Handle case when no unique values for field #7

	name: tests

	on:
	push:
	branches: [ main ]
	paths:
	- '**.py'
	- '.github/workflows/tests.yml'
	pull_request:
	branches: [ main ]
	paths:
	- '**.py'
	- '.github/workflows/tests.yml'
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8"]

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: python3 -m pip install '.[test]'
	- name: Lint with ruff
	run: \|
	python -m pip install ruff
	python -m ruff check .
	- name: Test with unittest
	run: \|
	python -m unittest

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