You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: errorcodes_test.go
    path of file: ./repos/gccrs/libgo/go/go/types
    
    the code of the file until where you have to start completion: // Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package types_test

import (
	"fmt"
	"go/ast"
	"go/constant"
	"go/importer"
	"go/parser"
	"go/token"
	"reflect"
	"strings"
	"testing"

	. "go/types"
)

func TestErrorCodeExamples(t *testing.T) {
	walkCodes(t, func(name string, value int, spec *ast.ValueSpec) {
		t.Run(name, func(t *testing.T) {
			doc := spec.Doc.Text()
			examples := strings.Split(doc, "Example:")
			for i := 1; 
    
func walkCodes(t *testing.T, f func(string, int, *ast.ValueSpec)) {
	t.Skip("skipping for gccgo: importer does not work")

	t.Helper()
	fset := token.NewFileSet()
	files, err := pkgFiles(fset, ".", parser.ParseComments) // from self_test.go
	if err != nil {
		t.Fatal(err)
	}
	conf := Config{Importer: importer.Default()}
	info := &Info{
		Types: make(map[ast.Expr]TypeAndValue),
		Defs:  make(map[*ast.Ident]Object),
		Uses:  make(map[*ast.Ident]Object),
	}
	_, err = conf.Check("types", fset, files, info)
	if err != nil {
		t.Fatal(err)
	}
	for _, file := range files {
		for _, decl := range file.Decls {
			decl, ok := decl.(*ast.GenDecl)
			if !ok || decl.Tok != token.CONST {
				continue
			}
			for _, spec := range decl.Specs {
				spec, ok := spec.(*ast.ValueSpec)
				if !ok || len(spec.Names) == 0 {
					continue
				}
				obj := info.ObjectOf(spec.Names[0])
				if named, ok := obj.Type().(*Named); ok && named.Obj().Name() == "errorCode" {
					if len(spec.Names) != 1 {
						t.Fatalf("bad Code declaration for %q: got %d names, want exactly 1", spec.Names[0].Name, len(spec.Names))
					}
					codename := spec.Names[0].Name
					value := int(constant.Val(obj.(*Const).Val()).(int64))
					f(codename, value, spec)
				}
			}
		}
	}
}