522 lines
12 KiB
Go
522 lines
12 KiB
Go
// Copyright 2018 The gVisor Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package buffer_test contains tests for the VectorisedView type.
|
|
package buffer
|
|
|
|
import (
|
|
"bytes"
|
|
"reflect"
|
|
"testing"
|
|
)
|
|
|
|
// copy returns a deep-copy of the vectorised view.
|
|
func (vv VectorisedView) copy() VectorisedView {
|
|
uu := VectorisedView{
|
|
views: make([]View, 0, len(vv.views)),
|
|
size: vv.size,
|
|
}
|
|
for _, v := range vv.views {
|
|
uu.views = append(uu.views, append(View(nil), v...))
|
|
}
|
|
return uu
|
|
}
|
|
|
|
// vv is an helper to build VectorisedView from different strings.
|
|
func vv(size int, pieces ...string) VectorisedView {
|
|
views := make([]View, len(pieces))
|
|
for i, p := range pieces {
|
|
views[i] = []byte(p)
|
|
}
|
|
|
|
return NewVectorisedView(size, views)
|
|
}
|
|
|
|
var capLengthTestCases = []struct {
|
|
comment string
|
|
in VectorisedView
|
|
length int
|
|
want VectorisedView
|
|
}{
|
|
{
|
|
comment: "Simple case",
|
|
in: vv(2, "12"),
|
|
length: 1,
|
|
want: vv(1, "1"),
|
|
},
|
|
{
|
|
comment: "Case spanning across two Views",
|
|
in: vv(4, "123", "4"),
|
|
length: 2,
|
|
want: vv(2, "12"),
|
|
},
|
|
{
|
|
comment: "Corner case with negative length",
|
|
in: vv(1, "1"),
|
|
length: -1,
|
|
want: vv(0),
|
|
},
|
|
{
|
|
comment: "Corner case with length = 0",
|
|
in: vv(3, "12", "3"),
|
|
length: 0,
|
|
want: vv(0),
|
|
},
|
|
{
|
|
comment: "Corner case with length = size",
|
|
in: vv(1, "1"),
|
|
length: 1,
|
|
want: vv(1, "1"),
|
|
},
|
|
{
|
|
comment: "Corner case with length > size",
|
|
in: vv(1, "1"),
|
|
length: 2,
|
|
want: vv(1, "1"),
|
|
},
|
|
}
|
|
|
|
func TestCapLength(t *testing.T) {
|
|
for _, c := range capLengthTestCases {
|
|
orig := c.in.copy()
|
|
c.in.CapLength(c.length)
|
|
if !reflect.DeepEqual(c.in, c.want) {
|
|
t.Errorf("Test \"%s\" failed when calling CapLength(%d) on %v. Got %v. Want %v",
|
|
c.comment, c.length, orig, c.in, c.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
var trimFrontTestCases = []struct {
|
|
comment string
|
|
in VectorisedView
|
|
count int
|
|
want VectorisedView
|
|
}{
|
|
{
|
|
comment: "Simple case",
|
|
in: vv(2, "12"),
|
|
count: 1,
|
|
want: vv(1, "2"),
|
|
},
|
|
{
|
|
comment: "Case where we trim an entire View",
|
|
in: vv(2, "1", "2"),
|
|
count: 1,
|
|
want: vv(1, "2"),
|
|
},
|
|
{
|
|
comment: "Case spanning across two Views",
|
|
in: vv(3, "1", "23"),
|
|
count: 2,
|
|
want: vv(1, "3"),
|
|
},
|
|
{
|
|
comment: "Corner case with negative count",
|
|
in: vv(1, "1"),
|
|
count: -1,
|
|
want: vv(1, "1"),
|
|
},
|
|
{
|
|
comment: " Corner case with count = 0",
|
|
in: vv(1, "1"),
|
|
count: 0,
|
|
want: vv(1, "1"),
|
|
},
|
|
{
|
|
comment: "Corner case with count = size",
|
|
in: vv(1, "1"),
|
|
count: 1,
|
|
want: vv(0),
|
|
},
|
|
{
|
|
comment: "Corner case with count > size",
|
|
in: vv(1, "1"),
|
|
count: 2,
|
|
want: vv(0),
|
|
},
|
|
}
|
|
|
|
func TestTrimFront(t *testing.T) {
|
|
for _, c := range trimFrontTestCases {
|
|
orig := c.in.copy()
|
|
c.in.TrimFront(c.count)
|
|
if !reflect.DeepEqual(c.in, c.want) {
