How to use the VSCode debugger when testing a Solana Anchor program

Question

Is there a way to use the VSCode debugger on a Solana Anchor program. For instance how could I add a breakpoint and stop execution on line 6 of the Tic-Tac-Toe program whenever I run the JS tests.

I have followed these steps:

• Installed LLDB and rust-analyzer extensions in VSCode.
• Created a launch.json file with following content:

   {
       "version": "0.2.0",
       "configurations": [
           {
               "type": "lldb",
               "request": "launch",
               "name": "Debug unit tests in library 'tic-tac-toe'",
               "cargo": {
                   "args": [
                       "test",
                       "--package=tic-tac-toe"
                   ],
                   "filter": {
                       "name": "tic-tac-toe",
                       "kind": "lib"
                   }
               },
               "args": [],
               "cwd": "${workspaceFolder}"
           }
       ]
   }
  

But this seems to execute cargo test instead of anchor test. How can I configure the debugger to work with anchor test?

Answer 1

Not that I know of. I do most of my debugging with the msg! macro and then inspect the program logs. See also this helpful Gist: https://gist.github.com/briangershon/89dfe197941c0abbd26db991ce350ce5