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canonical_test.go
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canonical_test.go
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package capnp
import (
"bytes"
"encoding/hex"
"testing"
)
func TestCanonicalize(t *testing.T) {
{
// null
b, err := Canonicalize(Struct{})
if err != nil {
t.Fatal("Canonicalize(Struct{}):", err)
}
if want := ([]byte{0, 0, 0, 0, 0, 0, 0, 0}); !bytes.Equal(b, want) {
t.Errorf("Canonicalize(Struct{}) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// empty struct
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{})
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(empty struct):", err)
}
want := ([]byte{0xfc, 0xff, 0xff, 0xff, 0, 0, 0, 0})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(empty struct) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// zero data, zero pointer struct
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{DataSize: 8, PointerCount: 1})
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(zero data, zero pointer struct):", err)
}
want := ([]byte{0xfc, 0xff, 0xff, 0xff, 0, 0, 0, 0})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(zero data, zero pointer struct) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// one word data struct
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{DataSize: 8, PointerCount: 1})
s.SetUint16(0, 0xbeef)
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(one word data struct):", err)
}
want := ([]byte{
0, 0, 0, 0, 1, 0, 0, 0,
0xef, 0xbe, 0, 0, 0, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(one word data struct) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// two pointers to zero structs
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 2})
e1, _ := NewStruct(seg, ObjectSize{DataSize: 8})
e2, _ := NewStruct(seg, ObjectSize{DataSize: 8})
s.SetPtr(0, e1.ToPtr())
s.SetPtr(1, e2.ToPtr())
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(two pointers to zero structs):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 2, 0,
0xfc, 0xff, 0xff, 0xff, 0, 0, 0, 0,
0xfc, 0xff, 0xff, 0xff, 0, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(two pointers to zero structs) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// int list
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 1})
l, _ := NewInt8List(seg, 5)
s.SetPtr(0, l.ToPtr())
l.Set(0, 1)
l.Set(1, 2)
l.Set(2, 3)
l.Set(3, 4)
l.Set(4, 5)
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(int list):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 1, 0,
0x01, 0, 0, 0, 0x2a, 0, 0, 0,
1, 2, 3, 4, 5, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(int list) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// zero int list
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 1})
l, _ := NewInt8List(seg, 5)
s.SetPtr(0, l.ToPtr())
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(zero int list):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 1, 0,
0x01, 0, 0, 0, 0x2a, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(zero int list) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// struct list
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 1})
l, _ := NewCompositeList(seg, ObjectSize{DataSize: 8, PointerCount: 1}, 2)
s.SetPtr(0, l.ToPtr())
l.Struct(0).SetUint64(0, 0xdeadbeef)
txt, _ := NewText(seg, "xyzzy")
l.Struct(1).SetPtr(0, txt.ToPtr())
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(struct list):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 1, 0,
0x01, 0, 0, 0, 0x27, 0, 0, 0,
0x08, 0, 0, 0, 1, 0, 1, 0,
0xef, 0xbe, 0xad, 0xde, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0x01, 0, 0, 0, 0x32, 0, 0, 0,
'x', 'y', 'z', 'z', 'y', 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(struct list) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// zero struct list
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 1})
l, _ := NewCompositeList(seg, ObjectSize{DataSize: 16, PointerCount: 2}, 3)
s.SetPtr(0, l.ToPtr())
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(zero struct list):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 1, 0,
0x01, 0, 0, 0, 0x07, 0, 0, 0,
0x0c, 0, 0, 0, 0, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(zero struct list) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
{
// zero-length struct list
_, seg, _ := NewMessage(SingleSegment(nil))
s, _ := NewStruct(seg, ObjectSize{PointerCount: 1})
l, _ := NewCompositeList(seg, ObjectSize{DataSize: 16, PointerCount: 2}, 0)
s.SetPtr(0, l.ToPtr())
b, err := Canonicalize(s)
if err != nil {
t.Fatal("Canonicalize(zero-length struct list):", err)
}
want := ([]byte{
0, 0, 0, 0, 0, 0, 1, 0,
0x01, 0, 0, 0, 0x07, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
})
if !bytes.Equal(b, want) {
t.Errorf("Canonicalize(zero-length struct list) =\n%s\n; want\n%s", hex.Dump(b), hex.Dump(want))
}
}
}