|
|
t.Errorf("Test \"%s\" failed when calling TrimFront(%d) on %v. Got %v. Want %v",
|
|
c.comment, c.count, orig, c.in, c.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
var toViewCases = []struct {
|
|
comment string
|
|
in VectorisedView
|
|
want View
|
|
}{
|
|
{
|
|
comment: "Simple case",
|
|
in: vv(2, "12"),
|
|
want: []byte("12"),
|
|
},
|
|
{
|
|
comment: "Case with multiple views",
|
|
in: vv(2, "1", "2"),
|
|
want: []byte("12"),
|
|
},
|
|
{
|
|
comment: "Empty case",
|
|
in: vv(0),
|
|
want: []byte(""),
|
|
},
|
|
}
|
|
|
|
func TestToView(t *testing.T) {
|
|
for _, c := range toViewCases {
|
|
got := c.in.ToView()
|
|
if !reflect.DeepEqual(got, c.want) {
|
|
t.Errorf("Test \"%s\" failed when calling ToView() on %v. Got %v. Want %v",
|
|
c.comment, c.in, got, c.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
var toCloneCases = []struct {
|
|
comment string
|
|
inView VectorisedView
|
|
inBuffer []View
|
|
}{
|
|
{
|
|
comment: "Simple case",
|
|
inView: vv(1, "1"),
|
|
inBuffer: make([]View, 1),
|
|
},
|
|
{
|
|
comment: "Case with multiple views",
|
|
inView: vv(2, "1", "2"),
|
|
inBuffer: make([]View, 2),
|
|
},
|
|
{
|
|
comment: "Case with buffer too small",
|
|
inView: vv(2, "1", "2"),
|
|
inBuffer: make([]View, 1),
|
|
},
|
|
{
|
|
comment: "Case with buffer larger than needed",
|
|
inView: vv(1, "1"),
|
|
inBuffer: make([]View, 2),
|
|
},
|
|
{
|
|
comment: "Case with nil buffer",
|
|
inView: vv(1, "1"),
|
|
inBuffer: nil,
|
|
},
|
|
}
|
|
|
|
func TestToClone(t *testing.T) {
|
|
for _, c := range toCloneCases {
|
|
t.Run(c.comment, func(t *testing.T) {
|
|
got := c.inView.Clone(c.inBuffer)
|
|
if !reflect.DeepEqual(got, c.inView) {
|
|
t.Fatalf("got (%+v).Clone(%+v) = %+v, want = %+v",
|
|
c.inView, c.inBuffer, got, c.inView)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestVVReadToVV(t *testing.T) {
|
|
testCases := []struct {
|
|
comment string
|
|
vv VectorisedView
|
|
bytesToRead int
|
|
wantBytes string
|
|
leftVV VectorisedView
|
|
}{
|
|
{
|
|
comment: "large VV, short read",
|
|
vv: vv(30, "012345678901234567890123456789"),
|
|
bytesToRead: 10,
|
|
wantBytes: "0123456789",
|
|
leftVV: vv(20, "01234567890123456789"),
|
|
},
|
|
{
|
|
comment: "largeVV, multiple views, short read",
|
|
vv: vv(13, "123", "345", "567", "8910"),
|
|
bytesToRead: 6,
|
|
wantBytes: "123345",
|
|
leftVV: vv(7, "567", "8910"),
|
|
},
|
|
{
|
|
comment: "smallVV (multiple views), large read",
|
|
vv: vv(3, "1", "2", "3"),
|
|
bytesToRead: 10,
|
|
wantBytes: "123",
|
|
leftVV: vv(0, ""),
|
|
},
|
|
{
|
|
comment: "smallVV (single view), large read",
|
|
vv: vv(1, "1"),
|
|
bytesToRead: 10,
|
|
wantBytes: "1",
|
|
leftVV: vv(0, ""),
|
|
},
|
|
{
|
|
comment: "emptyVV, large read",
|
|
vv: vv(0, ""),
|
|
bytesToRead: 10,
|
|
wantBytes: "",
|
|
leftVV: vv(0, ""),
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.comment, func(t *testing.T) {
|
|
var readTo VectorisedView
|
|
inSize := tc.vv.Size()
|
|
copied := tc.vv.ReadToVV(&readTo, tc.bytesToRead)
|
|
if got, want := copied, len(tc.wantBytes); got != want {
|
|
