int apply(FileEntry e);
    }

    private interface LongGetter {
        long apply(FileEntry e);
    }

    // --- Mockito-based interaction tests ---

    @Test
    @DisplayName("Mocked FileEntry returns stubbed values and verifies interactions")
    void mockedEntry_happyPath_and_interactions() {
        // Arrange: stub all methods with representative values

        // Test interface method
        byte level = mockFileInfo.getFileInformationLevel();
        assertEquals(FileInformation.FILE_BASIC_INFO, level);

        // Verify interaction
        verify(mockFileInfo).getFileInformationLevel();
    }

    /**
     * Test FileInformation as Decodable
     */
    @Test
    @DisplayName("Test FileInformation decode method")

            if (tc == null) {
                throw new NullPointerException("tc");
            }
            // Exercise interaction with dependency for verification purposes
            // These methods do not throw and allow interaction checks.
            tc.getConfig();
            tc.getCredentials();

            // Minimal behavior: return a mock SSPContext with lenient stubbing

    void supportsIntegrity_alwaysTrue() {
        assertTrue(ctx.supportsIntegrity());
    }

    @Test
    @DisplayName("calculateMIC returns value from GSS and verifies interaction")
    void calculateMIC_success() throws Exception {
        byte[] data = new byte[] { 1, 2, 3 };
        byte[] mic = new byte[] { 9, 8 };
        when(gssContext.getMIC(eq(data), eq(0), eq(3), any())).thenReturn(mic);

            int result = resp.readDataWireFormat(buffer, 0, 50);
            assertEquals(0, result);
            assertNull(resp.info);
        }
    }

    @Nested
    @DisplayName("Mock Interaction Tests")
    class MockInteractionTests {

        @Test
        @DisplayName("Should interact with mock Info interface")
        void testMockInfoInteraction() {
            // Create a mock of the Info interface

        // Avoid real JAAS by stubbing getSubject
        doReturn(new Subject()).when(auth).getSubject();

        // Act
        CredentialsInternal result = auth.renew();

        // Assert interaction and return value
        assertSame(auth, result);
        verify(auth, times(1)).getSubject();
    }

                    session.getConfig();
                }
            }, "Should propagate cleanup exceptions");
        }
    }

    @Nested
    @DisplayName("Mock Interaction Tests")
    class MockInteractionTest {

        @Test
        @DisplayName("Should allow all methods to be mocked independently")
        void shouldAllowAllMethodsToBeMockedIndependently() throws Exception {

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* Потім натисніть кнопку "Execute", інтерфейс користувача зв'яжеться з вашим API, надішле параметри, отримає результати та покаже їх на екрані:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)

        assertEquals(3.14, captured.get("double"));
        assertNotNull(captured.get("map"));
    }

    @Test
    public void test_store_withCallbackInteraction() {
        // Test store with callback interaction
        final TestIndexUpdateCallback callback = new TestIndexUpdateCallback();

        dataStore = new DataStore() {
            @Override

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* Затем нажмите кнопку «Execute», интерфейс свяжется с вашим API, отправит параметры, получит результаты и отобразит их на экране:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)