Add keybindings for neotest

The summary is a little bit strange for now, but it'll get better as
neotest improves. The main problem is that it opens the help window in a
buffer that needs to be :q'd before it goes away.

Author: TheDDMbassy

lua/plugins/testing.lua

@@ -5,5 +5,41 @@ return {
     'nvim-lua/plenary.nvim',
     'antoinemadec/FixCursorHold.nvim',
     'nvim-treesitter/nvim-treesitter',
+    'jfpedroza/neotest-elixir',
+    'zidhuss/neotest-minitest',
   },
+  config = function()
+    require('neotest').setup {
+      adapters = {
+        require 'neotest-elixir',
+        require 'neotest-minitest',
+      },
+    }
+
+    local map = function(keys, func, desc, mode)
+      mode = mode or 'n'
+      vim.keymap.set(mode, keys, func, { desc = desc })
+    end
+
+    local cmd_prefix = ':lua require("neotest")'
+    local run_prefix = cmd_prefix .. '.run'
+    local out_prefix = cmd_prefix .. '.output'
+    local sum_prefix = cmd_prefix .. '.summary'
+    local jump_prefix = cmd_prefix .. '.jump'
+
+    -- Test Running Keybindings
+    map('<leader>tl', run_prefix .. '.run()<CR>', 'Neo[T]est: [l]aunch/run test')
+    map('<leader>tx', run_prefix .. '.stop()<CR>', 'Neo[T]est: Stop test (i.e. click "[X]")')
+    map('<leader>ta', run_prefix .. '.run(vim.fn.expand("%"))<CR>', 'Neo[T]est: Run [a]ll tests in the file')
+
+    map('<leader>ti', out_prefix .. '.open()<CR>', 'Neo[T]est: [i]nspect output in hover mode')
+    map('<leader>to', out_prefix .. '.open({enter = true})<CR>', 'Neo[T]est: [o]pen output in copy mode')
+    map('<leader>tp', cmd_prefix .. '.output_panel.toggle()', 'Neo[T]est: Toggle output [p]anel')
+    map('<leader>tc', cmd_prefix .. '.output_panel.clear()', 'Neo[T]est: [C]lear output panel')
+
+    map('<leader>ts', sum_prefix .. '.toggle()<CR>', 'Neo[T]est: Toggle [s]ummary')
+
+    map('<leader>tn', jump_prefix .. '.next({ status = "failed" })<CR>', 'Neo[T]est: Jump to [n]ext failed test')
+    map('<leader>tN', jump_prefix .. '.prev({ status = "failed" })<CR>', 'Neo[T]est: Jump to [p]revious failed test')
+  end,
 }

lua/plugins/which-key.lua

@@ -60,7 +60,7 @@ return { -- Useful plugin to show you pending keybinds.
       { '<leader>s', group = '[S]earch & [S]ort' },
       { '<leader>si', group = '[S]ort [i]nside character pair' },
       { '<leader>sI', group = 'Reverse [S]ort [I]nside character pair' },
-      { '<leader>t', group = '[T]oggle' },
+      { '<leader>t', group = '[T]est & [T]oggle' },
       { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
     },
   },