t.Errorf("incorrect number of bytes copied returned in ReadToVV got: %d, want: %d, tc: %+v", got, want, tc)
|
|
}
|
|
if got, want := string(readTo.ToView()), tc.wantBytes; got != want {
|
|
t.Errorf("unexpected content in readTo got: %s, want: %s", got, want)
|
|
}
|
|
if got, want := tc.vv.Size(), inSize-copied; got != want {
|
|
t.Errorf("test VV has incorrect size after reading got: %d, want: %d, tc.vv: %+v", got, want, tc.vv)
|
|
}
|
|
if got, want := string(tc.vv.ToView()), string(tc.leftVV.ToView()); got != want {
|
|
t.Errorf("unexpected data left in vv after read got: %+v, want: %+v", got, want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestVVRead(t *testing.T) {
|
|
testCases := []struct {
|
|
comment string
|
|
vv VectorisedView
|
|
bytesToRead int
|
|
readBytes string
|
|
leftBytes string
|
|
wantError bool
|
|
}{
|
|
{
|
|
comment: "large VV, short read",
|
|
vv: vv(30, "012345678901234567890123456789"),
|
|
bytesToRead: 10,
|
|
readBytes: "0123456789",
|
|
leftBytes: "01234567890123456789",
|
|
},
|
|
{
|
|
comment: "largeVV, multiple buffers, short read",
|
|
vv: vv(13, "123", "345", "567", "8910"),
|
|
bytesToRead: 6,
|
|
readBytes: "123345",
|
|
leftBytes: "5678910",
|
|
},
|
|
{
|
|
comment: "smallVV, large read",
|
|
vv: vv(3, "1", "2", "3"),
|
|
bytesToRead: 10,
|
|
readBytes: "123",
|
|
leftBytes: "",
|
|
},
|
|
{
|
|
comment: "smallVV, large read",
|
|
vv: vv(1, "1"),
|
|
bytesToRead: 10,
|
|
readBytes: "1",
|
|
leftBytes: "",
|
|
},
|
|
{
|
|
comment: "emptyVV, large read",
|
|
vv: vv(0, ""),
|
|
bytesToRead: 10,
|
|
readBytes: "",
|
|
wantError: true,
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.comment, func(t *testing.T) {
|
|
readTo := NewView(tc.bytesToRead)
|
|
inSize := tc.vv.Size()
|
|
copied, err := tc.vv.Read(readTo)
|
|
if !tc.wantError && err != nil {
|
|
t.Fatalf("unexpected error in tc.vv.Read(..) = %s", err)
|
|
}
|
|
readTo = readTo[:copied]
|
|
if got, want := copied, len(tc.readBytes); got != want {
|
|
t.Errorf("incorrect number of bytes copied returned in ReadToVV got: %d, want: %d, tc.vv: %+v", got, want, tc.vv)
|
|
}
|
|
if got, want := string(readTo), tc.readBytes; got != want {
|
|
t.Errorf("unexpected data in readTo got: %s, want: %s", got, want)
|
|
}
|
|
if got, want := tc.vv.Size(), inSize-copied; got != want {
|
|
t.Errorf("test VV has incorrect size after reading got: %d, want: %d, tc.vv: %+v", got, want, tc.vv)
|
|
}
|
|
if got, want := string(tc.vv.ToView()), tc.leftBytes; got != want {
|
|
t.Errorf("vv has incorrect data after Read got: %s, want: %s", got, want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
var pullUpTestCases = []struct {
|
|
comment string
|
|
in VectorisedView
|
|
count int
|
|
want []byte
|
|
result VectorisedView
|
|
ok bool
|
|
}{
|
|
{
|
|
comment: "simple case",
|
|
in: vv(2, "12"),
|
|
count: 1,
|
|
want: []byte("1"),
|
|
result: vv(2, "12"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "entire View",
|
|
in: vv(2, "1", "2"),
|
|
count: 1,
|
|
want: []byte("1"),
|
|
result: vv(2, "1", "2"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "spanning across two Views",
|
|
in: vv(3, "1", "23"),
|
|
count: 2,
|
|
