Writing unit tests for Fast-API using FakeRedis

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FastAPI is a popular Python web framework that is designed to be fast and easy to use. It comes with built-in support for interacting with Redis, a popular in-memory data structure store. In this tutorial, we will explain how to create unit tests for a FastAPI application using Fakeredis mocks for the Redis interactions.

Prerequisites:

• Python 3.6 or later
• FastAPI and Redis-py libraries installed
• Fakeredis library installed

Step 1: Set up the project

First, create a new directory for the project and navigate to it in the terminal. Then, create a new Python virtual environment and activate it:

$ python3 -m venv myenv
$ source myenv/bin/activate

Next, install the necessary packages:

$ pip install fastapi redis fakeredis pytest

Step 2: Create a FastAPI application

Create a new Python file named main.py and add the following code:

from fastapi import FastAPI
import redis

app = FastAPI()
redis_conn = redis.Redis(host='localhost', port=6379)…