test: verify that umd bundles load successfully (#1171)

test/umd.test.ts

@@ -0,0 +1,34 @@
+import { readFileSync } from 'fs';
+import { resolve } from 'path';
+
+import { JSDOM } from 'jsdom';
+
+describe('UMD bundle', () => {
+  test.each([
+    'autocomplete-core',
+    'autocomplete-js',
+    'autocomplete-plugin-algolia-insights',
+    'autocomplete-plugin-query-suggestions',
+    'autocomplete-plugin-recent-searches',
+    'autocomplete-plugin-redirect-url',
+    'autocomplete-plugin-tags',
+    'autocomplete-preset-algolia',
+  ])('%s loads successfully', (name) => {
+    const bundle = readFileSync(
+      resolve(process.cwd(), `packages/${name}/dist/umd/index.production.js`),
+      'utf8'
+    );
+
+    const { window } = new JSDOM('', { runScripts: 'dangerously' });
+
+    const errorFn = jest.fn();
+    window.addEventListener('error', errorFn);
+
+    const script = window.document.createElement('script');
+    script.textContent = bundle;
+    window.document.body.appendChild(script);
+
+    expect(errorFn).not.toHaveBeenCalled();
+    expect(window[`@algolia/${name}`]).toBeDefined();
+  });
+});