}

  /**
   * Returns a string containing the supplied {@code char} values separated by {@code separator}.
   * For example, {@code join("-", '1', '2', '3')} returns the string {@code "1-2-3"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)

    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex() throws Exception {
        assertEquals("010203", StringUtil.toHex(new byte[] { 1, 2, 3 }));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex2() throws Exception {
        assertEquals("0001", StringUtil.toHex(1));
    }

    /**

    }

    @Test
    public void hasMoreElements_errorCodeNonZero_returnsFalse() {
        DummyResponse d = new DummyResponse();
        d.setErrorCode(123); // non-zero error
        assertFalse(d.hasMoreElements(), "errorCode non-zero overrides hasMore flag");
    }

    @Test
    public void nextElement_firstCall_flipsIsPrimary() {

	_ = x[ErrObjectLockConfigurationNotAllowed-119]
	_ = x[ErrNoSuchObjectLockConfiguration-120]
	_ = x[ErrObjectLocked-121]
	_ = x[ErrInvalidRetentionDate-122]
	_ = x[ErrPastObjectLockRetainDate-123]
	_ = x[ErrUnknownWORMModeDirective-124]
	_ = x[ErrBucketTaggingNotFound-125]
	_ = x[ErrObjectLockInvalidHeaders-126]
	_ = x[ErrInvalidTagDirective-127]
	_ = x[ErrPolicyAlreadyAttached-128]

### Include a *path operation* { #include-a-path-operation }

We can also add *path operations* directly to the `FastAPI` app.

Here we do it... just to show that we can 🤷:

```Python hl_lines="21-23" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

and it will work correctly, together with all the other *path operations* added with `app.include_router()`.

  }

  public void testGetExitingExecutorService_executorSetToUseDaemonThreads() {
    TestApplication application = new TestApplication();
    ThreadPoolExecutor executor =
        new ThreadPoolExecutor(1, 2, 3, SECONDS, new ArrayBlockingQueue<Runnable>(1));
    assertNotNull(application.getExitingExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

<div style="text-align: right; margin-right: 10%;">Brian Okken - <strong><a href="https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855" target="_blank">Python Bytes</a> podcast host</strong> <a href="https://x.com/brianokken/status/1112220079972728832" target="_blank"><small>(ref)</small></a></div>

---

    void testSerialization() throws Exception {
        // Given
        Map<String, Object> context = new HashMap<>();
        context.put("key1", "value1");
        context.put("key2", 123);

        exception = new SmbOperationException(SmbOperationException.ErrorCode.FILE_NOT_FOUND, "test.txt not found",
                new RuntimeException("cause"), SmbOperationException.RetryPolicy.AGGRESSIVE, context);

    public void test_process_withCustomSessionId() throws Exception {
        // Test that custom sessionId is sanitized
        Crawler.Options options = new Crawler.Options();
        options.sessionId = "test-session-123";

        // Simulate what process() does - sanitize sessionId
        if (options.sessionId != null) {
            options.sessionId = options.sessionId.replaceAll("-", "_");
        }

                  protected Set<String> create(String[] elements) {
                    Iterable<String> rowKeys = ImmutableSet.copyOf(elements);
                    Iterable<Integer> columnKeys = ImmutableList.of(1, 2, 3);
                    Table<String, Integer, Character> table =
                        ArrayTable.create(rowKeys, columnKeys);
                    populateForRowKeySet(table, elements);