Add GH actions workflow

.github/workflows/build-and-test.yml

@@ -0,0 +1,39 @@
+name: Build and test webpack-virtual-modules
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        webpack-version: [3, 4, 5]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ./.yarn/releases
+          ./.yarn/cache
+        key: ${{ runner.os }}-install-${{ hashFiles('yarn.lock') }}-v4
+
+    - name: 'Use Node.js 12.x'
+      uses: actions/setup-node@master
+      with:
+        node-version: 12.x
+
+    - name: Install Webpack ${{ matrix.webpack-version }}
+      run: |
+        yarn config set enableMirror false
+        yarn config set enableGlobalCache false
+        yarn add webpack@${{ matrix.webpack-version }}
+
+    - name: Run tests
+      run: yarn test

.yarnrc.yml

@@ -1,5 +1,5 @@
 nodeLinker: node-modules
 compressionLevel: 0
 enableGlobalCache: true
-yarnPath: .pinyarn
+yarnPath: .pinyarn.js
 nmHoistingLimits: dependencies

package.json

@@ -9,8 +9,7 @@
     "watch": "tsc -p tsconfig.build.json -w",
     "tests": "jest",
     "tests:watch": "jest --watch",
-    "test": "yarn lint && yarn coverage && yarn tests",
-    "coverage": "NODE_ENV=coverage nyc --check-coverage --lines 85 --branches 60 yarn tests",
+    "test": "yarn lint && yarn tests",
     "lint": "eslint --fix src/**/*.ts",
     "prepack": "yarn clean && yarn build"
   },
@@ -51,7 +50,6 @@
     "jest": "^26.6.0",
     "lint-staged": "^10.4.2",
     "memory-fs": "^0.5.0",
-    "nyc": "^15.1.0",
     "prettier": "^2.1.2",
     "tmp": "^0.2.1",
     "typescript": "^4.0.3",

src/__tests__/index.test.ts

@@ -2,7 +2,6 @@ import MemoryFileSystem from 'memory-fs';
 import webpack from 'webpack';
 import path from 'path';
 import Plugin from '../index';
-import { resolve } from 'dns';
 
 describe('webpack-virtual-modules', () => {
   it('should fail if not applied as plugin', () => {