Hi there,
I wrote a neotest adapter for swift-testing to use in Neovim. Check it out in GitHub.
I developed for Xcode 16, working for my needs so far but feel free to give feedback to help me improve it.
I’ve managed to get this installed with my LazyVim setup (I think) but if I use tt I get this message:
[neotest-swift-testing]|DEBUG|2025-09-02T16:32:52Z+1000|...neotest-swift-testing/lua/neotest-swift-testing/init.lua:433 Position not found: h2hTests.h2hTests/
Is there a place I should be configuring paths or something? If you can help me figure it out, I’d be glad to submit a PR documenting it nicely for others.
Hi Sarah, thanks for providing feedback. Can you provide a sample project for me to reproduce the issue?
Thank you for looking at this, Markus!
I decided to try to find minimal steps to reproduce this and here they are. I’m working on a Vapor project and it turns out their default “hello world” project can reproduce this behaviour for me.
On the command line:
brew install vapor
vapor new hello -n
cd hello
swift build
nvim Tests/helloTests/helloTests.swift
Then in LazyVim I type tT to run all tests, and see the output below:
I’m new to LazyVim (but old enough to have used the original vi extensively), so I may have broken something in my configuration. Given that, I’ve linked to a .tgz file containing my .config/nvim directory contents. I haven’t tried sharing with dropbox before so let me know if it doesn’t work:
https://www.dropbox.com/t/4AZFRviwu9is63YA
Thank you so much for looking into this!
– Sarah
@sarah , do you have treesitter configured for Swift? I believe the neotest-swift-testing plugin uses a Treesitter query for test discovery, so you’d need to configure that in your LazyVim setup.
Here’s an example spec for lazy.nvim:
{
"nvim-treesitter/nvim-treesitter",
branch = 'master',
lazy = false,
build = ":TSUpdate",
opts = {
ensure_installed = { "swift" },
}
},
I’m not super familiar with LazyVim, so you’ll have to refer the distro’s docs for guidance on how to add it. However, best I can tell, Swift isn’t enabled by default: TreeSitter | LazyVim
It rings a bell but I’ll check my configuration to make sure. It might take me a day or so to get back to my personal projects computer but I’ll have the info soon.
Thank you Jerry! I now have tests working (failing yes, but that’s my problem – I can run the tests!)
LazyVim’s website lists tree-sitter and many of its plugins list it as a dependency but I think they use the library not the command line?
I added your suggested configuration into .config/nvim/lua/plugins to ensure LazyVim was loading it and suddenly got different messages, about not finding the tree-sitter command line and then when I installed that about not finding node.
This got it fixed:
brew install tree-sitter-cli
brew install node
Then at last a beautiful sight:
The gutter is showing my tests as failing (which is just environment variable config stuff I can sort out myself, not related to nvim testing).
Thank you so much! Would you like for me to make a PR for your readme listing the steps I needed to get it going in LazyVim?
