}
    }

    @Test
    public void testFileBasedCacheWithEmptyFile() throws IOException {
        tempFile = File.createTempFile("empty", ".tmp", Curl.tmpDir);
        // File is created but empty

        ContentCache cache = new ContentCache(tempFile);

        try (InputStream stream = cache.getInputStream()) {
            assertNotNull(stream);

        LogStream.setInstance(stream1);
        LogStream instance1 = LogStream.getInstance();

        LogStream.setInstance(stream2);
        LogStream instance2 = LogStream.getInstance();

        // Each setInstance should create a new LogStream
        assertNotNull(instance1);
        assertNotNull(instance2);

         * Executes the provided {@link Consumer} with a {@link Stream} obtained from the supplier.
         * The stream is automatically closed after the consumer is executed.
         *
         * @param stream the {@link Consumer} to process the {@link Stream}
         */
        public void of(final Consumer<Stream<T>> stream) {
            try (Stream<T> s = supplier.get()) {
                stream.accept(s);
            }
        }

/**
 * MimeTypeHelper provides methods to determine the content type of a given input stream or file.
 * It allows content type detection based on the stream's content and/or filename.
 */
public interface MimeTypeHelper {
    /**
     * Determines the content type of the given input stream and filename.
     * @param is the input stream to analyze
     * @param filename the filename to help determine the content type

        return chains().get(stream -> stream.allMatch(c -> c.changePassword(username, password)));
    }

    /**
     * Deletes a user from all authentication chains.
     * @param user The user to delete.
     */
    public void delete(final User user) {
        chains().of(stream -> stream.forEach(c -> c.delete(user)));
    }

    /**

        try (TokenStream stream = createTokenStream(rd)) {
            if (stream == null) {
                throw new IOException("Invalid tokenizer.");
            }
            stream.reset();

            int offset = 0;
            while (stream.incrementToken()) {
                final CharTermAttribute att = stream.getAttribute(CharTermAttribute.class);

                                    StreamUtil.stream(groupsAndRoles.getFirst()).of(stream1 -> stream1.forEach(groupList::add));
                                    StreamUtil.stream(groupsAndRoles.getSecond()).of(stream2 -> stream2.forEach(roleList::add));
                                }
                            }
                        }

        assertThrows(IOException.class, () -> sis.read());
    }

    @Test
    @DisplayName("Available returns underlying stream available when no message buffered")
    void availableReturnsUnderlyingWhenNoMessage() throws IOException {
        // Mock input stream that reports available bytes
        InputStream mockIn = mock(InputStream.class);
        when(mockIn.available()).thenReturn(42);

        IgnoreCloseInputStream stream = new IgnoreCloseInputStream(underlyingStream);

        // Read some data
        assertEquals('T', stream.read());

        // Close should be ignored
        stream.close();

        // Should still be able to read
        assertEquals('e', stream.read());
        assertEquals('s', stream.read());
        assertEquals('t', stream.read());
    }

        try (TemporaryFileInputStream stream = new TemporaryFileInputStream(tempFile)) {
            assertEquals('T', stream.read());
            assertEquals('e', stream.read());
            assertEquals('s', stream.read());
            assertEquals('t', stream.read());
            assertEquals(' ', stream.read());
            assertEquals('d', stream.read());
            assertEquals('a', stream.read());