func (w *Writer) Close() error {
	if w.err != nil {
		if w.err == errClosed {
			return nil
		}
		return w.err
	}
	// Make any future calls to Write return errClosed.
	w.err = errClosed
	// Write the savedCode if valid.
	if w.savedCode != invalidCode {
		if err := w.write(w, w.savedCode); err != nil {
			return err
		}
		if err := w.incHi(); err != nil && err != errOutOfCodes {
			return err
		}

func TestFowler(t *testing.T) {
	files, err := filepath.Glob("testdata/*.dat")
	if err != nil {
		t.Fatal(err)
	}
	for _, file := range files {
		t.Log(file)
		testFowler(t, file)
	}
}

var notab = MustCompilePOSIX(`[^\t]+`)

func testFowler(t *testing.T, file string) {
	f, err := os.Open(file)
	if err != nil {
		t.Error(err)
		return
	}
	defer f.Close()

	if err != nil {
		t.Fatal("encode:", err)
	}
	dec := NewDecoder(b)
	err2 := fmt.Errorf("foo")
	err = dec.Decode(&err2)
	if err != nil {
		t.Fatal("decode:", err)
	}
	if err2 != nil {
		t.Fatalf("expected nil, got %v", err2)
	}
}

func TestNetIP(t *testing.T) {
	// Encoding of net.IP{1,2,3,4} in Go 1.1.
	enc := []byte{0x07, 0x0a, 0x00, 0x04, 0x01, 0x02, 0x03, 0x04}

	var ip net.IP

		t.Run(tt.desc, func(t *testing.T) {
			ispec := &v1alpha1.IstioOperatorSpec{}
			err := util.UnmarshalWithJSONPB(tt.yamlStr, ispec, false)
			if err != nil {
				t.Fatalf("unmarshalWithJSONPB(%s): got error %s", tt.desc, err)
			}

			errs := CheckIstioOperatorSpec(ispec, false)
			if gotErrs, wantErrs := errs, tt.wantErrs; !util.EqualErrors(gotErrs, wantErrs) {

		}
		key, value, _ := strings.Cut(key, "=")
		key, err1 := QueryUnescape(key)
		if err1 != nil {
			if err == nil {
				err = err1
			}
			continue
		}
		value, err1 = QueryUnescape(value)
		if err1 != nil {
			if err == nil {
				err = err1
			}
			continue
		}
		m[key] = append(m[key], value)
	}
	return err
}

// Encode encodes the values into “URL encoded” form

		t.Run(testcase.name, func(t *testing.T) {
			errs := testcase.testOptions.Validate()
			if len(testcase.expectErr) != 0 && !strings.Contains(utilerrors.NewAggregate(errs).Error(), testcase.expectErr) {
				t.Errorf("got err: %v, expected err: %s", errs, testcase.expectErr)
			}
			if len(testcase.expectErr) == 0 && len(errs) != 0 {
				t.Errorf("got err: %s, expected err nil", errs)
			}
		})
	}
}

	if len(content) > 0 {
		n, err := r.Read(nil)
		if n != 0 || err != nil {
			return fmt.Errorf("Read(0) = %d, %v, want 0, nil", n, err)
		}
	}

	data, err := io.ReadAll(&smallByteReader{r: r})
	if err != nil {
		return err
	}
	if !bytes.Equal(data, content) {
		return fmt.Errorf("ReadAll(small amounts) = %q\n\twant %q", data, content)
	}
	n, err := r.Read(make([]byte, 10))

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	nDisks := 16
	disks, err := getRandomDisks(nDisks)
	if err != nil {
		t.Fatal(err)
	}
	objLayer, _, err := initObjectLayer(ctx, mustGetPoolEndpoints(0, disks...))
	if err != nil {
		removeRoots(disks)
		t.Fatal(err)
	}
	defer removeRoots(disks)
	z := objLayer.(*erasureServerPools)
	testShuffleDisks(t, z)
}

	})
	if err != ErrWaitTimeout || i != opts.Steps {
		t.Errorf("unexpected error: %v", err)
	}

	// returns immediately
	i = 0
	err = ExponentialBackoff(opts, func() (bool, error) {
		i++
		return true, nil
	})
	if err != nil || i != 1 {
		t.Errorf("unexpected error: %v", err)
	}

	// returns immediately on error
	testErr := fmt.Errorf("some other error")
	err = ExponentialBackoff(opts, func() (bool, error) {

		}
	}
}

func writeFile(filename string, data []byte) error {
	f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE, 0666)
	if err != nil {
		return err
	}
	n, err := f.Write(data)
	if err == nil && n < len(data) {
		err = io.ErrShortWrite
	}
	if err1 := f.Close(); err == nil {
		err = err1
	}
	return err
}

func changeFileName(dir, from, to string, t *testing.T) {