: The web pages opens, start

browsing the web page and perform

actions Step 5: Stop recording

Step 6: Run to debug the script.


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Insert Transaction Points

Step 7: Insert Transaction Start and

Transaction end points

Step 8: Insert Rendezvous point

Step 9: Run to debug script.

Step 10: Insert Comments for reference.


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Using C Functions

VuGen generates Vuser scripts in C. Allstandard ANSI C conventions apply to thescripts, including control flow and syntax.

You can add comments and conditionalstatements to the script just as you do in other Cprograms. You declare and define variablesusing ANSI C conventions.

There are many limitations for adding functionsin Vuser Script.

Many C functions are not supported by VuserScript.


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Using C Functions

However, since the interpreter that is used

to run Vuser scripts does not support any

Microsoft extensions to ANSI C, you

cannot use Microsofts include files.

It is better to use VuGen for recording

Vuser Scripts compared to manual coding

in C as there are many limitations inadding functions.


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Questions?

load runner recording with virtual user generator chapter 6

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