cache.releaseBuffer(new byte[1024]);
        }, "All BufferCache interface methods should be callable");
    }

    @Test
    @DisplayName("getBuffer should return non-null byte array")
    void testGetBufferContract() {
        // Given
        byte[] expectedBuffer = new byte[1024];
        when(mockBufferCache.getBuffer()).thenReturn(expectedBuffer);

        // When
        byte[] buffer = mockBufferCache.getBuffer();