Mock class and implement custom polling test #434

	name: 'ESLint check'
	on: [pull_request]

	jobs:
	eslint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2

	- name: Setup Node.js
	uses: actions/setup-node@v2
	with:
	node-version: ${{ env.NODE_VERSION }}

	- uses: actions/cache@v2
	with:
	path: '**/node_modules'
	key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}

	- name: Install modules
	run: yarn

	- name: Lint
	run: yarn lint

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