feat(summary): mappings help window

Co-authored-by: Rónán Carrigan <[email protected]>

lua/neotest/config/init.lua

@@ -233,6 +233,7 @@ local default_config = {
       next_failed = "J",
       prev_failed = "K",
       watch = "w",
+      help = "?",
     },
   },
   benchmark = {

lua/neotest/consumers/summary/component.lua

@@ -233,6 +233,38 @@ function SummaryComponent:_render(canvas, tree, expanded, focused, indent)
       neotest.summary.clear_marked({ adapter = self.adapter_id })
     end)
 
+    canvas:add_mapping(
+      "help",
+      async_func(function()
+        local help_text = {}
+        local width = 0
+        for name, mapping in pairs(config.summary.mappings) do
+          local mappings = type(mapping) == "table" and table.concat(mapping, ", ") or mapping
+          local line = "(" .. name .. "): " .. mappings
+          width = math.max(width, #line)
+          table.insert(help_text, line)
+        end
+
+        table.insert(help_text, 1, "Mappings")
+        width = math.max(width, #help_text[1])
+        table.insert(help_text, 2, string.rep("=", width))
+
+        local buf = vim.api.nvim_create_buf(false, true)
+        vim.api.nvim_buf_set_lines(buf, 0, -1, false, help_text)
+        vim.api.nvim_buf_set_option(buf, "modifiable", false)
+        local float = lib.ui.float.open({
+          width = width,
+          height = #help_text,
+          buffer = buf,
+          auto_close = true,
+        })
+        local win = float.win_id
+        vim.api.nvim_win_set_buf(win, buf)
+        vim.api.nvim_set_current_win(win)
+        vim.api.nvim_buf_set_keymap(buf, "n", "q", "<cmd>q<CR>", { noremap = true, silent = true })
+      end)
+    )
+
     local status = self:_get_status(position)
     has_running = has_running or status == "running"