test: add test for gh-11943

Author: maciasello

.github/workflows/test.yml

@@ -41,6 +41,8 @@ jobs:
           ln -s `pwd` ./test/typescript/node_modules/mongoose
           echo `pwd`/mongodb-linux-x86_64-ubuntu1804-4.0.2/bin >> $GITHUB_PATH
 
+      - run: npm run build-browser
+
       - run: npm test
 
   lint:

test/browser.test.js

@@ -20,6 +20,10 @@ describe('browser', function() {
     exec('node --eval "require(\'./lib/browser\')"', done);
   });
 
+  it('require() works in an environment where process.versions is an empty object (gh-5842)', function(done) {
+    exec('node --eval "Object.defineProperty(process, \'versions\', { value: {} }); require(\'./dist/browser.umd\')"', done);
+  });
+
   it('using schema (gh-7170)', function(done) {
     exec('node --eval "const mongoose = require(\'./lib/browser\'); new mongoose.Schema();"', done);
   });