Unit Test doesn't worked in Externalized Configuration

[a0529gox]

Description

No response

Steps to Reproduce

I use config variable as below. It works fine in usual. It occurs error during unit test as below:

command for running unit test server

\wso2mi-4.4.0\bin\micro-integrator.bat -DsynapseTest --env-file="\wso2mi-4.4.0\conf\file.properties"

{MI_HOME}\conf\file.properties

endpoint_pi_basicAuth=Basic d3NvMjp3c28y

{MI_PROJECT}\src\main\wso2mi\resources\conf\config.properties

endpoint_pi_basicAuth:string

Sequence:

<sequence name="PIHeaderSequence" trace="disable" xmlns="http://ws.apache.org/ns/synapse">
    <header name="Authorization" action="set" scope="transport"
        expression="${configs.endpoint_pi_basicAuth}" />
</sequence>

error message

[2025-03-14 17:01:40,596]  WARN {SynapseExpression} - Error evaluating expression: configs.endpoint_pi_basicAuth cause : Could not fetch the value of the key: endpoint_pi_basicAuth

Version

4.4.0

Environment Details (with versions)

No response

[Darshaka-Weerasinghe]

Hi There... I'm interested in to solve this issue. can you please assign to me

[d3varaja]

Hi Can I take this up? Thanks!

[OjithUddeeptha]

Hi I'm ojith, can I work on this issue?

[myleshmulecraft]

Hi @a0529gox , This issue is interesting to resolve. Kindly assign it to me.

[SachinthaHewawasam]

I'd be happy to have a look

[adityagupta0251]

Hi @a0529gox 👋,

I’m interested in working on this issue for Hacktoberfest.
I can help troubleshoot why unit tests fail with externalized configuration and provide a fix to ensure the configuration variables are correctly loaded during tests.

Could you kindly assign this issue to me? 🙏