fix TSamFailedOnly and the output formatting for the go-runner

lua/test-samurai/runners/go.lua

@@ -201,6 +201,22 @@ function runner.build_file_command(bufnr)
   local spec = { file = path, cwd = root }
   local pkg = build_pkg_arg(spec)
   local cmd = { "go", "test", "-json", pkg }
+  local lines = util.get_buf_lines(bufnr)
+  local funcs = find_test_functions(lines)
+  local names = {}
+  for _, fn in ipairs(funcs) do
+    table.insert(names, fn.name)
+  end
+  names = collect_unique(names)
+  if #names > 0 then
+    local pattern_parts = {}
+    for _, name in ipairs(names) do
+      table.insert(pattern_parts, escape_go_regex(name))
+    end
+    local pattern = "^(" .. table.concat(pattern_parts, "|") .. ")$"
+    table.insert(cmd, "-run")
+    table.insert(cmd, pattern)
+  end
   return {
     cmd = cmd,
     cwd = root,