var testString string // test data for write tests
var testBytes []byte  // test data; same as testString but as a slice.

type negativeReader struct{}

func (r *negativeReader) Read([]byte) (int, error) { return -1, nil }

func init() {
	testBytes = make([]byte, N)
	for i := 0; i < N; i++ {
		testBytes[i] = 'a' + byte(i%26)
	}
	testString = string(testBytes)
}

// Verify that contents of buf match the string s.

	if err != nil {
		t.Fatalf("unable to create temp file")
	}
	defer os.Remove(file.Name())

	line := strings.Repeat("a", blockSize)
	testBytes := []byte(line + "\n" +
		line + "\n" +
		line + "\n" +
		line + "\n" +
		line[blockSize/2:]) // incomplete line

	file.Write(testBytes)
	testCases := []struct {
		name          string
		max           int64
		longerThanMax bool
		expected      string
	}{
		{

  @GwtIncompatible // java.nio.charset.Charset
  public void testIsWellFormed_1Byte() {
    testBytes(1, EXPECTED_ONE_BYTE_ROUNDTRIPPABLE_COUNT);
  }

  /** Tests that round tripping of all two byte permutations work. */
  @GwtIncompatible // java.nio.charset.Charset
  public void testIsWellFormed_2Bytes() {
    testBytes(2, EXPECTED_TWO_BYTE_ROUNDTRIPPABLE_COUNT);
  }

	// trim leading zero bytes since Bytes() won't return them
	// (was issue 12231)
	for len(b) > 0 && b[0] == 0 {
		b = b[1:]
	}
	b2 := new(Int).SetBytes(b).Bytes()
	return bytes.Equal(b, b2)
}

func TestBytes(t *testing.T) {
	if err := quick.Check(checkBytes, nil); err != nil {
		t.Error(err)
	}
}

func checkQuo(x, y []byte) bool {
	u := new(Int).SetBytes(x)
	v := new(Int).SetBytes(y)

	for _, tt := range tagGetTests {
		if v := tt.Tag.Get(tt.Key); v != tt.Value {
			t.Errorf("StructTag(%#q).Get(%#q) = %#q, want %#q", tt.Tag, tt.Key, v, tt.Value)
		}
	}
}

func TestBytes(t *testing.T) {
	shouldPanic("on int Value", func() { ValueOf(0).Bytes() })
	shouldPanic("of non-byte slice", func() { ValueOf([]string{}).Bytes() })

	type S []byte
	x := S{1, 2, 3, 4}