func zdateFilledSegment(n int, packed bool) (*capn.Segment, []byte) {
	seg := capn.NewBuffer(nil)
	z := air.NewRootZ(seg)
	list := air.NewZdateList(seg, n)
	// hand added a Set() method to messages_test.go, so plist not needed
	plist := capn.PointerList(list)

	for i := 0; i < n; i++ {
		d := air.NewZdate(seg)
		d.SetMonth(12)
		d.SetDay(7)
		d.SetYear(int16(2004 + i))
		plist.Set(i, capn.Object(d))
		//list.Set(i, d)
	}
	z.SetZdatevec(list)

	buf := bytes.Buffer{}
	if packed {
		seg.WriteToPacked(&buf)
	} else {
		seg.WriteTo(&buf)
	}
	return seg, buf.Bytes()
}

func TestV0ListofEmptyShouldMatchCapnp(t *testing.T) {

	exp := CapnpEncode("(mylist = [(),()])", "HoldsVerEmptyList")

	cv.Convey("Given an empty struct with 0 data/0 ptr fields", t, func() {
		cv.Convey("then a list of 2 empty structs should match the capnp representation", func() {

			seg := capn.NewBuffer(nil)
			scratch := capn.NewBuffer(nil)
			holder := air.NewRootHoldsVerEmptyList(seg)

			ShowSeg("          after NewRootHoldsVerEmptyList(seg), segment seg is:", seg)

			elist := air.NewVerEmptyList(seg, 2)
			plist := capn.PointerList(elist)

			ShowSeg("          pre NewVerEmpty(scratch), segment seg is:", seg)

			e0 := air.NewVerEmpty(scratch)
			e1 := air.NewVerEmpty(scratch)
			plist.Set(0, capn.Object(e0))
			plist.Set(1, capn.Object(e1))

			ShowSeg("          pre SetMylist, segment seg is:", seg)

			fmt.Printf("Then we do the SetMylist():\n")
			holder.SetMylist(elist)

			// save
			buf := bytes.Buffer{}
			seg.WriteTo(&buf)
			act := buf.Bytes()
			save(act, "my.act.holder.elist")

			// show
			ShowSeg("          actual:\n", seg)

			fmt.Printf("act decoded by capnp: '%s'\n", string(CapnpDecode(act, "HoldsVerEmptyList")))

			fmt.Printf("expected:\n")
			ShowBytes(exp, 10)
			fmt.Printf("exp decoded by capnp: '%s'\n", string(CapnpDecode(exp, "HoldsVerEmptyList")))

			cv.So(act, cv.ShouldResemble, exp)
		})
	})
}

func TestZserverWithOneEmptyJob(t *testing.T) {

	exp := CapnpEncode(`(waitingjobs = [()])`, "Zserver")

	cv.Convey("Given an Zserver with one empty job", t, func() {
		cv.Convey("then the go-capnproto serialization should match the capnp c++ serialization", func() {

			seg := capn.NewBuffer(nil)
			scratch := capn.NewBuffer(nil)
			server := air.NewRootZserver(seg)

			joblist := air.NewZjobList(seg, 1)
			plist := capn.PointerList(joblist)

			ShowSeg("          pre NewZjob, segment seg is:", seg)

			zjob := air.NewZjob(scratch)
			plist.Set(0, capn.Object(zjob))

			ShowSeg("          pre SetWaitingjobs, segment seg is:", seg)

			fmt.Printf("Then we do the SetWaitingjobs:\n")
			server.SetWaitingjobs(joblist)

			// save
			buf := bytes.Buffer{}
			seg.WriteTo(&buf)
			act := buf.Bytes()
			save(act, "my.act.zserver")

			// show
			ShowSeg("          actual:\n", seg)

			fmt.Printf("act decoded by capnp: '%s'\n", string(CapnpDecode(act, "Zserver")))

			fmt.Printf("expected:\n")
			ShowBytes(exp, 10)
			fmt.Printf("exp decoded by capnp: '%s'\n", string(CapnpDecode(exp, "Zserver")))

			cv.So(act, cv.ShouldResemble, exp)
		})
	})
}

func TestZserverWithOneFullJob(t *testing.T) {

	exp := CapnpEncode(`(waitingjobs = [(cmd = "abc", args = ["xyz"])])`, "Zserver")

	cv.Convey("Given an Zserver with one empty job", t, func() {
		cv.Convey("then the go-capnproto serialization should match the capnp c++ serialization", func() {

			seg := capn.NewBuffer(nil)
			scratch := capn.NewBuffer(nil)

			server := air.NewRootZserver(seg)

			joblist := air.NewZjobList(seg, 1)
			plist := capn.PointerList(joblist)

			zjob := air.NewZjob(scratch)
			zjob.SetCmd("abc")
			tl := scratch.NewTextList(1)
			tl.Set(0, "xyz")
			zjob.SetArgs(tl)

			plist.Set(0, capn.Object(zjob))

			server.SetWaitingjobs(joblist)

			buf := bytes.Buffer{}
			seg.WriteTo(&buf)

			act := buf.Bytes()
			fmt.Printf("          actual:\n")
			ShowBytes(act, 10)
			fmt.Printf("act decoded by capnp: '%s'\n", string(CapnpDecode(act, "Zserver")))
			save(act, "myact")

			fmt.Printf("expected:\n")
			ShowBytes(exp, 10)
			fmt.Printf("exp decoded by capnp: '%s'\n", string(CapnpDecode(exp, "Zserver")))
			save(exp, "myexp")

			cv.So(act, cv.ShouldResemble, exp)
		})
	})
}

func (s Z_List) ToArray() []Z              { return *(*[]Z)(unsafe.Pointer(C.PointerList(s).ToArray())) }

func (s Z_List) Len() int                  { return C.PointerList(s).Len() }

func (s Routable_List) ToArray() []Routable {
	return *(*[]Routable)(unsafe.Pointer(C.PointerList(s).ToArray()))
}

func (s Routable_List) Len() int          { return C.PointerList(s).Len() }

func (s Request_List) At(i int) Request { return Request(C.PointerList(s).At(i).ToStruct()) }

func (s Ranges_List) ToArray() []Ranges {
	return *(*[]Ranges)(unsafe.Pointer(C.PointerList(s).ToArray()))
}

func (s StatisticalRecords_List) Len() int { return C.PointerList(s).Len() }

func (s Routable_List) At(i int) Routable { return Routable(C.PointerList(s).At(i).ToStruct()) }

func (s Routable_List) Set(i int, item Routable) { C.PointerList(s).Set(i, C.Object(item)) }

func (s Z_List) At(i int) Z                { return Z(C.PointerList(s).At(i).ToStruct()) }

func (s Z_List) Set(i int, item Z)         { C.PointerList(s).Set(i, C.Object(item)) }