Remove x86 macOS runners from the test suite #279

	name: Test Keras include guards
	# These tests check that the include guards checking for Keras availability
	# behave as expected on ubuntu and macOS.

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	keras_guards:
	name: Test include guards
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest]
	runs-on: ${{ matrix.os }}
	steps:
	- name: Check out repository
	uses: actions/checkout@v3

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.12'

	- name: Install cellfinder via pip
	run: python -m pip install -e "."

	- name: Test (working) import
	uses: jannekem/run-python-script-action@v1
	env:
	KERAS_BACKEND: torch
	with:
	fail-on-error: true
	script: \|
	import cellfinder.core
	import cellfinder.napari

	- name: Uninstall keras
	run: python -m pip uninstall -y keras

	- name: Test (broken) import
	id: broken_import
	uses: jannekem/run-python-script-action@v1
	with:
	fail-on-error: false
	script: \|
	import cellfinder.core

	# exit 1 will force an actions exit with a failure reported
	- name: Flag error thrown by broken import
	if: steps.broken_import.outputs.error == 'false'
	run: \|
	echo "Broken import test result was: ${{ steps.broken_import.outputs.error }}"
	exit 1

	# add an additional step to confirm an error occurred in the import
	- name: Confirm error was thrown by broken import
	if: steps.broken_import.outputs.error == 'true'
	run: \|
	echo "Broken import test result was: ${{ steps.broken_import.outputs.error }}"

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