vial.nvim

vial.nvim is a Neovim plugin that triggers commands on a separate terminal, primarily designed for running unit tests.

It provides an efficient workflow for developers by automatically running tests on file save and offering various test-related commands.

Features

vial.nvim.mp4

• Automatically runs tests on file save
• Runs the current test if a test is detected under cursor or repeats last test execution
• Customizable for different file types and test commands
• Toggleable automatic test running
• Easy-to-use keybindings for various test-related actions

Installation

Executable

Download the vial executable from the Latest Release.

Using lazy.nvim

{
  'fcoury/vial.nvim',
  config = function()
    require('vial').setup({
      -- your configuration here
    })
  end
}

Using packer.nvim

use {
  'fcoury/vial.nvim',
  config = function()
    require('vial').setup({
      -- your configuration here
    })
  end
}

Configuration

setup Function

The setup function accepts the following options:

• vial_path (string): Path to the vial executable.
• file_types (table): Configuration for different file types. Each key is a file type, and the value is a table with the following keys:
  • command (string): Command to run, where %s will be replaced by the test name.
  • extensions (table): List of file extensions for the file type.
  • extract (function): Function to extract the test name from the current buffer.

Here's an example configuration for Rust files using lsp-config and falling back to regex:

local function get_params()
	local params = vim.lsp.util.make_position_params()
	params.textDocument = vim.lsp.util.make_text_document_params()
	return params
end

local function get_current_test_args()
	local params = get_params()
	local result = vim.lsp.buf_request_sync(0, "experimental/runnables", params, 1000)
	if result and result[1] and result[1].result then
		for _, runnable in ipairs(result[1].result) do
			if runnable.kind == "cargo" and runnable.args.executableArgs then
				local args = runnable.args.executableArgs
				-- Check if this is a specific test
				if #args >= 1 and args[1]:match("^[%w_:]+::[%w_]+$") and runnable.label:match("^test ") then
					return runnable.args
				end
			end
		end
	end
	return nil
end

local function current_test_name_regex()
	-- Get the current buffer and cursor position
	local bufnr = vim.api.nvim_get_current_buf()

	---@diagnostic disable-next-line: deprecated
	local row, _ = unpack(vim.api.nvim_win_get_cursor(0))

	local function_declaration_line = 0
	local function_name = ""

	-- Check lines above the cursor for the #[test] attribute and function definition
	for i = row, 1, -1 do
		local line = vim.api.nvim_buf_get_lines(bufnr, i - 1, i, false)[1]

		-- Check for function start and capture the function name
		if line:match("^%s*fn%s") then
			function_declaration_line = i
			function_name = line:match("^%s*fn%s([%w_]+)%s*%(")
			break
		end
	end

	for i = function_declaration_line, 1, -1 do
		local line = vim.api.nvim_buf_get_lines(bufnr, i - 1, i, false)[1]
		if line:match("^%s*#%[test%]") then
			return function_name
		end
	end

	return nil
end

local function current_rust_test_name()
	local cmd
	if pcall(require, "lspconfig") then
		local args = get_current_test_args()
		if args == nil then
			return nil
		end
		cmd = table.concat(args.cargoArgs, " ") .. " -- " .. table.concat(args.executableArgs, " ")
	else
		local test_name = current_test_name_regex()
		if test_name == nil then
			return nil
		end
		cmd = "test %s -- --nocapture --color=always"
	end

	return cmd
end

return {
	"fcoury/vial.nvim",
	dir = "~/code/vial",
	config = function()
		require("vial").setup({
			vial_path = "/Users/fcoury/code/vial/target/debug/vial",

			file_types = {
				rust = {
					command = "cargo %s",
					extensions = { ".rs" },
					extract = current_rust_test_name,
				},
			},
		})
	end,
}

Adjust the vial_path to point to your vial executable.

Usage

Start the vial server with the vial server command on the terminal you want to use for running your commands.

vial.nvim provides the following keybindings by default:

• <leader>tt: Run the current test
• <leader>tl: Run the last test
• <leader>tc: Clear the last test
• <leader>ta: Toggle automatic test running
• <leader>ts: Show the last test name

Functions

• require('vial').run_test(): Run the current test
• require('vial').run_last_test(): Run the last test
• require('vial').clear_last_test(): Clear the last test
• require('vial').toggle_active(): Toggle automatic test running
• require('vial').show_last_test(): Display the name of the last test

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT License