extract_invariant now correctly extracts first layer when num_layers=1 #306

	name: unit tests
	on:
	pull_request:
	push:
	branches: [main]

	jobs:
	pytest-container:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: "3.10"
	cache: "pip"

	- name: Install requirements
	run: \|
	pip install -U pip
	pip install .[dev]

	- name: Log installed environment
	run: \|
	python3 -m pip freeze

	- name: Run unit tests
	run: \|
	pytest tests

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