SmbFileHandleImpl fh = target.ensureOpen();
        assertSame(fileHandle, fh);
        assertTrue(target.isOpen());
        assertFalse(target.isStale());

        // If handle becomes invalid, reflect stale
        when(fileHandle.isValid()).thenReturn(false);
        assertFalse(target.isOpen());
        assertTrue(target.isStale());
    }

    @Test

        // Test with an invalid Kerberos version
        byte[] invalidVersionToken = createTestTicketBytes(99, SERVER_REALM, SERVER_PRINCIPAL_NAME, ENCRYPTION_TYPE, ENCRYPTED_DATA, null);
        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new KerberosTicket(invalidVersionToken, (byte) 0, keys));
        assertTrue(e.getMessage().startsWith("Invalid kerberos version"));
    }

    @Test

     * @return a new {@link DependencyCoordinates} object
     *
     * @throws IllegalArgumentException if {@code request} is null or
     *         if {@code request.getSession()} is null or invalid
     */
    @Nonnull
    DependencyCoordinates create(@Nonnull DependencyCoordinatesFactoryRequest request);

    @Nonnull

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

/**
 * Unit tests for {@link NegTokenTarg}. The class has no external
 * collaborators so tests are mostly focused on round‑trip
 * serialisation and invalid input handling.
 */
class NegTokenTargTest {

    @Test
    @DisplayName("happy path – full token round‑trip")
    void testRoundTripFull() throws IOException {
        // Arrange – create a fully populated token

            new SmbTreeConnectionTrace(ctx).getConnectedShare();
        }));
    }

    @ParameterizedTest(name = "Invalid usage causes NPE: {0}")
    @MethodSource("npePublicGetters")
    void getters_withoutTree_throwNPE(String name, org.junit.jupiter.api.function.Executable call) {
        // Each call is invalid without a held tree and should throw NPE
        assertThrows(NullPointerException.class, call);
    }

		Message:    "Remote tier bucket not found",
		StatusCode: http.StatusBadRequest,
	}
	// error returned when remote tier credentials are invalid.
	errTierInvalidCredentials = AdminError{
		Code:       "XMinioAdminTierInvalidCredentials",
		Message:    "Invalid remote tier credentials",
		StatusCode: http.StatusBadRequest,
	}
	// error returned when reserved internal names are used.
	errTierReservedName = AdminError{

    assertThat(client.processNextFrame()).isFalse()
    client.listener.assertClosing(1000, "Bye!")
  }

  @Test
  fun protocolErrorBeforeCloseSendsFailure() {
    server.sink.write("0a00".decodeHex()).emit() // Invalid non-final ping frame.
    client.processNextFrame() // Detects error, send close, close connection.
    taskFaker.runTasks()
    client.webSocket!!.finishReader()
    assertThat(client.closed).isTrue()

		{"ideas-are-more-powerful-than-guns", true},
		{"testbucket", true},
		{"1bucket", true},
		{"bucket1", true},
		{"a.b", true},
		{"ab.a.bc", true},
		// cases for which test should fail.
		// passing invalid bucket names.
		{"------", false},
		{"my..bucket", false},
		{"192.168.1.1", false},
		{"$this-is-not-valid-too", false},
		{"contains-$-dollar", false},
		{"contains-^-caret", false},

                return LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
            } catch (final DateTimeParseException e) {
                logger.debug("Invalid date format: {}", value, e);
            }
        }
        return DfTypeUtil.toLocalDateTime(value);
    }

    void testMessageAndCauseConstructor() {
        // Test the constructor with both message and cause arguments
        String message = "Test message with cause";
        Throwable cause = new IllegalArgumentException("Invalid argument");
        RequestTimeoutException exception = new RequestTimeoutException(message, cause);
        assertEquals(message, exception.getMessage(), "Message should match the provided string");