## Parameterize the instance { #parameterize-the-instance }

And now, we can use `__init__` to declare the parameters of the instance that we can use to "parameterize" the dependency:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[9] *}

        // Verify instance is created
        assertNotNull(fileInfo);
        assertEquals(FileInformation.FILE_ENDOFFILE_INFO, fileInfo.getFileInformationLevel());
    }

    @Test
    @DisplayName("Test parameterized constructor with end of file value")
    void testParameterizedConstructor() {
        // Test with specific end of file value
        long endOfFile = 1024L;

            return length;
        }

        @Override
        public int getFileIndex() {
            return fileIndex;
        }
    }

    // Functional helpers for concise parameterized tests
    private interface IntGetter {
        int apply(FileEntry e);
    }

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

            assertEquals(-10L, mock.length());
        }
    }

    @ParameterizedTest(name = "getType returns {0}")
    @ValueSource(ints = { 0, 1, -5, Integer.MAX_VALUE })
    @DisplayName("Parameterized type values")
    void typeParameterized(int type) {
        FileEntry mock = mock(FileEntry.class);
        when(mock.getType()).thenReturn(type);
        assertEquals(type, mock.getType());
    }

    @Test

        verify(mockAllocInfo, times(1)).getCapacity();
        verify(mockAllocInfo, times(1)).getFree();
    }

    /**
     * Parameterised test of capacity values, including edge cases such as
     * zero and negative capacities.
     */
    @ParameterizedTest
    @ValueSource(longs = { 0L, -1L, Long.MAX_VALUE })

        assertEquals(3, third.length, "Allocated buffer length matches configured maximum size");
    }

    // Parameterized: exercise small variations of cache size for a simple reuse cycle
    @ParameterizedTest
    @ValueSource(ints = { 1, 2 })
    @DisplayName("Parameterized: buffer reuse works for various small cache sizes")
    void reuseWorksForVariousCacheSizes(int cacheSize) {

 */
@ExtendWith(MockitoExtension.class)
class SMBProtocolDowngradeExceptionTest {

    /**
     * Provides messages including edge cases (null and empty) for parameterized testing.
     */
    static Stream<Arguments> messages() {
        return Stream.of(Arguments.of((String) null), Arguments.of(""), Arguments.of("unexpected downgrade"));
    }

    @Test

                "The error string should match the expected message for given error class and code");
    }

    /**
     * Provides arguments for the testGetErrorString parameterized test.
     * Covers all defined error classes and codes, including default cases.
     */
    private static Stream<Arguments> provideErrorClassAndCodeForGetErrorString() {
        return Stream.of(

    private static final String SPNEGO_OID_STR = SpnegoConstants.SPNEGO_MECHANISM;

    // Helper to build a SPNEGO NegTokenInit as per NegTokenInit#toByteArray but parameterized for tests
    private static byte[] buildInitToken(ASN1ObjectIdentifier[] mechs, Integer flags, byte[] mechToken, byte[] mic, boolean micInTag4,

        new DosFileFilter("*.*", SmbFile.ATTR_ARCHIVE);
        new DosFileFilter("?", SmbFile.ATTR_DIRECTORY);
        new DosFileFilter("file.txt", SmbFile.ATTR_READONLY | SmbFile.ATTR_HIDDEN);
    }

    /**
     * Parameterized test for the {@link DosFileFilter#accept(SmbFile)} method.
     * This test covers various combinations of file attributes and filter attributes
     * to ensure the bitwise logic is correctly implemented.
     *