data-dwh-dbt-project/macros/tests/is_last_day_of_month.sql

{% test is_last_day_of_month(model, column_name) %}
    select *
    from {{ model }}
    where
        {{ column_name }} != (
            date_trunc('MONTH', {{ column_name }})
            + interval '1 MONTH'
            - interval '1 DAY'
        )
{% endtest %}