[tools] refine ctc alignment #1068

	name: UnitTest

	on:
	pull_request:
	paths:
	- '**.py'

	jobs:
	unit-test:
	runs-on: ${{ matrix.os }}
	strategy:
	max-parallel: 20
	matrix:
	os: [ubuntu-latest]
	python-version: [3.8]
	steps:
	- name: Cache Python Packages
	uses: actions/cache@v1
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/setup.py') }}
	- name: Setup Python
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	architecture: x64
	- name: Fetch Wenet
	uses: actions/checkout@v1
	- name: Checkout PR tip
	run: \|
	set -eux
	if [[ "${{ github.event_name }}" == "pull_request" ]]; then
	# We are on a PR, so actions/checkout leaves us on a merge commit.
	# Check out the actual tip of the branch.
	git checkout ${{ github.event.pull_request.head.sha }}
	fi
	echo ::set-output name=commit_sha::$(git rev-parse HEAD)
	id: get_pr_tip
	- name: Install Wenet Dependencies
	run: \|
	set -eux
	pip install -r requirements.txt
	- name: Run Pytest
	run: \|
	set -eux
	pytest --version
	PYTHONPATH="${PYTHONPATH:-}:$(pwd)" pytest -q
	if [ $? != 0 ]; then exit 1; fi

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