Add ExpressionOperator enum to centralise #64

	---
	name: Test Suite

	on:
	push:
	branches:
	- "**"
	pull_request:
	branches: ["main"]
	schedule:
	- cron: "0 0 * * *"

	jobs:
	tests:
	name: "Python ${{ matrix.python-version }}"
	runs-on: "ubuntu-latest"
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]

	services:
	mongodb:
	image: mongo:latest
	env:
	MONGO_INITDB_ROOT_USERNAME: root
	MONGO_INITDB_ROOT_PASSWORD: mongoadmin
	MONGO_INITDB_DATABASE: mongodb
	ports:
	- 27017:27017

	mongo-express:
	image: mongo-express
	ports:
	- 8081:8081
	env:
	ME_CONFIG_MONGODB_ENABLE_ADMIN: 'true'
	ME_CONFIG_MONGODB_SERVER: mongodb
	ME_CONFIG_MONGODB_ADMINUSERNAME: root
	ME_CONFIG_MONGODB_ADMINPASSWORD: mongoadmin
	ME_CONFIG_BASICAUTH_USERNAME: admin
	ME_CONFIG_BASICAUTH_PASSWORD: password

	steps:
	- uses: "actions/checkout@v3"
	- uses: "actions/setup-python@v4"
	with:
	python-version: "${{ matrix.python-version }}"
	allow-prereleases: true
	- uses: actions/cache@v3
	id: cache
	with:
	path: ${{ env.pythonLocation }}
	key: ${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}-test-v02
	- name: "Install dependencies"
	if: steps.cache.outputs.cache-hit != 'true'
	run: "scripts/install"
	# - name: "Run linting checks"
	# run: "scripts/check"
	- name: "Run tests"
	env:
	DATABASE_URI: "mongodb://root:mongoadmin@localhost:27017"
	run: "scripts/test"

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