assertNotNull(exception);
        assertEquals(RootAction.class, exception.getActionClass());
    }

    public void test_getActionClass() {
        // Test getActionClass returns correct class
        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);
        Class<?> actionClass = exception.getActionClass();
        assertNotNull(actionClass);

Si añadiste la anotación del tipo de retorno, las herramientas y editores se quejarían con un error (correcto) diciéndote que tu función está devolviendo un tipo (por ejemplo, un dict) que es diferente de lo que declaraste (por ejemplo, un modelo de Pydantic).

        assertTrue(exception.getMessage().contains("DISK_FULL"));
        assertTrue(exception.getMessage().contains("Disk full"));
    }

    @Test
    @DisplayName("Should have correct retryable flags for error codes")
    void testErrorCodeRetryableFlags() {
        // Retryable errors
        assertTrue(SmbOperationException.ErrorCode.CONNECTION_FAILED.isRetryable());

    @Test
    void testWitnessEventTypes() {
        assertEquals(7, WitnessEventType.values().length);

        WitnessEventType[] events = WitnessEventType.values();

        // Verify all expected event types with correct values
        assertEquals(1, WitnessEventType.RESOURCE_CHANGE.getValue());
        assertEquals(2, WitnessEventType.CLIENT_MOVE.getValue());
        assertEquals(3, WitnessEventType.SHARE_MOVE.getValue());

            int terminationPos = Strings.findUNITermination(bufferWithTermination, 0, bufferWithTermination.length);

            // Then
            assertEquals(stringBytes.length, terminationPos, "Should find termination at correct position");
        }

        @Test
        @DisplayName("findUNITermination should throw exception when termination not found")
        void testFindUNITerminationNotFound() {
            // Given

            assertNull(context.getSalt());
        }
    }

    @Nested
    @DisplayName("Context Type Tests")
    class ContextTypeTests {

        @Test
        @DisplayName("Should return correct context type")
        void testGetContextType() {
            PreauthIntegrityNegotiateContext context = new PreauthIntegrityNegotiateContext();

If you added the return type annotation, tools and editors would complain with a (correct) error telling you that your function is returning a type (e.g. a dict) that is different from what you declared (e.g. a Pydantic model).

            assertArrayEquals(originalBuffer, buffer);
        }
    }

    @Nested
    @DisplayName("ToString Tests")
    class ToStringTests {

        @Test
        @DisplayName("Should generate correct string representation")
        void testToString() throws Exception {
            // Set up notification with known values
            byte oplockLevel = 0x02;
            byte[] fileId = new byte[16];

        // Then
        assertNotNull(transCallNamedPipe);
        assertEquals(TEST_PIPE_NAME, transCallNamedPipe.name);
    }

    @Test
    @DisplayName("Test writeSetupWireFormat writes correct bytes")
    void testWriteSetupWireFormat() {
        // Given
        transCallNamedPipe = new TransCallNamedPipe(mockConfig, TEST_PIPE_NAME, TEST_DATA, 0, TEST_DATA.length);
        byte[] dst = new byte[10];

            // Then
            assertNotNull(chunk);
        }
    }

    @Nested
    @DisplayName("Size Method Tests")
    class SizeTests {

        @Test
        @DisplayName("Should return correct size of 24 bytes")
        void testSize() {
            // Given
            SrvCopychunk chunk = new SrvCopychunk(0, 0, 0);

            // When
            int size = chunk.size();

            // Then