initial lua test skeleton

.gitignore

@@ -46,3 +46,4 @@ packages/test-harness/testSubsetGrep.properties
 
 cursorless.nvim/node/cursorless-neovim
 cursorless.nvim/node/test-harness
+cursorless.nvim/test/xdg/

cursorless.nvim/.busted

@@ -0,0 +1,8 @@
+return {
+    _all = {
+        lua = './test/nvim-shim.sh'
+    },
+    unit = {
+        ROOT = {'./test/unit/'},
+    },
+}

cursorless.nvim/lua/cursorless/cursorless.lua

@@ -122,15 +122,11 @@ function M.buffer_get_selection_text()
 end
 
 -- https://github.com/nvim-treesitter/nvim-treesitter/blob/master/lua/nvim-treesitter/ts_utils.lua#L278
--- luacheck:ignore 631
--- https://github.com/nvim-treesitter/nvim-treesitter-textobjects/blob/master/lua/nvim-treesitter/textobjects/select.lua#L114
--- as an example if you put that in a vim buffer and do the following you can do a selection:
--- :w c:\work\tmp\test.lua
--- :so %
--- :lua select_range(5, 12, 5, 30)
--- for example it will highlight the last function name (nvim_win_set_cursor).
--- another example is :tmap <c-b> <Cmd>lua require("talon.cursorless").select_range(4, 0, 4, 38)<Cr>
+-- If you have a buffer with the line: "hello world"
+-- :lua require("cursorless.cursorless").select_range(1, 2, 1, 4)
+-- will highlight "llo"
 -- NOTE: works for any mode (n,i,v,nt) except in t mode
+-- luacheck:ignore 631
 function M.select_range(start_x, start_y, end_x, end_y)
   vim.cmd([[normal! :noh]])
   vim.api.nvim_win_set_cursor(0, { start_x, start_y })

cursorless.nvim/test/nvim-shim.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+export XDG_CONFIG_HOME='test/xdg/config/'
+export XDG_STATE_HOME='test/xdg/local/state/'
+export XDG_DATA_HOME='test/xdg/local/share/'
+
+# FIXME: For the flake.nix devshell I plan to eventually just install the unwrapped binary straight up so I can
+# reference it for these tests, but until then...
+function resolve_nvim_path() {
+  nvim=$(type -p "nvim" | awk '{print $NF}')
+  if file "${nvim}" | grep -q 'executable'; then
+    echo "${nvim}"
+    return
+  fi
+
+  # On NixOS, this might still be a wrapper, so we need to make sure we find the real binary
+  current_link="${nvim}"
+  while [ -L "${current_link}" ]; do
+    current_link=$(readlink "${current_link}")
+  done
+  nvim="${current_link}"
+
+  if file "${current_link}" | grep -q 'script'; then
+    nvim=$(grep 'exec -a' "${current_link}" | cut -f4 -d" " | tr -d '"')
+  fi
+  echo "${nvim}"
+}
+
+mkdir -p ${XDG_CONFIG_HOME} ${XDG_STATE_HOME} ${XDG_DATA_HOME}
+mkdir -p ${XDG_DATA_HOME}/nvim/site/pack/testing/start || true
+link_path="${XDG_DATA_HOME}/nvim/site/pack/testing/start/cursorless.nvim"
+if [ ! -e "${link_path}" ]; then
+  # FIXME: Expects to be in cursorless.nvim, so we should force cd here?
+  ln -sf "${PWD}" ${link_path}
+fi
+
+NVIM=$(resolve_nvim_path)
+
+# shellcheck disable=SC2068
+${NVIM} --cmd 'set loadplugins' -l $@
+exit_code=$?
+rm ${link_path} 2>/dev/null || true
+
+exit $exit_code

