help: floating help box with dynamic keybinding content

tests/test_help.lua

@@ -0,0 +1,40 @@
+-- tests for help box
+local help = require("tiny-debugger.help")
+local config = require("tiny-debugger.config")
+
+local function assert_eq(a, b, msg)
+  if a ~= b then
+    error(string.format("FAIL: %s — expected %s, got %s", msg, vim.inspect(b), vim.inspect(a)))
+  end
+end
+
+-- test 1: open creates a valid window
+help.open()
+assert_eq(help.is_open(), true, "help window is open")
+
+-- test 2: close removes the window
+help.close()
+assert_eq(help.is_open(), false, "help window is closed")
+
+-- test 3: remapped key shows in help content
+config.merge({ keys = { continue = "g" } })
+help.open()
+-- read the buffer content
+local wins = vim.api.nvim_list_wins()
+local found_g = false
+for _, w in ipairs(wins) do
+  local buf = vim.api.nvim_win_get_buf(w)
+  local lines = vim.api.nvim_buf_get_lines(buf, 0, -1, false)
+  for _, line in ipairs(lines) do
+    if line:find("g%s+Continue") then
+      found_g = true
+    end
+  end
+end
+assert_eq(found_g, true, "remapped key 'g' appears in help")
+help.close()
+
+-- reset config
+config.merge({})
+
+print("ALL HELP TESTS PASSED")