Fix: npm prepare script on Windows (refs #166)

.github/workflows/ci.yml

@@ -24,10 +24,16 @@ jobs:
 
   test:
     name: Test
-    runs-on: ubuntu-latest
     strategy:
       matrix:
+        os: [ubuntu-latest]
         node-version: ["8.10.0", 8.x, 10.x, 12.x, 13.x, 14.x]
+        include:
+        - os: windows-latest
+          node: "12.x"
+        - os: macOS-latest
+          node: "12.x"
+    runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout
       uses: actions/checkout@v1

npm-prepare.js

@@ -0,0 +1,14 @@
+"use strict";
+
+const childProcess = require("child_process");
+const fs = require("fs");
+const path = require("path");
+
+const examplesDir = path.resolve(__dirname, "examples");
+const examples = fs.readdirSync(examplesDir);
+
+for (const example of examples) {
+    childProcess.execSync("npm install", {
+        cwd: path.resolve(examplesDir, example)
+    });
+}

package.json

@@ -21,7 +21,7 @@
   ],
   "scripts": {
     "lint": "eslint --ext js,md .",
-    "prepare": "for example in examples/*; do (cd \"$example\" && npm install); done",
+    "prepare": "node ./npm-prepare.js",
     "test": "npm run lint && npm run test-cov",
     "test-cov": "nyc _mocha -- -c tests/{examples,lib}/**/*.js",
     "generate-release": "eslint-generate-release",

tests/lib/plugin.js

@@ -55,7 +55,7 @@ describe("recommended config", () => {
                 // hook-level timeouts uses `this`, so disable the rule.
                 // https://mochajs.org/#hook-level
                 // eslint-disable-next-line no-invalid-this
-                this.timeout(9999);
+                this.timeout(30000);
 
                 execSync("npm link && npm link eslint-plugin-markdown");
             } else {