cursorless.nvim/test/unit/cursorless_spec.lua

@@ -0,0 +1,95 @@
+describe("cursorless tests", function()
+  local cursorless = require("cursorless.cursorless")
+
+  local get_selected_text = function()
+    local _, ls, cs = unpack(vim.fn.getpos("v"))
+    local _, le, ce = unpack(vim.fn.getpos("."))
+    return vim.api.nvim_buf_get_text(0, ls - 1, cs - 1, le - 1, ce, {})
+  end
+
+  local function convert_table_entries(tbl, func)
+    local mapped = {}
+    for k, v in pairs(tbl) do
+      mapped[k] = func(v)
+    end
+    return mapped
+  end
+
+  describe("window_get_visible_lines()", function()
+    before_each(function() end)
+
+    it("Can read one visible line", function()
+      local pos = vim.api.nvim_win_get_cursor(0)[2]
+      local line = vim.api.nvim_get_current_line()
+      local nline = line:sub(0, pos) .. "hello" .. line:sub(pos + 1)
+      vim.api.nvim_set_current_line(nline)
+
+      local visible = cursorless.window_get_visible_lines()
+      assert(table.concat(visible) == table.concat({ 1, 1 }))
+    end)
+
+    it("Can read all lines visible on the window", function()
+      local maxlines = vim.api.nvim_win_get_height(0)
+      local lines = {}
+      for _ = 1, (maxlines + 1) do
+        table.insert(lines, "hello ")
+      end
+      vim.api.nvim_buf_set_lines(0, 0, -1, false, lines)
+      local visible = cursorless.window_get_visible_lines()
+      assert(table.concat(visible) == table.concat({ 1, maxlines }))
+    end)
+  end)
+  describe("select_range()", function()
+    it("Selects the specified range", function()
+      local lines = "hello world"
+      vim.api.nvim_buf_set_lines(0, 0, -1, false, vim.split(lines, "\n"))
+      cursorless.select_range(1, 2, 1, 4)
+
+      assert(table.concat(get_selected_text()) == "llo")
+    end)
+  end)
+  describe("buffer_get_selection()", function()
+    it(
+      "Can get the forward selection in a format expected by cursorless",
+      function()
+        local lines = "hello world"
+        vim.api.nvim_buf_set_lines(0, 0, -1, false, vim.split(lines, "\n"))
+        cursorless.select_range(1, 2, 1, 4)
+        assert(
+          table.concat(
+            convert_table_entries(cursorless.buffer_get_selection(), tostring),
+            ", "
+          )
+            == table.concat(
+              convert_table_entries({ 1, 3, 1, 5, false }, tostring),
+              ", "
+            )
+        )
+      end
+    )
+    it(
+      "Can get the backward selection in a format expected by cursorless",
+      function()
+        local lines = "hello world"
+        vim.api.nvim_buf_set_lines(0, 0, -1, false, vim.split(lines, "\n"))
+        cursorless.select_range(1, 4, 1, 2)
+        print(
+          table.concat(
+            convert_table_entries(cursorless.buffer_get_selection(), tostring),
+            ", "
+          )
+        )
+        assert(
+          table.concat(
+            convert_table_entries(cursorless.buffer_get_selection(), tostring),
+            ", "
+          )
+            == table.concat(
+              convert_table_entries({ 1, 3, 1, 5, true }, tostring),
+              ", "
+            )
+        )
+      end
+    )
+  end)
+end)

docs/contributing/cursorless-in-neovim.md

@@ -12,7 +12,7 @@ Follow the steps in [CONTRIBUTING.md](./CONTRIBUTING.md#initial-setup).
 
 Follow the installation steps in [cursorless.nvim](https://github.com/hands-free-vim/cursorless.nvim/tree/main#prerequisites).
 
-Confirm that production cursorless.nvim is working in neovim, eg say `"take first paint"` in a nonempty document.
+Confirm that production cursorless.nvim is working in neovim, eg say `"take first paint"` in a non-empty document.
 
 ### 3. Add nvim executable path to your PATH
 
@@ -40,7 +40,13 @@ In order to test out your local version of the extension or to run unit tests lo
 
 The debug logs are written in `C:\path\to\cursorless\packages\cursorless-neovim\out\nvim_node.log`.
 
-NOTE: This will spawn a standalone nvim instance that is independent of VSCode. Consequently after you're done debugging, you need to close nvim.
+NOTE: This will spawn a standalone nvim instance that is independent of VSCode. Consequently after you're done
+debugging, you need to close nvim.
+
+### Running lua tests
+
+Their are separate cursorless and lua tests. You can run the lua tests by entering the `cursorless.nvim` folder and
+running: `busted --run unit`. These tests currently only work on Linux.
 
 ## Sending pull requests