DynamoDB fixtures for pytest

tests, py, test, pytest, fixture, dynamodb, aws, boto, python, pytest-plugin, hacktoberfest
pip install pytest-dynamodb==2.1.0



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What is this?

This is a pytest plugin, that enables you to test your code that relies on a running DynamoDB Database. It allows you to specify fixtures for DynamoDB process and client (resource in AWS boto terms).

How to use


Please download the DynamoDB database locally.

Plugin contains two fixtures

  • dynamodb - it's a client/resource fixture that has functional scope. After each test it drops tables in DynamoDB.
  • dynamodb_proc - session scoped fixture, that starts DynamoDB instance at it's first use and stops at the end of the tests.

Simply include one of these fixtures into your tests fixture list.

You can also create additional dynamodb client and process fixtures if you'd need to:

from pytest_dynamodb import factories

dynamodb_my_proc = factories.dynamodb_proc(
    port=None, logsdir='/tmp', delay=True)
dynamodb_my = factories.dynamodb('dynamodb_my_proc')


Each DynamoDB process fixture can be configured in a different way than the others through the fixture factory arguments.


You can define your settings in three ways, it's fixture factory argument, command line option and pytest.ini configuration option. You can pick which you prefer, but remember that these settings are handled in the following order:

  • Fixture factory argument
  • Command line option
  • Configuration option in your pytest.ini file
Configuration options
DynamoDB option Fixture factory argument Command line option pytest.ini option Default
Path to dynamodb jar file dynamodb_dir --dynamodb-dir dynamodb_dir /tmp/dynamodb
host host --dynamodb-host dynamodb_host
port port --dynamodb-port dynamodb_port random
AWS Access Key access_key --dynamodb-aws_access_key dynamodb_aws_access_key access_key
AWS Secret Key secret_key --dynamodb-aws_secret_key dynamodb_aws_secret_key secret_key
AWS Region region --dynamodb-aws_region dynamodb_aws_region us-west-1
Introduce delays delay --dynamodb-delay dynamodb_delay false

Example usage:

  • pass it as an argument in your own fixture

    dynamodb_proc = factories.dynamodb_proc(
  • use --dynamodb-port command line option when you run your tests

    py.test tests --dynamodb-port=8888
  • specify your port as dynamodb_port in your pytest.ini file.

    To do so, put a line like the following under the [pytest] section of your pytest.ini:

    dynamodb_port = 8888

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