Add unit tests for `simulate_tree_mcm` #51483

	name: Formatting check
	on:
	pull_request:
	types:
	- opened
	- reopened
	- synchronize
	- ready_for_review

	jobs:
	black-pylint:
	if: github.event.pull_request.draft == false
	runs-on: ubuntu-latest

	steps:
	- name: Cancel Previous Runs
	uses: styfle/cancel-workflow-action@0.11.0
	with:
	access_token: ${{ github.token }}

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: "3.10"

	- name: Install dependencies
	run: pip install black pylint==2.7.4 isort==5.13.2

	- uses: actions/checkout@v2

	- name: Run Black
	run: \|
	black -t py310 -t py311 -t py312 -l 100 pennylane/ --check
	black -t py310 -t py311 -t py312 -l 100 tests/ --check

	- name: Run isort
	run: \|
	isort --py 312 --profile black -l 100 -o autoray -p ./pennylane --skip __init__.py --filter-files ./pennylane --check
	isort --py 312 --profile black -l 100 -o autoray -p ./pennylane --skip __init__.py --filter-files ./tests --check

	- name: Run Pylint (source files)
	if: always()
	run: pylint --rcfile .pylintrc $(find pennylane -name "*.py")

	- name: Run Pylint (test files)
	if: always()
	run: pylint --rcfile tests/.pylintrc $(find tests -name "*.py")

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