void testHaveCapabilityMultipleFlags() {
        // Arrange
        int cap1 = 0x00000001;
        int cap2 = 0x00000002;
        int cap3 = 0x00000004;
        when(negotiationResponse.haveCapabilitiy(cap1)).thenReturn(true);
        when(negotiationResponse.haveCapabilitiy(cap2)).thenReturn(false);
        when(negotiationResponse.haveCapabilitiy(cap3)).thenReturn(true);

        // Act & Assert

	buf := make([]byte, 1024)
	b.Write(buf[0:1])
	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)
	}
}

    @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);
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.SmbNegotiationResponse#haveCapabilitiy(int)
     */
    @Override
    public boolean haveCapabilitiy(final int cap) {
        return (this.commonCapabilities & cap) == cap;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.SmbNegotiationResponse#isDFSSupported()
     */
    @Override
    public boolean isDFSSupported() {

            // Verify the request offset equals the skip value (2)
            ArgumentCaptor<Smb2ReadRequest> cap = ArgumentCaptor.forClass(Smb2ReadRequest.class);
            verify(mockTree).send(cap.capture(), any(RequestParam.class));
            Smb2ReadRequest req = cap.getValue();

            // Reflectively inspect the private 'offset' field to assert it used the advanced fp

        // When
        request = new Smb2NegotiateRequest(mockConfig, 0);

        // Then
        int caps = request.getCapabilities();
        int capCount = 0;
        if ((caps & Smb2Constants.SMB2_GLOBAL_CAP_DFS) != 0)
            capCount++;
        if ((caps & Smb2Constants.SMB2_GLOBAL_CAP_ENCRYPTION) != 0)
            capCount++;

        assertEquals(expectedCapabilityCount, capCount);
    }

				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 {

				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) }

		}

		if tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt); ok {
			tc.FuncName = "s3.MaxClients"
		}

		w.Header().Set("X-RateLimit-Limit", strconv.Itoa(cap(pool)))
		w.Header().Set("X-RateLimit-Remaining", strconv.Itoa(cap(pool)-len(pool)))

		ctx := r.Context()
		select {
		case pool <- struct{}{}:
			defer func() { <-pool }()
			globalHTTPStats.addRequestsInQueue(-1)