Ensure that landmark abstractions return h(s)=0 if not all #173

	---
	name: macOS

	on:
	push:
	branches: [main, issue, release-, scorpion]
	pull_request:
	branches: [main, issue, release-, scorpion]

	jobs:
	test:
	name: Compile and test planner
	timeout-minutes: 60
	runs-on: ${{ matrix.version.macos }}
	strategy:
	matrix:
	version:
	- {macos: macos-11, python: '3.8'}
	- {macos: macos-12, python: '3.10'}
	steps:
	- name: Clone repository
	uses: actions/checkout@master

	- name: Install Python
	uses: actions/setup-python@master
	with:
	python-version: ${{ matrix.version.python }}

	- name: Compile planner
	run: \|
	export CXXFLAGS="-Werror" # Treat compilation warnings as errors.
	./build.py
	./build.py --debug

	- name: Install tox
	run: \|
	pip3 install tox

	- name: Install VAL
	run: \|
	brew install gnu-sed
	git clone https://github.com/KCL-Planning/VAL.git
	cd VAL
	git checkout a5565396007eee73ac36527fbf904142b3077c74
	make clean # Remove old build artifacts and binaries.
	gsed -i 's/-Werror //g' Makefile # Ignore warnings.
	make -j2
	mv validate ../
	cd ../
	rm -rf VAL

	- name: Run driver, translator and search tests
	run: \|
	export PATH="$(pwd):$PATH" # Add VAL to path.
	cd misc
	tox -e driver,translator,search

	...

Provide feedback