Snapshot testing for pytest

Extracted snapshot testing lib for LocalStack.

This project is in a very early stage and will be both restructured and renamed.

Quickstart

To install the python and other developer requirements into a venv run:

make install

There's a few env vars that can be used with this project:

TEST_TARGET: Set to AWS_CLOUD to use an externally-deployed instance when running tests.
SNAPSHOT_LEGACY_REPORT: By default set to 0. Can be set to 1. This enables the legacy reporting output style.
SNAPSHOT_UDPATE: By default set to 0. Can be set to 1. This enables updating the snapshot file rather than comparing with its contents.
SNAPSHOT_RAW: By default set to 0. Can be set to 1. This outputs an additional snapshot file which contains the untransformed values.

We use black and isort as code style tools. To execute them, run:

make format

To build a wheel and source distribution, simply run

make dist