Passing variables to Random function

${__Random(0,${numFiles},docIndex)} should work Where are you specifying
this ? Note special considerations apply if you are trying this within for
e.g. a beanshell sampler

Post by David Fertig
I have a variable called numFiles, which I can print and verify contains an integer.
Integer numFiles = vars.getObject("numFiles");
I want to make a random number between 0 and that value. But all of the following fail
${__Random(0,__ ${numFiles},docIndex)};
Integer docIndex = ${__Random(0,${numFiles})};
${__Random(0,__ numFiles,docIndex)};
Integer docIndex = ${__Random(0,numFiles)};
"${NUMFILES}". See log file for details.
"numFiles". See log file for details.
How do I pass a variable into the random() function?
Thank you
David
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Felix Schumacher

2018-08-22 15:06:03 UTC

It seems that this is a bug. At the moment the Strings given to __Random
will not be evaluated (and therefore the Integer will not be transformed
into a String).

Till the bug is fixed, you will have to transform the Integer into a
String by yourself.

Regards,
Felix

Post by David Fertig
Thank you
David
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Felix Schumacher

2018-08-22 15:14:14 UTC

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

sebb

2018-08-22 15:50:24 UTC

On 22 August 2018 at 16:14, Felix Schumacher

It seems that this is a bug. At the moment the Strings given to __Random
will not be evaluated (and therefore the Integer will not be transformed
into a String).

On second thought "bug" might be a bit harsh, as no function in JMeter will
currently transform those values by itself (yet?).

It's not a bug (or even a feature). It's not supported.

Variables were designed to be used for replacement of fixed text in test plans.
e.g.. instead of

http://a.b.c:80/

one could have the following textual definitions (e.g. on the Test Plan):

HOST=a.b.c
PORT=80

and use the following instead:
http://${HOST}:${PORT}/

It so happens that the variables are stored in a structure that allows
the values to be arbitrary objects.

This proved useful for passing data between scripts
(putObject/getObject), but was never intended for use in the test plan
textual substitution functionality.

Variables that are used in test plan elements must have values that are Strings.

A simple way to fix the errors is to ensure that the script stores the
value as a String (e.g. using a new variable name).

To answer your question, you could use __evalVar function to convert your
${__Random(0,${__evalVar(numFiles)})}
Regards,
Feli
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David Fertig

2018-08-23 15:34:06 UTC

Post by Felix Schumacher
${__Random(0,${__evalVar(numFiles)})}

Unfortunately this also does not work.

2018-08-23 11:32:53,096 ERROR o.a.j.JMeter: Uncaught exception: java.lang.NumberFormatException: For input string: ""

-----Original Message-----
From: Felix Schumacher <***@internetallee.de>
Sent: Wednesday, August 22, 2018 11:14 AM
To: ***@jmeter.apache.org
Subject: Re: Passing variables to Random function

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

Felix Schumacher

2018-08-23 19:15:32 UTC

Post by Felix Schumacher
${__Random(0,${__evalVar(numFiles)})}

Unfortunately this also does not work.
2018-08-23 11:32:53,096 ERROR o.a.j.JMeter: Uncaught exception: java.lang.NumberFormatException: For input string: ""

Are you sure, that your variable numFiles is spelled correct? Try to add
a debug sampler to check.

Felix

Post by David Fertig
-----Original Message-----
Sent: Wednesday, August 22, 2018 11:14 AM
Subject: Re: Passing variables to Random function

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

On second thought "bug" might be a bit harsh, as no function in JMeter will currently transform those values by itself (yet?).
${__Random(0,${__evalVar(numFiles)})}
Regards,
Feli
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Deepak Shetty

2018-08-23 19:41:46 UTC

Hi
here is my example that works

https://onedrive.live.com/?cid=1BD02FE33F80B8AC&id=1BD02FE33F80B8AC%211557&parId=1BD02FE33F80B8AC%21268&o=OneUp

Post by Felix Schumacher
${__Random(0,${__evalVar(numFiles)})}

Unfortunately this also does not work.
java.lang.NumberFormatException: For input string: ""
-----Original Message-----
Sent: Wednesday, August 22, 2018 11:14 AM
Subject: Re: Passing variables to Random function

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

LERBSCHER JEAN-PIERRE

2018-08-27 07:13:14 UTC

Hi,

Is numFiles an expression?

There is a gap in user manual between eval function and evalVar function.

Variables eval<https://jmeter.apache.org/usermanual/functions.html#__eval> evaluate a variable expression 2.3.1
Variables evalVar<https://jmeter.apache.org/usermanual/functions.html#__evalVar> evaluate an expression stored in a variable 2.3.1

________________________________
De : David Fertig <***@navihealth.com>
Envoyé : jeudi 23 août 2018 17:34
À : JMeter Users List
Objet : RE: Passing variables to Random function

Post by Felix Schumacher
${__Random(0,${__evalVar(numFiles)})}

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

David Fertig

2018-08-27 14:28:43 UTC

numFIles is an Integer.

I've made a workaround on this by generating a random 0-1 million, creating a fraction, and then multiplying by my original value. Just a workout, but works in my case.

-----Original Message-----
From: LERBSCHER JEAN-PIERRE <***@hotmail.com>
Sent: Monday, August 27, 2018 3:13 AM
To: JMeter Users List <***@jmeter.apache.org>
Subject: RE: Passing variables to Random function

Hi,

Is numFiles an expression?

