mirror of https://github.com/jackc/pgx.git
97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package chunkreader
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
)
|
|
|
|
func TestChunkReaderNextDoesNotReadIfAlreadyBuffered(t *testing.T) {
|
|
server := &bytes.Buffer{}
|
|
r, err := NewChunkReaderEx(server, Options{MinBufLen: 4})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
src := []byte{1, 2, 3, 4}
|
|
server.Write(src)
|
|
|
|
n1, err := r.Next(2)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if bytes.Compare(n1, src[0:2]) != 0 {
|
|
t.Fatalf("Expected read bytes to be %v, but they were %v", src[0:2], n1)
|
|
}
|
|
|
|
n2, err := r.Next(2)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if bytes.Compare(n2, src[2:4]) != 0 {
|
|
t.Fatalf("Expected read bytes to be %v, but they were %v", src[2:4], n2)
|
|
}
|
|
|
|
if bytes.Compare(r.buf, src) != 0 {
|
|
t.Fatalf("Expected r.buf to be %v, but it was %v", src, r.buf)
|
|
}
|
|
if r.rp != 4 {
|
|
t.Fatalf("Expected r.rp to be %v, but it was %v", 4, r.rp)
|
|
}
|
|
if r.wp != 4 {
|
|
t.Fatalf("Expected r.wp to be %v, but it was %v", 4, r.wp)
|
|
}
|
|
}
|
|
|
|
func TestChunkReaderNextExpandsBufAsNeeded(t *testing.T) {
|
|
server := &bytes.Buffer{}
|
|
r, err := NewChunkReaderEx(server, Options{MinBufLen: 4})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
src := []byte{1, 2, 3, 4, 5, 6, 7, 8}
|
|
server.Write(src)
|
|
|
|
n1, err := r.Next(5)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if bytes.Compare(n1, src[0:5]) != 0 {
|
|
t.Fatalf("Expected read bytes to be %v, but they were %v", src[0:5], n1)
|
|
}
|
|
if len(r.buf) != 5 {
|
|
t.Fatalf("Expected len(r.buf) to be %v, but it was %v", 5, len(r.buf))
|
|
}
|
|
}
|
|
|
|
func TestChunkReaderDoesNotReuseBuf(t *testing.T) {
|
|
server := &bytes.Buffer{}
|
|
r, err := NewChunkReaderEx(server, Options{MinBufLen: 4})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
src := []byte{1, 2, 3, 4, 5, 6, 7, 8}
|
|
server.Write(src)
|
|
|
|
n1, err := r.Next(4)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if bytes.Compare(n1, src[0:4]) != 0 {
|
|
t.Fatalf("Expected read bytes to be %v, but they were %v", src[0:4], n1)
|
|
}
|
|
|
|
n2, err := r.Next(4)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if bytes.Compare(n2, src[4:8]) != 0 {
|
|
t.Fatalf("Expected read bytes to be %v, but they were %v", src[4:8], n2)
|
|
}
|
|
|
|
if bytes.Compare(n1, src[0:4]) != 0 {
|
|
t.Fatalf("Expected KeepLast to prevent Next from overwriting buf, expected %v but it was %v", src[0:4], n1)
|
|
}
|
|
}
|