Throw an error in writer if property isn't defined #83

	# Builds and runs pytest on ubuntu-latest
	# Tests python versions >=3.8
	name: Test Koza

	on:
	push:
	branches: [ main ]
	pull_request:
	workflow_dispatch:

	jobs:
	# https://github.com/actions/setup-python
	test-python3-ubuntu-latest:
	name: test py${{ matrix.python-version }} on linux
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']
	env:
	PYTHON: ${{ matrix.python-version }}
	OS: ubuntu

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	#----------------------------------------------
	# install & configure poetry
	#----------------------------------------------
	- name: Install Poetry
	uses: snok/install-poetry@v1

	#----------------------------------------------
	# install your root project, if required
	#----------------------------------------------
	- name: Install library
	run: poetry install --with dev --no-interaction

	#----------------------------------------------
	# run pytest
	#----------------------------------------------
	- name: Run tests
	run: poetry run pytest tests

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