// Test with very large strings
        StringBuilder largeString = new StringBuilder();
        for (int i = 0; i < 10000; i++) {
            largeString.append("x");
        }
        OptionalEntity<String> largeStringOpt = OptionalUtil.ofNullable(largeString.toString());
        assertTrue(largeStringOpt.isPresent());
        assertEquals(10000, largeStringOpt.get().length());

    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertThat(builder.toString()).isEqualTo(expected);
  }

  static final CharSource BROKEN_READ_SOURCE = new TestCharSource("ABC", READ_THROWS);

Здесь функция-обработчик события `shutdown` запишет строку текста `"Application shutdown"` в файл `log.txt`.

/// info | Информация

В функции `open()` параметр `mode="a"` означает «добавление» (append), то есть строка будет добавлена в конец файла, без перезаписи предыдущего содержимого.

///

/// tip | Совет

		Bucket:          rs.Bucket,
		Object:          rs.Object,
		NumBuckets:      int64(rs.TotBuckets),
	}
	for b, st := range rs.BucketStatuses {
		if st == ResyncFailed {
			m.FailedBuckets = append(m.FailedBuckets, b)
		}
	}
	return &m
}

// save in-memory stats to disk
func (sm *siteResyncMetrics) save(ctx context.Context) {
	sTimer := time.NewTimer(siteResyncSaveInterval)
	defer sTimer.Stop()

        int outlen = 5;
        byte[] expanded = PacMac.expandNFold(data, outlen);
        assertNotNull(expanded);
        assertEquals(outlen, expanded.length);

        // Test vectors from RFC 3961 Appendix A.1
        // 64-fold("012345")
        verifyNfold("012345", 8,
                new byte[] { (byte) 0xbe, (byte) 0x07, (byte) 0x26, (byte) 0x31, (byte) 0x27, (byte) 0x6b, (byte) 0x19, (byte) 0x55 });

        // Create a very long filename (but within reasonable bounds)
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 255; i++) {
            sb.append('A');
        }
        String longFileName = sb.toString();

        byte[] buffer = createValidNotificationBuffer(longFileName, FileNotifyInformation.FILE_ACTION_ADDED);

func erasureSelfTest() {
	// Approx runtime ~1ms
	var testConfigs [][2]uint8
	for total := uint8(4); total < 16; total++ {
		for data := total / 2; data < total; data++ {
			parity := total - data
			testConfigs = append(testConfigs, [2]uint8{data, parity})
		}
	}
	got := make(map[[2]uint8]map[ErasureAlgo]uint64, len(testConfigs))
	// Copied from output of fmt.Printf("%#v", got) at the end.

)

// TestMain initializes the testing framework
func TestMain(m *testing.M) {
	startLockServers()

	// Initialize locker clients for dsync.
	var clnts []NetLocker
	for i := range nodes {
		clnts = append(clnts, newClient(nodes[i].URL))
	}

	ds = &Dsync{
		GetLockers: func() ([]NetLocker, string) { return clnts, uuid.New().String() },
		Timeouts: Timeouts{
			Acquire:         testDrwMutexAcquireTimeout,

   *     argument. These are matched by position - the first {@code %s} gets {@code
   *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
   *     square braces. Unmatched placeholders will be left as-is.
   * @param errorMessageArgs the arguments to be substituted into the message template. Arguments

        DomUtils.insertContentElement(root, "customElement", "custom value");

        String xmlOutput = DomUtils.toXml(doc);

        int versionIndex = xmlOutput.indexOf("<version>");
        int customElementIndex = xmlOutput.indexOf("<customElement>");

        // Custom element should be appended at the end