// Assert
        assertArrayEquals(expected, actual, "Base64.decode should return original bytes");
    }

    @Test
    @DisplayName("encode should throw NPE on null input")
    void testEncodeNull() {
        assertThrows(NullPointerException.class, () -> Base64.encode(null));
    }

    @Test
    @DisplayName("decode should throw NPE on null input")
    void testDecodeNull() {

    assertFalse(
        "removeAll(emptyCollection) should return false",
        collection.removeAll(MinimalCollection.of()));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testRemoveAll_nonePresent() {
    assertFalse(
        "removeAll(disjointCollection) should return false",
        collection.removeAll(MinimalCollection.of(e3())));
    expectUnchanged();

        // Verify the object was created successfully
        assertNotNull(msg, "Message should not be null");
        // The command should still be SMB_COM_LOGOFF_ANDX regardless of andx command
        assertEquals((byte) 0x74, msg.command, "Command should be SMB_COM_LOGOFF_ANDX");
    }

    @Test
    @DisplayName("constructor with null andx does not throw exception")

		t.Fatalf("no error should happen but got %v", err)
	}

	time.Sleep(time.Second)

	var result2 User
	if err := tx.Find(&result2, user.ID).Error; err != nil {
		t.Fatalf("no error should happen but got %v", err)
	}

	user2 := *GetUser("prepared_stmt2", Config{})
	if err := txCtx.Create(&user2).Error; err == nil {
		t.Fatalf("should failed to create with timeout context")
	}

        // 1. Class should be final (or have private constructor)
        Constructor<?>[] constructors = SystemUtil.class.getDeclaredConstructors();
        assertEquals("Should have exactly one constructor", 1, constructors.length);
        assertTrue("Constructor should be private", java.lang.reflect.Modifier.isPrivate(constructors[0].getModifiers()));

        // 2. All methods should be static

        // Act & Assert
        assertTrue(itr.hasNext(), "Should have first element ready");
        SmbResource r1 = itr.next();
        assertNotNull(r1, "First adapted resource must not be null");
        // For workgroup/server entries, names end with '/'
        assertTrue(r1.getName().endsWith("/"), "Name should end with '/'");

        assertTrue(itr.hasNext(), "Should have second element ready");
        SmbResource r2 = itr.next();

            assertEquals(0, aad[i], "Signature bytes should be zero in AAD");
        }

        // Verify nonce matches at position 20
        for (int i = 0; i < 16; i++) {
            assertEquals(testNonce[i], aad[20 + i], "Nonce should match at position " + (20 + i));
        }
    }

    @Test
    @DisplayName("Should create transform header with constructor")

  /**
   * This method should be used to initiate service shutdown. The invocation of this method should
   * cause a call to {@link #notifyStopped()}, either during this method's run, or after it has
   * returned. If shutdown fails, the invocation should cause a call to {@link
   * #notifyFailed(Throwable)} instead.
   *
   * <p>This method should return promptly; prefer to do work on a different thread where it is

        assertTrue("Minimum version should be at least SMB2.0.2", config.getMinimumVersion().atLeast(DialectVersion.SMB202));

        // Verify LM compatibility level is 3 or higher (NTLMv2 only)
        assertTrue("LM compatibility should be 3 or higher for NTLMv2 only", config.getLanManCompatibility() >= 3);
        assertEquals("LM compatibility should default to 3", 3, config.getLanManCompatibility());

            assertSame(impl, renewed, "renew() should return the same instance");
        } else if (expectNew) {
            assertNotNull(renewed, "renew() should return a new non-null instance");
            assertNotSame(impl, renewed, "renew() should return a different instance");
            assertTrue(renewed instanceof SmbRenewableCredentials, "renewed credentials should still be SmbRenewableCredentials");
        } else {