refactor: improve async operation handling in tests and enhance error handling in MongoDB wrapper

packages/mongo/tests/mongo_livedata_tests.js

@@ -4298,9 +4298,10 @@ Tinytest.addAsync(
     await Collection.updateAsync({ _id: 'a' }, { $set: { num: 1 } });
     await Collection.updateAsync({ _id: 'b' }, { $set: { num: 2 } });
 
+    if(Meteor.isClient) Meteor._sleepForMs(100); // wait for async operations to complete 
     items = await Collection.find().fetchAsync();
     itemIds = items.map(_item => _item.num);
-
+    
     test.equal(itemIds, [1, 2]);
 
     await Collection.removeAsync({ _id: 'a' });

packages/npm-mongo/wrapper.js

@@ -19,8 +19,6 @@ function connect(client) {
 
 if (process.env.MONGO_URL && (/^mongodb(\+srv)?:\/\//.test(process.env.MONGO_URL))) {
   try {
-    // Try to parse the connection string to check if it's valid
-    new URL(process.env.MONGO_URL);
     connect(new MongoClient(process.env.MONGO_URL)).then(client => {
       if (client) client.close();
     });
@@ -33,7 +31,7 @@ const useLegacyMongo = !!Package['npm-mongo-legacy']
 const oldNoDeprecationValue = process.noDeprecation;
 
 useLegacyMongo && console.log('WARN: npm-mongo-legacy package detected, using package for mongo <= 3.6');
-
+console.log('useLegacyMongo', useLegacyMongo);
 try {
   // Silence deprecation warnings introduced in a patch update to mongodb:
   // https://github.com/meteor/meteor/pull/9942#discussion_r218564879

packages/tinytest/tinytest.js

@@ -74,7 +74,7 @@ export class TestCaseResults {
         var frame = stack[i];
         // Heuristic: use the OUTERMOST line which is in a :tests.js
         // file (this is less likely to be a test helper function).
-        const fileName = frame.getFileName();
+        const fileName = frame?.getFileName ? frame.getFileName() : null;
         if (fileName && fileName.match(/:tests\.js/)) {
           doc.filename = fileName;
           doc.line = frame.getLineNumber();