Useful JMeter functions for scripting

JMeter Features

By Tharinda Liyanage

XPath• XPath is used to navigate through elements and attributes in an XML

document//form[@name='fm1']//input[@name='lt']/@value

XPath Extractor

//form[@name='fm1']//input[@name='lt']/@value

• JMeter variable – ${t}

Regular Expression

• Matches string patterns

• input type="hidden" name="lt" value="(.*)"

Reference Name: MYREF Regex: name="(.+?)" value="(.+?)" Template: $1$$2$

Reg Ex

• ( ) - grouping • [ ] - character classes • { } - repetition • * + ? - repetition • . - wild-card character • \ - escape character • | - alternatives • ^ $ - start and end of string or line

Functions• __log()• __threadNum()- The thread number function simply returns the number of the thread currently being

executed ${__log(${__threadNum},,,******Thread_Number is*********:: )}

• __machineName() The machineName function returns the local host name

• __RandomString ()

RandomString(var1,var2,var3),where:var1 - Random string lengthvar2 - Chars to use for random string generationvar3 - Name of variable in which to store the result (optional)

• Counter

Database Testing• Step 1: Put downloaded JDBC driver (sqljdbc4.jar) under "JMeter/lib/" directory. • Step 2 : Adding JDBC Connection Configuration

• Step 3: Adding JDBC Request