JMeter : How to increment dates by +1 within date ranges for every iteration

Question

I want to increment by 1 day 2 dates at every iteration using Jmeter i.e.

• Date1 : 2014/01/01 (iteration1 = 2014/01/02) , (iteration1 = 2014/01/03) etc

• Date 2 : 2014/09/01 (iteration1 = 2014/09/02) , (iteration1 = 2014/01/03) etc

How can I do it ?

Solution 1

For JMeter specifics:

1. Add User Defined Variables element to set initial date values like

   • DATE1=2014/01/01
   • DATE2=2014/09/01

2. Add a Beanshell PreProcessor as a child of the request where you need these updated dates. Put the following code into the PreProcessor's "Script" are:

   import java.text.SimpleDateFormat; // necessary
   import java.util.Calendar; // imports
   import java.util.Date;
   
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd"); // define date format
   Date date1 = sdf.parse(vars.get("DATE1")); // get DATE1 from User Defined variables
   Date date2 = sdf.parse(vars.get("DATE2")); // get DATE2 from UDV
   
   Calendar cal = Calendar.getInstance(); // get Calendar instance
   cal.setTime(date1); // set Calendar's time to be DATE1
   cal.add(Calendar.DAY_OF_YEAR,1); // add 1 day to DATE1
   date1 = cal.getTime(); // set the new value for date1
   vars.put("DATE1",sdf.format(date1)); // update DATE1 JMeter variable
   
   cal.setTime(date2); // set Calendar time to DATE2
   cal.add(Calendar.DAY_OF_YEAR,1); // add 1 day
   date2 = cal.getTime(); // set the new value for date2
   vars.put("DATE2",sdf.format(date2)); // update DATE2 JMeter variable
   
   log.info("DATE1=" + vars.get("DATE1")); // print value of DATE1 to jmeter.log
   log.info("DATE2=" + vars.get("DATE2")); // print value of DATE2 to jmeter.log 
   

Being executed for 3 times it provides the following output:

2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE1=2014/01/02 
2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE2=2014/09/02 
2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE1=2014/01/03 
2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE2=2014/09/03 
2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE1=2014/01/04 
2014/08/30 10:11:13 INFO  - jmeter.util.BeanShellTestElement: DATE2=2014/09/04 

1. Refer to the variables as ${DATE1} and ${DATE2} where required.

For more information on Beanshell scripting in Apache JMeter check out How to use BeanShell: JMeter's favorite built-in component guide

Solution 2

In JMeter:

0/ First install Groovy:

• Download it from http://groovy.codehaus.org/ , current version as of today is 2.3.6

• Unzip the file and find folder embeddable and copy groovy-all-2.3.6.jar in jmeter/lib folder

• Restart JMeter

• That's it !

1/ Add User Defined Variables element to set initial date values like this:

- DATE1=2014/01/01
- DATE2=2014/09/01

2/ The recommended way to do this for REDUCED SYNTAX, PERFORMANCE and LANGUAGE POWER is to use Groovy + JSR223 PreProcessor, configure it this way:

3/ Paste this code in JSR 223 PreProcessor:

 final String DATE_PATTERN = "yyyy/MM/dd";  
 def d1Plus1 = Date.parse(DATE_PATTERN, vars["DATE1"] ) + 1;
 def d2Plus1 = Date.parse(DATE_PATTERN, vars["DATE2"] ) + 1;
 vars.put("DATE1", d1Plus1.format(DATE_PATTERN));
 vars.put("DATE2", d2Plus1.format(DATE_PATTERN));

4/ Refer to your variables as ${DATE1} and ${DATE2}

5/ Running this Plan show this result:

For why Groovy is your best choice read this:

• http://www.ubik-ingenierie.com/blog/jmeter_performance_tuning_tips/