added: commonjs interop tests

build/rollup.node.config.js

@@ -9,7 +9,7 @@ export default {
     // bundle only the json files
     json(),
     nodeResolve({
-      extensions: ['.js', '.js', '.json'],
+      extensions: ['.js', '.json'],
       // globals.json is the only file that we don't want to import
       resolveOnly: ['globals'],
     }),
@@ -20,6 +20,7 @@ export default {
       file: './dist/index.cjs',
       name: 'compiler',
       format: 'cjs',
+      interop: 'auto',
       ...defaultConfig.output,
     },
     {

package.json

@@ -31,8 +31,8 @@
     "postest": "npm run cov-html",
     "test-types": "tsc -p test",
     "test-runtime": "karma start test/karma.conf.cjs",
-    "test": "c8 mocha test/*.spec.js test/**/*.spec.js && npm run test-types",
-    "debug": "mocha --inspect --inspect-brk test/*.spec.js test/**/*.spec.js",
+    "test": "c8 mocha 'test/**/*.spec.{js,cjs}' && npm run test-types",
+    "debug": "mocha --inspect --inspect-brk 'test/**/*.spec.{js,cjs}'",
     "prepublishOnly": "npm run build && npm run lint && npm run test && npm run test-runtime"
   },
   "repository": {

test/commonjs.spec.cjs

@@ -0,0 +1,10 @@
+const { expect } = require('chai')
+
+describe('commonjs bundle', () => {
+  it('commonjs imports work properly', () => {
+    const {compile} = require('../dist/index.cjs')
+
+    expect(() => compile('<test></test>')).to.not.throw()
+  })
+})
+