I work in a codebase that doesn't have a standard way of naming or locating test files. So I wrote this extension which uses fuzzy search and some other clever stuff to try and locate the matching test/source file and quickly switch to it (and vice versa). Ideally we would just have a standard way to organise and name our files, but this was more fun to make.
If you want to manually select the file to switch to (sometimes the extension will get it wrong) use
The commands are also available in the command pallette under