* - Uses ConcurrentLinkedQueue for O(1) operations
 * - Lock-free operations for better concurrency
 * - Proper buffer validation and limits
 */
public class BufferCache {

    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private BufferCache() {
        // Utility class - not instantiable
    }

    private static final int MAX_BUFFERS = Config.getInt("jcifs.smb1.smb.maxBuffers", 16);

 */
package jcifs;

/**
 * Internal API for managing reusable buffers
 *
 * @author mbechler
 *
 * <p>This interface is intended for internal use.</p>
 */
public interface BufferCache {

    /**
     * Gets a buffer from the cache or creates a new one if the cache is empty.
     *
     * @return a buffer from the cache, or a new one
     */
    byte[] getBuffer();

    /**

        assertDoesNotThrow(() -> {
            BufferCache.releaseBuffer(tooSmall);
            BufferCache.releaseBuffer(tooLarge);
            BufferCache.releaseBuffer(empty);
        });

        // Then - Invalid buffers should be silently ignored
        // Get a new buffer to verify cache still works
        byte[] validBuffer = BufferCache.getBuffer();

 */

package jcifs.smb;

import java.util.Arrays;

import jcifs.BufferCache;
import jcifs.Configuration;

/**
 * Cache for reusable byte buffers
 *
 *
 * <p>This class is intended for internal use.</p>
 */
public class BufferCacheImpl implements BufferCache {

    private final Object[] cache;
    private final int bufferSize;
    private int freeBuffers = 0;

import org.junit.jupiter.api.Test;
import org.mockito.Mock;

/**
 * Comprehensive test suite for BufferCache interface.
 * Tests the contract and behavior of BufferCache implementations.
 */
@DisplayName("BufferCache Interface Tests")
class BufferCacheTest extends BaseTest {

    @Mock
    private BufferCache mockBufferCache;

    private TestBufferCacheImpl testCache;

    @BeforeEach
    void setUp() {

            pool.contains(null); // Should be fast without global sync
        }

        // 2. Buffer Cache Test
        for (int i = 0; i < 100; i++) {
            byte[] buf = BufferCache.getBuffer();
            BufferCache.releaseBuffer(buf);
        }

        // 3. Atomic Operations Test
        AtomicLong counter = new AtomicLong(0);
        for (int i = 0; i < 1000; i++) {

    @DisplayName("getBufferCache should return initialized buffer cache")
    void testGetBufferCache() {
        // When
        BufferCache bufferCache = context.getBufferCache();

        // Then
        assertNotNull(bufferCache, "Buffer cache should not be null");
        assertSame(bufferCache, context.getBufferCache(), "Should return same instance on multiple calls");
    }

    @Test

    private final DfsResolver dfs;
    private final SidResolver sidResolver;
    private final Handler urlHandler;
    private final NameServiceClient nameServiceClient;
    private final BufferCache bufferCache;
    private final SmbTransportPool transportPool;
    private final CredentialsInternal defaultCredentials;

    /**
     * Construct a context
     *
     * @param config

import java.net.URLStreamHandler;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import jcifs.BufferCache;
import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.Configuration;
import jcifs.Credentials;
import jcifs.DfsResolver;
import jcifs.NameServiceClient;
import jcifs.SidResolver;

        verify(mockDelegate).getNameServiceClient();
    }

    @Test
    void testGetBufferCache() {
        // Test getBufferCache() method
        BufferCache mockBufferCache = mock(BufferCache.class);
        when(mockDelegate.getBufferCache()).thenReturn(mockBufferCache);
        assertEquals(mockBufferCache, cifsContextWrapper.getBufferCache());
        verify(mockDelegate).getBufferCache();