add a simple pipeline unit test without mara db

mara / mara-pipelines

A lightweight opinionated ETL framework, halfway between plain scripts and Apache Airflow

MIT License

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Closed leo-schick closed 2 years ago

leo-schick commented 2 years ago

Adds a simple unit test for a pipeline execution. To do so I changed the code that the 'mara' db is optional during the pipeline execution:

node cost is not taken from the database
RunLogger will skip logging events to the database when 'mara' database is not defined