There is a gap in user manual between eval function and evalVar function.

Variables eval<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjmeter.apache.org%2Fusermanual%2Ffunctions.html%23__eval&data=02%7C01%7CDavid.Fertig%40navihealth.com%7C065d5908de1a45f21ad008d60bec951b%7C6e94af0345c143158632e1c94ce46b97%7C1%7C0%7C636709508094251230&sdata=Sls%2BioMpQ7866EyE%2Falv0A%2Fex7Ix52TzgguUZELRHbU%3D&reserved=0> evaluate a variable expression 2.3.1
Variables evalVar<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjmeter.apache.org%2Fusermanual%2Ffunctions.html%23__evalVar&data=02%7C01%7CDavid.Fertig%40navihealth.com%7C065d5908de1a45f21ad008d60bec951b%7C6e94af0345c143158632e1c94ce46b97%7C1%7C0%7C636709508094251230&sdata=l%2FQaMA6czWkYhHefPHwsM9Wh%2BmlLqTQGOjlgjT5N3VE%3D&reserved=0> evaluate an expression stored in a variable 2.3.1

________________________________

Post by Felix Schumacher
${__Random(0,${__evalVar(numFiles)})}

It seems that this is a bug. At the moment the Strings given to
__Random will not be evaluated (and therefore the Integer will not be
transformed into a String).

On second thought "bug" might be a bit harsh, as no function in JMeter will currently transform those values by itself (yet?).

To answer your question, you could use __evalVar function to convert your Integer into a String:

${__Random(0,${__evalVar(numFiles)})}

Regards,
Feli

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Deepak Shetty

2018-08-23 01:42:14 UTC

Hi
I initially tried this with a string , but I dont get this issue with an
integer either - How were you able to replicate
Thread group
+Bean Shell sampler // vars.putObject("numFiles",new Integer(10));
+Http Request
++ParamValue - ${__Random(0,${numFiles},docIndex)}

which works fine.

On Wed, Aug 22, 2018 at 8:06 AM Felix Schumacher <

Post by David Fertig
I have a variable called numFiles, which I can print and verify contains

an integer.

Post by David Fertig
Integer numFiles = vars.getObject("numFiles");
I want to make a random number between 0 and that value. But all of the

following fail

Post by David Fertig
${__Random(0,__ ${numFiles},docIndex)};
Integer docIndex = ${__Random(0,${numFiles})};
${__Random(0,__ numFiles,docIndex)};
Integer docIndex = ${__Random(0,numFiles)};

"${NUMFILES}". See log file for details.
"numFiles". See log file for details.

Post by David Fertig
How do I pass a variable into the random() function?

It seems that this is a bug. At the moment the Strings given to __Random
will not be evaluated (and therefore the Integer will not be transformed
into a String).
Till the bug is fixed, you will have to transform the Integer into a
String by yourself.
Regards,
Felix

Post by David Fertig
Thank you
David
This email, including attachments, may contain information that is

privileged, confidential or is exempt from disclosure under applicable law
(including, but not limited to, protected health information). It is not
intended for transmission to, or receipt by, any unauthorized persons. If
the reader of this message is not the intended recipient, or the employee
or agent responsible for delivering the message to the intended recipient,
you are hereby notified that any dissemination, distribution or copying of
this communication is strictly prohibited. If you believe this email was
sent to you in error, do not read it. Please notify the sender immediately
informing them of the error and delete all copies and attachments of the
message from your system. Thank you.
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Felix Schumacher

2018-08-23 08:43:11 UTC

Post by Deepak Shetty
Hi
I initially tried this with a string , but I dont get this issue with an
integer either - How were you able to replicate
Thread group
+Bean Shell sampler // vars.putObject("numFiles",new Integer(10));
+Http Request
++ParamValue - ${__Random(0,${numFiles},docIndex)}

Try to use the title of a sampler. Parameters seem to be handled
differently.

Felix

Post by Deepak Shetty
which works fine.
On Wed, Aug 22, 2018 at 8:06 AM Felix Schumacher <

Post by David Fertig
I have a variable called numFiles, which I can print and verify contains

an integer.

Post by David Fertig
Integer numFiles = vars.getObject("numFiles");
I want to make a random number between 0 and that value. But all of the

following fail

Post by David Fertig
${__Random(0,__ ${numFiles},docIndex)};
Integer docIndex = ${__Random(0,${numFiles})};
${__Random(0,__ numFiles,docIndex)};
Integer docIndex = ${__Random(0,numFiles)};

"${NUMFILES}". See log file for details.
"numFiles". See log file for details.

Post by David Fertig
How do I pass a variable into the random() function?

It seems that this is a bug. At the moment the Strings given to __Random
will not be evaluated (and therefore the Integer will not be transformed
into a String).
Till the bug is fixed, you will have to transform the Integer into a
String by yourself.
Regards,
Felix

Post by David Fertig
Thank you
David
This email, including attachments, may contain information that is

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Deepak Shetty

2018-08-23 14:07:45 UTC

Hi
title worked too

regards
deepak

On Thu, Aug 23, 2018 at 1:43 AM Felix Schumacher <

Try to use the title of a sampler. Parameters seem to be handled
differently.
Felix

Post by Deepak Shetty
which works fine.
On Wed, Aug 22, 2018 at 8:06 AM Felix Schumacher <