output

   {'version_number': 'v1_0'}

settings.jinja

{# Layer together the various defaults. #}
{% set settings = {} %}

{% macro this_test(version_number) %}
{% do settings.update({'version_number': version_number}) %}
{%endmacro%}

{# Additional settings collections ommitted #}

test.sls

{% set version_number = 'v1_0' %}
{% from "testing/settings.jinja" import settings,this_test with context %}
{% do this_test(version_number) %}
{{settings}}