func (ut Utils) Fatalf(format string, args ...interface{}) {
	ut.Helper()
	ut.Logf(format, args...)
	ut.FailNow()
}
Fatalf is the same as testing.common.Fatalf
package got
import (
	"bytes"
	"context"
	"crypto/rand"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"mime"
	"net"
	"net/http"
	"net/url"
	"os"
	"path/filepath"
	"reflect"
	"strings"
	"sync"
	"time"
)
type Context struct {
	context.Context
	Cancel func()
}
type Utils struct {
	Testable
}
func (ut Utils) Fatal(args ...interface{}) {
	ut.Helper()
	ut.Log(args...)
	ut.FailNow()
}