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Moto - Mock AWS Services

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Install

$ pip install 'moto[ec2,s3,all]'

In a nutshell

Moto is a library that allows your tests to easily mock out AWS Services.

Imagine you have the following python code that you want to test:

import boto3


class MyModel:
    def __init__(self, name, value):
        self.name = name
        self.value = value

    def save(self):
        s3 = boto3.client("s3", region_name="us-east-1")
        s3.put_object(Bucket="mybucket", Key=self.name, Body=self.value)

Take a minute to think how you would have tested that in the past.

Now see how you could test it with Moto:

import boto3
from moto import mock_aws
from mymodule import MyModel


@mock_aws
def test_my_model_save():
    conn = boto3.resource("s3", region_name="us-east-1")
    # We need to create the bucket since this is all in Moto's 'virtual' AWS account
    conn.create_bucket(Bucket="mybucket")
    model_instance = MyModel("steve", "is awesome")
    model_instance.save()
    body = conn.Object("mybucket", "steve").get()["Body"].read().decode("utf-8")
    assert body == "is awesome"

With the decorator wrapping the test, all the calls to s3 are automatically mocked out. The mock keeps track of the state of the buckets and keys.

For a full list of which services and features are covered, please see our implementation coverage.

Documentation

The full documentation can be found here:

http://docs.getmoto.org/en/latest/

Financial Contributions

Support this project and its continued development, by sponsoring us!

Click the Sponsor-button at the top of the page for more information.

Our finances are managed by OpenCollective, which means you have full visibility into all our contributions and expenses: https://opencollective.com/moto

Security contact information

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.

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