func TestV1DataVersioningBiggerToEmpty(t *testing.T) {
//expTwoSet := CapnpEncode("(mylist = [(val = 27, duo = 26),(val = 42, duo = 41)])", "HoldsVerTwoDataList")
//expOneDataOneDefault := CapnpEncode("(mylist = [(val = 27, duo = 0),(val = 42, duo = 0)])", "HoldsVerTwoDataList")
//expTwoEmpty := CapnpEncode("(mylist = [(),()])", "HoldsVerTwoDataList")
//expEmpty := CapnpEncode("(mylist = [(),()])", "HoldsVerEmptyList")
//expOne := CapnpEncode("(mylist = [(val = 27),(val = 42)])", "HoldsVerOneDataList")
cv.Convey("Given a struct with 0 data/0 ptr fields, and a newer version of the struct with 2 data fields", t, func() {
cv.Convey("then reading serialized bigger-struct-list into the smaller (empty or one data-member) list should work, truncating/ignoring the new fields", func() {
seg := capn.NewBuffer(nil)
scratch := capn.NewBuffer(nil)
holder := air.NewRootHoldsVerTwoDataList(seg)
twolist := air.NewVerTwoDataList(scratch, 2)
plist := capn.PointerList(twolist)
d0 := air.NewVerTwoData(scratch)
d0.SetVal(27)
d0.SetDuo(26)
d1 := air.NewVerTwoData(scratch)
d1.SetVal(42)
d1.SetDuo(41)
plist.Set(0, capn.Object(d0))
plist.Set(1, capn.Object(d1))
holder.SetMylist(twolist)
ShowSeg(" before serializing out, segment scratch is:", scratch)
ShowSeg(" before serializing out, segment seg is:", seg)
// serialize out
buf := bytes.Buffer{}
seg.WriteTo(&buf)
segbytes := buf.Bytes()
// and read-back in using smaller expectations
reseg, _, err := capn.ReadFromMemoryZeroCopy(segbytes)
if err != nil {
panic(err)
}
ShowSeg(" after re-reading segbytes, segment reseg is:", reseg)
fmt.Printf("segbytes decoded by capnp as HoldsVerEmptyList: '%s'\n", string(CapnpDecode(segbytes, "HoldsVerEmptyList")))
fmt.Printf("segbytes decoded by capnp as HoldsVerOneDataList: '%s'\n", string(CapnpDecode(segbytes, "HoldsVerOneDataList")))
fmt.Printf("segbytes decoded by capnp as HoldsVerTwoDataList: '%s'\n", string(CapnpDecode(segbytes, "HoldsVerTwoDataList")))
reHolder := air.ReadRootHoldsVerEmptyList(reseg)
elist := reHolder.Mylist()
lene := elist.Len()
cv.So(lene, cv.ShouldEqual, 2)
reHolder1 := air.ReadRootHoldsVerOneDataList(reseg)
onelist := reHolder1.Mylist()
lenone := onelist.Len()
cv.So(lenone, cv.ShouldEqual, 2)
for i := 0; i < 2; i++ {
ele := onelist.At(i)
val := ele.Val()
cv.So(val, cv.ShouldEqual, twolist.At(i).Val())
}
reHolder2 := air.ReadRootHoldsVerTwoDataList(reseg)
twolist2 := reHolder2.Mylist()
lentwo2 := twolist2.Len()
cv.So(lentwo2, cv.ShouldEqual, 2)
for i := 0; i < 2; i++ {
ele := twolist2.At(i)
val := ele.Val()
duo := ele.Duo()
cv.So(val, cv.ShouldEqual, twolist.At(i).Val())
cv.So(duo, cv.ShouldEqual, twolist.At(i).Duo())
}
})
})
}
func TestV1DataVersioningEmptyToBigger(t *testing.T) {
//expOneSet := CapnpEncode("(mylist = [(val = 27),(val = 42)])", "HoldsVerOneDataList")
//expOneZeroed := CapnpEncode("(mylist = [(val = 0),(val = 0)])", "HoldsVerOneDataList")
//expOneEmpty := CapnpEncode("(mylist = [(),()])", "HoldsVerOneDataList")
expEmpty := CapnpEncode("(mylist = [(),()])", "HoldsVerEmptyList")
cv.Convey("Given a struct with 0 data/0 ptr fields, and a newer version of the struct with 1 data fields", t, func() {
cv.Convey("then reading from serialized form the small list into the bigger (one or two data values) list should work, getting default value 0 for val/duo.", func() {
seg := capn.NewBuffer(nil)
scratch := capn.NewBuffer(nil)
emptyholder := air.NewRootHoldsVerEmptyList(seg)
elist := air.NewVerEmptyList(scratch, 2)
emptyholder.SetMylist(elist)
actEmpty := ShowSeg(" after NewRootHoldsVerEmptyList(seg) and SetMylist(elist), segment seg is:", seg)
actEmptyCap := string(CapnpDecode(actEmpty, "HoldsVerEmptyList"))
expEmptyCap := string(CapnpDecode(expEmpty, "HoldsVerEmptyList"))
cv.So(actEmptyCap, cv.ShouldResemble, expEmptyCap)
fmt.Printf("\n actEmpty is \n")
ShowBytes(actEmpty, 10)
fmt.Printf("actEmpty decoded by capnp: '%s'\n", string(CapnpDecode(actEmpty, "HoldsVerEmptyList")))
cv.So(actEmpty, cv.ShouldResemble, expEmpty)
// seg is set, now read into bigger list
buf := bytes.Buffer{}
seg.WriteTo(&buf)
segbytes := buf.Bytes()
reseg, _, err := capn.ReadFromMemoryZeroCopy(segbytes)
if err != nil {
panic(err)
}
ShowSeg(" after re-reading segbytes, segment reseg is:", reseg)
fmt.Printf("segbytes decoded by capnp as HoldsVerOneDataList: '%s'\n", string(CapnpDecode(segbytes, "HoldsVerOneDataList")))
reHolder := air.ReadRootHoldsVerOneDataList(reseg)
onelist := reHolder.Mylist()
lenone := onelist.Len()
cv.So(lenone, cv.ShouldEqual, 2)
for i := 0; i < 2; i++ {
ele := onelist.At(i)
val := ele.Val()
cv.So(val, cv.ShouldEqual, 0)
}
reHolder2 := air.ReadRootHoldsVerTwoDataList(reseg)
twolist := reHolder2.Mylist()
lentwo := twolist.Len()
cv.So(lentwo, cv.ShouldEqual, 2)
for i := 0; i < 2; i++ {
ele := twolist.At(i)
val := ele.Val()
cv.So(val, cv.ShouldEqual, 0)
duo := ele.Duo()
cv.So(duo, cv.ShouldEqual, 0)
}
})
})
}