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I had a situation where I needed to find a specific record within a list. The web page had a list of 300 orders, and I had to find an order with a matching status of “NONE” based on some text displayed. The first thing I had to do was capture all the statuses and put them into an array, and then find a match.
To get the statuses into an array, I used the ORD=ALL argument with the web_reg_save_param function:

// Get all 300 orders displayed on this HTML page
web_reg_save_param(“statusA”,
“LB=&orderStatus=”,
Read Entire Entry

While it isn’t the most popular protocol out there, RTE (terminal emulation) continues to serve a need for those testing against “green screen” apps, AS400’s, etc…There are times where you may be waiting on a particular string of text to show up on a screen. You may want to continue polling until the text is there. The script below gives you one idea of how to do this. Note that the X/Y coordinates and field length will be different based on your screen and what you are looking for.

int rc, i;
char match[80];

// Grab some tex Read Entire Entry

At the beginning of your script where you declare variables, seed time() with the srand() function:
char buffer[80];
int TotalNum, RandNum, i;
srand(time(NULL));
Here is how you might use this. Let’s say you need to use a random selection from a web page. This might be a different check box or drop down selection and you want it to be random each time:
//First grab the total count of items to choose from using ORD=ALL

web_reg_save_param(“pCapture”, “LB=something”,
“RB=something else”, “Ord=All”, LAST);

web_submit_data(“BLINGBLING”, Read Entire Entry

When using the lr_save_datetime function, you may want to advance or decrement more than one day, you have to multiply by the number of days.
Example code:

// Display Current Date Only
lr_save_datetime(“%m/%d/%Y”,DATE_NOW,”Currdate”);
lr_output_message(“Current Date: %s”,lr_eval_string(“{Currdate}”));

// Subtract 30 days from current date
lr_save_datetime(“%m/%d/%Y”, DATE_NOW – (ONE_DAY*30), “Startdate”);
lr_output_message(“Previous 30 Days: %s”,lr_eval_string(“{Startdate}”));

// Advance 30 days from curre Read Entire Entry

In this example we are running tasklist.exe in windows to check the existence of a process by looking at the first 13 characters in the file.

checkprocess()
{
char command[1024];
int i, total = 0;
char buffer[12], ch;
char *filename = lr_eval_string(“C:\\tasklist_{pTime}.txt”);
long file_stream;

//Run a system command to open up a DOS prompt and tasklist
//Save it to a file

sprintf(command, “tasklist /FI \”IMAGENAME eq MobileEngine.exe\”
/FI \”STATUS eq running\” /FO TABLE /NH > %s”, filename);
sys Read Entire Entry

I was asked to post a simple strcmp example for use in Vugen scripting. Here it is:
if (strcmp(lr_eval_string(“{pParameter}”), “”) == 0)
{
lr_error_message(“No parameter value captured. Ending iteration.”);
return 0;
}
else{
lr_output_message(“The parameter value is %s”,
lr_eval_string(“{pParameter}”));
};
Anyone care to elaborate in the comments section as to what this code is doing? Read Entire Entry

Here is an easy way to replace anything with anything in a captured string in your LoadRunner Vugen script. It is a function called “string_replace”. Place this in the top of your action section, right after the include but before the main section begins:

char *string_replace(char *input_string,
char *substring_to_be_replaced,
char *substitution_string)

{

// strstr function declaration
char *strstr(const char *s1, const char *s2);

// newstring variable the new string to be returned
// increase the buffer size if needed. Read Entire Entry

Whenever the ORD=ALL attribute is used with the web_reg_save_param_ex function, VuGen creates an array containing the number of instances that are actually captured. It also stores the total count for the number of instances automatically. This count can be referenced by getting the value of “_count”. For example, if the parameter name is ParamName, a separate parameter ParamName_count will be available with number of times the value was captured. This can also serve as index for last values captured. Use the sample code below to Read Entire Entry

Let’s have a little fun today – and hopefully I can get some interaction from you C Guru’s out there. How about something cryptic in C? Let’s say I wanted to remove some trailing spaces with as few lines of C code as possible. Will the example below work?
static char* rtrim( char* s)
{
int i;
if (s){i = strlen(s); while ((–i)>0 && isspace(s[i]) ) s[i]=0;}
return s;
};
Why or why not? Care to explain what this code is doing? Comments are open and welcome. Read Entire Entry

There may be times where you want to build in logic for how your Vuser reacts to the various types of HTTP status return codes received throughout a script. For example, as web servers get overloaded, they may start sending 503 return codes. If you wanted to try and resubmit and finish out the transaction, this might be a more graceful way to handle the occasional 503 than just giving up and killing the iteration immediately. Of course, as the load continues to increase, the 503’s will become more frequent and eventually you will Read Entire Entry