[🚫 Bug] Wait periods needed to make sure tree items are loaded

Describe the bug

I often seem to need to add wait periods when loading elements, in order to make sure my extension's prjeuct view is loaded and expanded.

For example

 await VSBrowser.instance.openResources(testWorkspacePath);
 await (await new ActivityBar().getViewControl(generalHelpers.TestConstants.VIEW_CONTAINER_TITLE))?.openView();
 // now to initialize the view
 const view = new SideBarView();
 content = view.getContent();
 let tree = await content.getSection("Structure");
 await new Promise(res => setTimeout(res, 300));  <--- I had to add this to make sure the tree was indeed instantiated
 await tree.expand();

I often encounter elements that are created, but I have to artificially add wait periods, so they finish loading their content. I can't use wait(until.elementLocated() since the element is there and can be located, but is not fully loaded

Steps to reproduce

This happens in my extension's project view, so I don't have steps beyond the above

Logs

None. Without the wait period, I get "undefined" when trying to access content of elements not fullly loaded

Operating System

Windows 10

Visual Studio Code

1.89.1

vscode-extension-tester

8.0.2

NodeJS

18.13

npm

8.19.3

redhat-developer / vscode-extension-tester

[🚫 Bug] Wait periods needed to make sure tree items are loaded #1320