add a few test about functions #54

	name: Node.js CI

	on:
	push:
	branches:
	- '*'
	pull_request:
	branches: [ main ]

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [16.x, 18.x, 20.x, 21.x]

	steps:
	- uses: actions/checkout@v2
	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v1
	with:
	node-version: ${{ matrix.node-version }}

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Install ANTLR
	run: yarn setup-antlr

	- name: Generate ANTLR Source Files
	run: yarn lang

	- name: Install dependencies
	run: yarn install

	- name: Compile TypeScript
	run: yarn tsc

	- name: Run all tests with coverage
	run: yarn cover

	- name: Run linter
	run: yarn lint

	- name: Run prettier check
	run: yarn pretty --check

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