How to overide db for testing CLI commands

[uday12kumar]

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Example Code

import typer


app = typer.Typer()

def get_db():
    return sessionLocal()

@app.command()
def tasks():
    session = get_db()
    tasks_ = session.scalars(select(Tasks)).all()
    typer.echo(f"tasks count = {len(tasks_)}")

how to over-ride get_db method.

Description

I have created commands which use database session to fetch the data from the db. Is there any way I can test the commands by over-riding the database session for testing the typer commands

Operating System

Linux

Operating System Details

No response

Typer Version

0.9.0

Python Version

3.8

Additional Context

No response

[kinuax]

Mocking the database is one way. There is a Real Python post Understanding the Python Mock Object Library.