Defining and Calling functions in loadrunner Vugen

This resource is a tutorial on how can you define modular code blocks in your loadrunner script. This can have multiple uses like

• Writing common code blocks into functions which can be easily mananged
• Placing file writing code into a function, which can be called throughout the test script

In following example we are calling a function through loadrunner script, this function calls and loads SPEForums.com page via function.
Follow the below tutorial to understand how the functions work in loadrunner.

1. Create a new file (Sample.h) in extra files (Solution Explorer) as shown in below figure

2. Add following code in Sample.h


3. To make loadrunner recognise the function written in point 2 , please add following lines in globals.h file




4. Call the newly created function from Action as shown below


Refer Screenshot below


Note that the 'test' variable has no significance in the example. It is just shown to demonstrate variable passing.

Example 2: Creating a file writing function in loadrunner

It is recommended to go through example 1 to understand how to call functions before going through this example.

Step 1: Define a function in extra file

Here we have created a file "WriteToFile.h" and included below code in the file

Code:

writeFile(char* param1, char* param2)
{
    int fp;
   
    //Pre-requisite :: Create folder 'trail' in c drive

          fp=fopen("c:\\trail\\example1.txt","a+");   
        fputs(param1,fp);
        fputs(":",fp);
        fputs(param2,fp);
        fputs("\n",fp);
        fclose(fp);


    return 0;   
}

Step 2: Add an entry for "WriteToFile.h" in globals.h file

Step 3: Call this function from actions using this code

Code:

Action()
{

char * test1;
char * test2;
   
    test1="SPEForums";
    test2="is Best";
    //Call Function
   
    writeFile(test1,test2);   

    return 0;
}

Output of example 2 -