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: gcexportdata_test.go
    path of file: ./repos/gitkube/vendor/golang.org/x/tools/go/gcexportdata
    
    the code of the file until where you have to start completion: package gcexportdata_test

import (
	"go/token"
	"go/types"
	"log"
	"os"
	"testing"

	"golang.org/x/tools/go/gcexportdata"
)

// Test to ensure that gcexportdata 
    
func TestAppEngine16(t *testing.T) {
	// Open and read the file.
	f, err := os.Open("testdata/errors-ae16.a")
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()
	r, err := gcexportdata.NewReader(f)
	if err != nil {
		log.Fatalf("reading export data: %v", err)
	}

	// Decode the export data.
	fset := token.NewFileSet()
	imports := make(map[string]*types.Package)
	pkg, err := gcexportdata.Read(r, fset, imports, "errors")
	if err != nil {
		log.Fatal(err)
	}

	// Print package information.
	got := pkg.Scope().Lookup("New").Type().String()
	want := "func(text string) error"
	if got != want {
		t.Errorf("New.Type = %s, want %s", got, want)
	}
}