want: []byte("12"),
|
|
result: vv(3, "12", "3"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "spanning across all Views",
|
|
in: vv(5, "1", "23", "45"),
|
|
count: 5,
|
|
want: []byte("12345"),
|
|
result: vv(5, "12345"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "count = 0",
|
|
in: vv(1, "1"),
|
|
count: 0,
|
|
want: []byte{},
|
|
result: vv(1, "1"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "count = size",
|
|
in: vv(1, "1"),
|
|
count: 1,
|
|
want: []byte("1"),
|
|
result: vv(1, "1"),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "count too large",
|
|
in: vv(3, "1", "23"),
|
|
count: 4,
|
|
want: nil,
|
|
result: vv(3, "1", "23"),
|
|
ok: false,
|
|
},
|
|
{
|
|
comment: "empty vv",
|
|
in: vv(0, ""),
|
|
count: 1,
|
|
want: nil,
|
|
result: vv(0, ""),
|
|
ok: false,
|
|
},
|
|
{
|
|
comment: "empty vv, count = 0",
|
|
in: vv(0, ""),
|
|
count: 0,
|
|
want: nil,
|
|
result: vv(0, ""),
|
|
ok: true,
|
|
},
|
|
{
|
|
comment: "empty views",
|
|
in: vv(3, "", "1", "", "23"),
|
|
count: 2,
|
|
want: []byte("12"),
|
|
result: vv(3, "12", "3"),
|
|
ok: true,
|
|
},
|
|
}
|
|
|
|
func TestPullUp(t *testing.T) {
|
|
for _, c := range pullUpTestCases {
|
|
got, ok := c.in.PullUp(c.count)
|
|
|
|
// Is the return value right?
|
|
if ok != c.ok {
|
|
t.Errorf("Test %q failed when calling PullUp(%d) on %v. Got an ok of %t. Want %t",
|
|
c.comment, c.count, c.in, ok, c.ok)
|
|
}
|
|
if bytes.Compare(got, View(c.want)) != 0 {
|
|
t.Errorf("Test %q failed when calling PullUp(%d) on %v. Got %v. Want %v",
|
|
c.comment, c.count, c.in, got, c.want)
|
|
}
|
|
|
|
// Is the underlying structure right?
|
|
if !reflect.DeepEqual(c.in, c.result) {
|
|
t.Errorf("Test %q failed when calling PullUp(%d). Got vv with structure %v. Wanted %v",
|
|
c.comment, c.count, c.in, c.result)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestToVectorisedView(t *testing.T) {
|
|
testCases := []struct {
|
|
in View
|
|
want VectorisedView
|
|
}{
|
|
{nil, VectorisedView{}},
|
|
{View{}, VectorisedView{}},
|
|
{View{'a'}, VectorisedView{size: 1, views: []View{{'a'}}}},
|
|
}
|
|
for _, tc := range testCases {
|
|
if got, want := tc.in.ToVectorisedView(), tc.want; !reflect.DeepEqual(got, want) {
|
|
t.Errorf("(%v).ToVectorisedView failed got: %+v, want: %+v", tc.in, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAppendView(t *testing.T) {
|
|
testCases := []struct {
|
|
vv VectorisedView
|
|
in View
|
|
want VectorisedView
|
|
}{
|
|
{VectorisedView{}, nil, VectorisedView{}},
|
|
{VectorisedView{}, View{}, VectorisedView{}},
|
|
{VectorisedView{[]View{{'a', 'b', 'c', 'd'}}, 4}, nil, VectorisedView{[]View{{'a', 'b', 'c', 'd'}}, 4}},
|
|
{VectorisedView{[]View{{'a', 'b', 'c', 'd'}}, 4}, View{}, VectorisedView{[]View{{'a', 'b', 'c', 'd'}}, 4}},
|
|
{VectorisedView{[]View{{'a', 'b', 'c', 'd'}}, 4}, View{'e'}, VectorisedView{[]View{{'a', 'b', 'c', 'd'}, {'e'}}, 5}},
|
|
}
|
|
for _, tc := range testCases {
|
|
tc.vv.AppendView(tc.in)
|
|
if got, want := tc.vv, tc.want; !reflect.DeepEqual(got, want) {
|
|
t.Errorf("(%v).ToVectorisedView failed got: %+v, want: %+v", tc.in, got, want)
|
|
}
|
|
}
|
|
}
|