}

    /**
     * Test that the constant-time comparison method is actually used internally.
     */
    @Test
    public void testConstantTimeMethodExists() throws Exception {
        // Use reflection to verify the constant-time method exists
        Method constantTimeMethod = NtlmPasswordAuthenticator.class.getDeclaredMethod("constantTimeEquals", char[].class, char[].class);

# Classes as Dependencies { #classes-as-dependencies }

Before diving deeper into the **Dependency Injection** system, let's upgrade the previous example.

## A `dict` from the previous example { #a-dict-from-the-previous-example }

In the previous example, we were returning a `dict` from our dependency ("dependable"):

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[9] *}

  }

  /**
   * Provides a check of whether an exception type is valid for use with {@link
   * FuturesGetChecked#getChecked(Future, Class)}, possibly using caching.
   *
   * <p>Uses reflection to gracefully fall back to when certain implementations aren't available.
   */
  private static final class GetCheckedTypeValidatorHolder {
    static final GetCheckedTypeValidator BEST_VALIDATOR = getBestValidator();

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateArrayBounds(src, 0, dst, 50, 60));
    }

    @ParameterizedTest
    @DisplayName("Test path traversal detection")
    @ValueSource(strings = { "../etc/passwd", "..\\windows\\system32", "folder/../../../etc", "test/../../root", "..\\..\\..\\windows" })
    void testPathTraversal(String path) {

        /*
         * The kerberos session key is not accessible via the JGSS API. IBM and
         * Oracle both implement a similar API to make an ExtendedGSSContext
         * available. That API is accessed via reflection to make this independent
         * of the runtime JRE
         */
        if (EXT_GSS_CONTEXT_CLASS == null || INQUIRE_SEC_CONTEXT == null || INQUIRE_TYPE_SESSION_KEY == null) {

        assertInstanceOf(SmbShareInfo.class, entries[1]);
        assertEquals("normal_share", entries[1].getName());
        assertEquals(8, entries[1].getType());
    }

    // Helper method to set DfsEnumArray using reflection
    private void setDfsEnumArray(MsrpcDfsRootEnum target, netdfs.DfsEnumArray200 array) throws Exception {
        Field eField = netdfs.DfsEnumStruct.class.getDeclaredField("e");
        eField.setAccessible(true);

  when {
    this.isEmpty() -> emptyList()
    this.size == 1 -> Collections.singletonList(this[0])
    // Collection.toArray returns Object[] (covariant).
    // It is faster than creating real T[] via reflection (Arrays.copyOf).
    else -> (this as java.util.Collection<*>).toArray().asList().unmodifiable() as List<T>
  }

/** Returns an immutable list containing [elements]. */
@SafeVarargs

        // With filter, resource should be closed due to try-with-resources
        verify(filter).accept(resource);
        verify(resource).close();
    }

    @Test
    @DisplayName("Iterator with rejecting filter - finds next acceptable")
    void iteratorWithRejectingFilter() throws Exception {
        // Setup: first entry rejected, second accepted
        FileEntry entry1 = mock(FileEntry.class);

        buffer.putShort((short) 0); // AceCount
        buffer.putShort((short) 0); // Padding

        return buffer.array();
    }

    /**
     * Helper method to set error code using reflection
     */
    private void setErrorCode(NtTransQuerySecurityDescResponse response, int errorCode) throws Exception {
        // Navigate through the inheritance hierarchy to find the errorCode field

    private NullsBeforeTwo() {
      super("two"); // from TestStringSortedMapGenerator's sample keys
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getMethod(Class<?> clazz, String name) {
    try {
      return clazz.getMethod(name);
    } catch (Exception e) {
      throw new IllegalArgumentException(e);
    }
  }