feat: add ansi codes stripping

lua/neotest-golang/lib/init.lua

@@ -5,5 +5,6 @@ M.cmd = require("neotest-golang.lib.cmd")
 M.find = require("neotest-golang.lib.find")
 M.json = require("neotest-golang.lib.json")
 M.string = require("neotest-golang.lib.string")
+M.strip = require("neotest-golang.lib.strip")
 
 return M

lua/neotest-golang/lib/strip.lua

@@ -0,0 +1,60 @@
+local M = {}
+
+local convert = require("neotest-golang.lib.convert")
+
+-- ANSI escape codes
+M.ESCAPE = convert.to_lua_pattern(string.char(27))
+M.CURSOR_HIDE = convert.to_lua_pattern(string.char(27) .. "[?25l")
+M.CLEAR_SCREEN = convert.to_lua_pattern(string.char(27) .. "[2J")
+M.RESET_ATTRIBUTES = convert.to_lua_pattern(string.char(27) .. "[m")
+M.CURSOR_HOME = convert.to_lua_pattern(string.char(27) .. "[H")
+M.BELL = convert.to_lua_pattern(string.char(7)) -- \a
+
+-- Table of all codes to remove
+M.CODES_TO_REMOVE = {
+  M.ESCAPE .. "%[%d*[%.%d]*[%a%d]*", -- Catches most ANSI sequences
+  M.CURSOR_HIDE,
+  M.CLEAR_SCREEN,
+  M.RESET_ATTRIBUTES,
+  M.CURSOR_HOME,
+  M.BELL,
+  convert.to_lua_pattern("[\0-\31\127]"), -- Control characters
+}
+
+-- Function to clean ANSI codes from a string
+local function cleanString(str)
+  if type(str) ~= "string" then
+    return str
+  end
+
+  for _, code in ipairs(M.CODES_TO_REMOVE) do
+    str = str:gsub(code, "")
+  end
+  return str:gsub("\n$", "") -- Remove trailing newline
+end
+
+-- Function to clean ANSI codes from a table
+function M.cleanTable(tbl)
+  if type(tbl) ~= "table" then
+    return tbl
+  end
+
+  local cleanedTable = {}
+  for i, item in ipairs(tbl) do
+    local cleaned = cleanString(item)
+
+    -- Attempt to parse JSON
+    local success, parsed = pcall(function()
+      return vim.json.decode(cleaned)
+    end)
+
+    if success then
+      cleanedTable[i] = parsed
+    else
+      cleanedTable[i] = cleaned
+    end
+  end
+  return cleanedTable
+end
+
+return M

lua/neotest-golang/process.lua

@@ -80,7 +80,10 @@ function M.test_results(spec, result, tree)
     raw_output = async.fn.readfile(context.test_output_json_filepath)
   end
 
+  local cleaned_table = lib.strip.cleanTable(raw_output)
+  logger.debug({ "Table stripped from ansi codes", cleaned_table })
   local gotest_output = lib.json.decode_from_table(raw_output)
+  logger.debug({ "Table JSON-decoded", gotest_output })
 
   --- The 'go list -json' output, converted into a lua table.
   local golist_output = context.golist_data