verify(this.mechContext, times(1)).getFlags();
        ArgumentCaptor<byte[]> cap = ArgumentCaptor.forClass(byte[].class);
        verify(this.mechContext, times(1)).initSecContext(cap.capture(), eq(0), eq(0));
        assertEquals(0, cap.getValue().length, "Optimistic token must be zero-length");
    }

    @ParameterizedTest
    @ValueSource(bytes = { 0x00, 0x7F, (byte) 0xFF })

    @ValueSource(ints = { -1, 0, 1, 1024 })
    void hasCapability_variousCaps(int cap) throws SmbException {
        when(transport.hasCapability(anyInt())).thenAnswer(inv -> ((int) inv.getArgument(0)) >= 0);

        boolean result = transport.hasCapability(cap);

        assertEquals(cap >= 0, result);
        verify(transport, times(1)).hasCapability(cap);
    }

	sz   int
	pool bpool.Pool[*[]byte]
}

func (b *bufPool) Put(buf []byte) {
	if cap(buf) < b.sz || cap(buf) > b.sz*2 {
		// Buffer too small or will likely leak memory after being expanded.
		// Drop it.
		return
	}
	b.pool.Put(&buf)
}

func (b *bufPool) Get() []byte {
	bufp := b.pool.Get()
	if bufp == nil || cap(*bufp) < b.sz {
		return make([]byte, 0, b.sz)
	}
	return (*bufp)[:b.sz]
}

    /**
     * Checks if the transport supports the specified capability.
     *
     * @param cap the capability flag to check
     * @return whether the transport has the given capability
     * @throws SmbException if an error occurs checking capabilities
     */
    boolean hasCapability(int cap) throws SmbException;

    /**
     * Checks if the transport has been disconnected.
     *

	var cap0 int
	for i := 0; i < 5<<10; i++ {
		b.Write(buf)
		b.Read(buf)
		if i == 0 {
			cap0 = b.Cap()
		}
	}
	cap1 := b.Cap()
	// (*Buffer).grow allows for 2x capacity slop before sliding,
	// so set our error threshold at 3x.
	if cap1 > cap0*3 {
		t.Errorf("buffer cap = %d; too big (grew from %d)", cap1, cap0)
	}
}

func BenchmarkWriteByte(b *testing.B) {
	const n = 4 << 10

    /**
     * Checks if the server has the specified capability
     * @param cap the capability flag to check
     * @return whether the capability is present
     * @throws CIFSException if an error occurs checking capabilities
     */
    boolean hasCapability(int cap) throws CIFSException;

    /**
     * Gets the send buffer size of the underlying SMB connection

				return
			}
		case "Rules":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "Rules")
				return
			}
			if cap(z.Rules) >= int(zb0002) {
				z.Rules = (z.Rules)[:zb0002]
			} else {
				z.Rules = make([]BatchJobExpireFilter, zb0002)
			}
			for za0001 := range z.Rules {
				err = z.Rules[za0001].DecodeMsg(dc)
				if err != nil {

// not be used after the arena is freed. Accessing the underlying storage of the
// slice after free may result in a fault, but this fault is also not guaranteed.
func MakeSlice[T any](a *Arena, len, cap int) []T {
	var sl []T
	runtime_arena_arena_Slice(a.a, &sl, cap)
	return sl[:len]
}

// Clone makes a shallow copy of the input value that is no longer bound to any
// arena it may have been allocated from, returning the copy. If it was not

				return
			}
		case "rss":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "PoolStats")
				return
			}
			if cap(z.PoolStats) >= int(zb0002) {
				z.PoolStats = (z.PoolStats)[:zb0002]
			} else {
				z.PoolStats = make([]*rebalanceStats, zb0002)
			}
			for za0001 := range z.PoolStats {
				if dc.IsNil() {

func (b *Buffer) Len() int { return len(b.buf) - b.off }

// Cap returns the capacity of the buffer's underlying byte slice, that is, the
// total space allocated for the buffer's data.
func (b *Buffer) Cap() int { return cap(b.buf) }

// Available returns how many bytes are unused in the buffer.
func (b *Buffer) Available() int { return cap(b.buf) - len(b.buf) }