Initial Use of LocalStack from a Python/CLI Perspective

localstack_test.py

#!/usr/bin/env pytest
"""

Configuring python test environment to work against LocalStack

Expanding upon README.md in https://github.com/localstack/localstack-python-client

Pre-reqquisites:
    pip install localstack-client pytest &&
    git clone https://github.com/localstack/localstack.git &&
    cd localstack &&
    docker-compose up

Usage:
    pytest ./this_file.py

Re-point awscli terminal functionality to LocalStack:
    pip install awscli-local &&
    alias aws='awslocal'

"""

import boto3

from localstack_client.session import Session
import pytest


@pytest.fixture(autouse=True)
def boto3_localstack_patch(monkeypatch):
    """
    pytest's monkeypatch plugin uses automatically, ensuring LocalStack
    will be targeted instead of AWS
    """
    session_ls = Session()
    monkeypatch.setattr(boto3, "client", session_ls.client)
    monkeypatch.setattr(boto3, "resource", session_ls.resource)

"""
Python/Boto3 code past this point can be written without regard
to whether the environment is AWS or LocalStack.
"""

def test_sts() -> None:
    sts = boto3.client("sts")
    assert sts.get_caller_identity() is not None


def test_sqs() -> None:
    sqs = boto3.client("sqs")
    assert sqs.list_queues() is not None


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