How to run scenarios one by one using taurus

[absha...@gmail.com]

Need the execute 2 scenarios one by one.
 
Scenario 1 (Initial environment setup jmx– need to be run only once per test )
Scenario 2 (Should start after Scenario 1 ends)
Scenario2 has multiple thread group which runs in parallel.


Below code executes scenarios in parallel but I need scenarios to be executed one by one.

---
execution:
 - scenario: 
     script: my1.jmx
 - scenario: 
     script: my2.jmx
 
 
Can you please let me know how to config this in Taurus ?
 
 
 
 
Thanks,
AB Shanthosh

[Andrey Pokhilko]

Hi,

To have sequential execution, just execute bzt multiple times in command line.

Andrey Pohilko Chief Scientist P: +7 (909) 631-21-69

[absha...@gmail.com]

Thanks for the quick response.

[grose.m...@gmail.com]

Hey Andrey,

To clarify where my head went with your advice, in the context of step 1. authenticating for an api (runs once). step 2. running the test:  would the recommended way be to have the first bzt execution output a file with authentication tokens that a latter bzt run would consume? 

Or would there be other ways to pass the authentication tokens along?

Thanks

MG

[Andrey Pokhilko]

Well, I don't have full picture of what you do, but I assume you don't need anything from first execution except those authentication tokens. So I'd make first execution to write the CSV file with tokens and second to use this file as data source.

I'd even not to use JMeter for the token generating, usually python/shell scripts are more efficient. Having script generating tokens allows you to use Taurus "shell exec" service to invoke it before each test start. http://gettaurus.org/docs/Services/#Shell-Executor-Service-Module

Andrey Pohilko Chief Scientist P: +7 (909) 631-21-69

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[grose.m...@gmail.com]

Ah interesting, i'll dig into the shell exec service and see how it goes.

Very appreciative of the fast reply!

[Ram]

Hello,

I am also looking for a solution for similar issue ("I don't need anything from first execution except those authentication tokens.") 

I have two scenarios, first scenario has the token and the second one need to use it. 

Tried several ways, but didn't worked. This works fine with local variables declared in single Scenario.

Got to know that this can be implemented using '__StringToFile' function/ or by write/read to csv., but I am not able to invoke this from taurus yml file.

Could you please share a sample snippet to write/ read from csv or to use __StringToFile.  or any better way, in thread safe manner.

Referred https://gettaurus.org/docs/JMeter/#CSV-file-content-configuration, 

[DT]

If you're looking for Taurus-only solution you can consider using JSR223 blocks

Groovy: reading and writing files - appending content

Code snippet to write variable into a file:

new File('file.txt').text = vars.get('your-variable-name')

Code snippet to read the file into a variable:

vars.put('your-variable-name', new File('file.txt').text

More information on Groovy scripting in JMeter: Apache Groovy: What Is Groovy Used For?

[Ram]

Thank you for the response.

Yes, I am looking only for Taurus solution. Not doing anything from jmeter directly.

scenarios:

  scenario1:

    requests:

           - url: 

             extract-jsonpath:

                   userToken: $.access_token

              jsr223: 'vars.put("tokenVar", ${userToken})’.      

             [[ Note: Also tried as below .. 

                        jsr223:

                           execute: after

                           script-text: |

                           vars.put("tokenVar", ${userToken}) ]]

         scenario2:

               requests: 

                 - url: 

                   headers:

                         Authorization: Bearer ${__base64Encode(${tokenVar})}

                            [ [ Note: Also tried to access 

                               Authorization: Bearer ${__base64Encode(${vars.get("tokenVar")})} 

                              I believe I dont have to add jsr223 block to retrieve (access) the value .. 

                            ]]

Getting error jmeter.log as below:

2023-10-20 10:37:41,555 ERROR o.a.j.e.JSR223PostProcessor: Problem in JSR223 script, JSR223PostProcessor

javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:

Script1.groovy: 1: Unexpected input: '(' @ line 1, column 9.

   vars.put("tokenVar", fa6-ba1-4ff-a29-5d782)

           ^

1 error

    at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.compile(GroovyScriptEngineImpl.java:183) ~[groovy-jsr223-3.0.7.jar:3.0.7]

Also explored the option to write file provided above.

As I cannot use put (due to above error), I coudnt write to file using solution provided above-- > new File('file.txt').text = vars.get('your-variable-name')

Thanks for the hint, this is a bad idea, but still I tried a temporary alternative as below: 

In scenario1:

      jsr223:

          execute: after

          script-text: |

            new File('file.txt').text = '${userToken}'    # works fine

In scenario2:

variables:

      userTokenNew: no        # declared a new local variable

 jsr223:

          execute: before

          script-text: |

               userTokenNew = new File('file.txt').text.            # works fine

           headers:

                Authorization: Bearer ${__base64Encode('${userTokenNew}')}.    # Unauthorized error

Could you please let me know if anything wrong in my code ?

If this is a known issue, kindly let me know the best way for passing token between scenarios ?

[DT]

There are too many issues with "your" "code", it will take days to go through each of them separately and explain what's wrong with it and I don't see any point in doing this. Just copy and paste the below example and amend it accordingly to your needs:

execution:

- concurrency: 1

iteraions: 1

scenario: Scenario1

- concurrency: 1

iterations: 1

scenario: Scenario2

scenarios:

Scenario1:

requests:

- url: http://example.com

extract-regexp:

some_variable: (\w+)

match-no: 0

jsr223:

script-text: 'new File("myfile.txt").text = vars.get("some_variable")'

execute: after

Scenario2:

requests:

- url: http://blazedemo.com?parameter=${some_variable}

headers:

Authorization: Bearer ${some_variable}

jsr223:

execute: before

script-text: 'vars.put("some_variable", new File("myfile.txt").text)'

modules:

local:

sequential: true

Just in case get familiarized with the following materials:

• Taurus YAML Tutorial
• Taurus JMeter Executor
• The Groovy Templates Cheat Sheet for JMeter

[Ram]

Thank you for the detailed info, it worked.. !!