rlp: add NewListStream (for p2p)

This commit is contained in:
Felix Lange 2014-11-24 19:02:04 +01:00
parent 5a5560f105
commit 205af02a1f
2 changed files with 27 additions and 0 deletions

View File

@ -442,6 +442,15 @@ func NewStream(r io.Reader) *Stream {
s.Reset(r)
return s
}
// NewListStream creates a new stream that pretends to be positioned
// at an encoded list of the given length.
func NewListStream(r io.Reader, len uint64) *Stream {
s := new(Stream)
s.Reset(r)
s.kind = List
s.size = len
return s
}
// Bytes reads an RLP string and returns its contents as a byte slice.

View File

@ -54,6 +54,24 @@ func TestStreamKind(t *testing.T) {
}
}
func TestNewListStream(t *testing.T) {
ls := NewListStream(bytes.NewReader(unhex("0101010101")), 3)
if k, size, err := ls.Kind(); k != List || size != 3 || err != nil {
t.Errorf("Kind() returned (%v, %d, %v), expected (List, 3, nil)", k, size, err)
}
if size, err := ls.List(); size != 3 || err != nil {
t.Errorf("List() returned (%d, %v), expected (3, nil)", size, err)
}
for i := 0; i < 3; i++ {
if val, err := ls.Uint(); val != 1 || err != nil {
t.Errorf("Uint() returned (%d, %v), expected (1, nil)", val, err)
}
}
if err := ls.ListEnd(); err != nil {
t.Errorf("ListEnd() returned %v, expected (3, nil)", err)
}
}
func TestStreamErrors(t *testing.T) {
type calls []string
tests := []struct {