doNothing().when(trans1).close();

        // Return mocked transports
        doReturn(trans1).when(poolSpy).getSmbTransport(eq(ctx), eq(addr1), anyInt(), anyBoolean(), anyBoolean());
        doReturn(trans2).when(poolSpy).getSmbTransport(eq(ctx), eq(addr2), anyInt(), anyBoolean(), anyBoolean());

        // When: Get transport by name
        SmbTransportImpl result = poolSpy.getSmbTransport(ctx, "test.server", 445, false, false);

import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

            response.setAsync(true);

            boolean result = response.verifySignature(buffer, 0, 100);

            assertTrue(result);
            verify(mockDigest, never()).verify(any(), anyInt(), anyInt(), anyInt(), any());
        }

        @Test
        @DisplayName("Should skip verification when digest is null")
        void testVerifySignatureNoDigest() {
            byte[] buffer = new byte[100];

        assertEquals("Invalid token", ex.getMessage());

        // Ensure mechContext was not engaged due to early failure
        verify(this.mechContext, never()).initSecContext(any(), anyInt(), anyInt());
    }

    @Test
    @DisplayName("initSecContext with null buffer and non-zero len throws NPE")
    void testInitSecContextNullBufferNonZeroLen() throws Exception {

        lenient().when(handle.getBinding()).thenReturn(mockDcerpcBinding);
        lenient().doCallRealMethod().when(handle).doSendReceiveFragment(any(byte[].class), anyInt(), anyInt(), any(byte[].class));
        lenient().doCallRealMethod().when(handle).doSendFragment(any(byte[].class), anyInt(), anyInt());
        lenient().doCallRealMethod().when(handle).doReceiveFragment(any(byte[].class));
        lenient().doCallRealMethod().when(handle).close();

import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.ArgumentMatchers.isNull;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

        when(mockTransportPool.getSmbTransport(any(), anyString(), anyInt(), anyBoolean(), anyBoolean())).thenReturn(mockTransport);
        when(mockTransport.unwrap(any())).thenReturn(mockTransport);
        when(mockTransport.getDfsReferrals(any(), anyString(), anyString(), anyString(), anyInt())).thenReturn(null);
        assertNull(dfsResolver.getDc(mockContext, "anyDomain"));
    }

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import org.junit.jupiter.api.BeforeEach;

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.net.UnknownHostException;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

            // Given
            when(mockResource.openInputStream()).thenReturn(mockInputStream);
            when(mockResource.openInputStream(anyInt())).thenReturn(mockInputStream);
            when(mockResource.openInputStream(anyInt(), anyInt(), anyInt())).thenReturn(mockInputStream);

            // When
            InputStream is1 = mockResource.openInputStream();