test: fix flakey tests, remove test for #9597 because it affects global state and fails intermittently on deno

Author: vkarpov15

test/collection.capped.test.js

@@ -46,6 +46,7 @@ describe('collections: capped:', function() {
     capped.set('capped', { size: 1000 });
     const Capped = db.model('Test', capped, 'Test');
     await Capped.init();
+    await Capped.createCollection();
     await new Promise((resolve) => setTimeout(resolve, 100));
 
     const isCapped = await Capped.collection.isCapped();

test/connection.test.js

@@ -1011,21 +1011,6 @@ describe('connections:', function() {
     assert.throws(() => m.model('Test', Schema({ name: String })), /overwrite/);
   });
 
-  it('can use destructured `connect` and `disconnect` (gh-9597)', async function() {
-    const m = new mongoose.Mongoose();
-    const connect = m.connect;
-    const disconnect = m.disconnect;
-
-    await disconnect();
-    await new Promise((resolve) => setTimeout(resolve, 0));
-
-    const errorOnConnect = await connect(start.uri).then(() => null, err => err);
-    assert.ifError(errorOnConnect);
-
-    const errorOnDisconnect = await disconnect().then(() => null, err => err);
-    assert.ifError(errorOnDisconnect);
-  });
-
   describe('when connecting with a secondary read preference(gh-9374)', function() {
     describe('mongoose.connect', function() {
       it('forces autoIndex & autoCreate to be false if read preference is secondary or secondaryPreferred', async function() {