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parsed_json_test.go
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parsed_json_test.go
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/*
* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
*
* 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 simdjson
import (
"bytes"
"encoding/binary"
"encoding/json"
"io/ioutil"
"path/filepath"
"testing"
"github.com/klauspost/compress/zstd"
)
type tester interface {
Fatal(args ...interface{})
}
func loadCompressed(t tester, file string) (tape, sb, ref []byte) {
dec, err := zstd.NewReader(nil)
if err != nil {
t.Fatal(err)
}
tap, err := ioutil.ReadFile(filepath.Join("testdata", file+".tape.zst"))
if err != nil {
t.Fatal(err)
}
tap, err = dec.DecodeAll(tap, nil)
// Our end-of-root has been incremented by one (past last element) for quick skipping of ndjson
// So correct the initial root element to point to one position higher
binary.LittleEndian.PutUint64(tap, binary.LittleEndian.Uint64(tap)+1)
if err != nil {
t.Fatal(err)
}
sb, err = ioutil.ReadFile(filepath.Join("testdata", file+".stringbuf.zst"))
if err != nil {
t.Fatal(err)
}
sb, err = dec.DecodeAll(sb, nil)
if err != nil {
t.Fatal(err)
}
ref, err = ioutil.ReadFile(filepath.Join("testdata", file+".json.zst"))
if err != nil {
t.Fatal(err)
}
ref, err = dec.DecodeAll(ref, nil)
if err != nil {
t.Fatal(err)
}
return tap, sb, ref
}
var testCases = []struct {
name string
array bool
}{
{
name: "apache_builds",
},
{
name: "canada",
},
{
name: "citm_catalog",
},
{
name: "github_events",
array: true,
},
{
name: "gsoc-2018",
},
{
name: "instruments",
},
{
name: "numbers",
array: true,
},
{
name: "marine_ik",
},
{
name: "mesh",
},
{
name: "mesh.pretty",
},
{
name: "twitterescaped",
},
{
name: "twitter",
},
{
name: "random",
},
{
name: "update-center",
},
}
func bytesToUint64(buf []byte) []uint64 {
tape := make([]uint64, len(buf)/8)
for i := range tape {
tape[i] = binary.LittleEndian.Uint64(buf[i*8:])
}
return tape
}
func testCTapeCtoGoTapeCompare(t *testing.T, ctape []uint64, csbuf []byte, pj internalParsedJson) {
gotape := pj.Tape
cindex, goindex := 0, 0
for goindex < len(gotape) {
if cindex == len(ctape) {
t.Errorf("TestCTapeCtoGoTapeCompare: unexpected, ctape at end, but gotape not yet")
break
}
cval, goval := ctape[cindex], gotape[goindex]
// Make sure the type is the same between the C and Go version
if cval >> 56 != goval >> 56 {
t.Errorf("TestCTapeCtoGoTapeCompare: got: %02x want: %02x", goval >> 56, cval >> 56)
}
ntype := Tag(goval >> 56)
switch ntype {
case TagRoot, TagObjectStart, TagObjectEnd, TagArrayStart, TagArrayEnd:
cindex++
goindex++
case TagString:
cpayload := cval & JSONVALUEMASK
cstrlen := binary.LittleEndian.Uint32(csbuf[cpayload:cpayload+4])
cstr := string(csbuf[cpayload+4:cpayload+4+uint64(cstrlen)])
gostr, _ := pj.stringAt(goval & JSONVALUEMASK, gotape[goindex+1])
if cstr != gostr {
t.Errorf("TestCTapeCtoGoTapeCompare: got: %s want: %s", gostr, cstr)
}
cindex++
goindex += 2
case TagNull, TagBoolTrue, TagBoolFalse:
cindex++
goindex++
case TagInteger, TagFloat:
if ctape[cindex+1] != gotape[goindex+1] {
if !(ntype == TagFloat && GOLANG_NUMBER_PARSING) {
t.Errorf("TestCTapeCtoGoTapeCompare: got: %016x want: %016x", gotape[goindex+1], ctape[cindex+1])
}
}
cindex += 2
goindex += 2
default:
t.Errorf("TestCTapeCtoGoTapeCompare: unexpected token, got: %02x", ntype)
}
}
if cindex != len(ctape) {
t.Errorf("TestCTapeCtoGoTapeCompare: got: %d want: %d", cindex, len(ctape))
}
}
func TestVerifyTape(t *testing.T) {
for _, tt := range testCases {
t.Run(tt.name, func(t *testing.T) {
cbuf, csbuf, ref := loadCompressed(t, tt.name)
pj := internalParsedJson{}
if err := pj.parseMessage(ref); err != nil {
t.Errorf("parseMessage failed: %v\n", err)
return
}
ctape := bytesToUint64(cbuf)
testCTapeCtoGoTapeCompare(t, ctape, csbuf, pj)
})
}
}
func BenchmarkIter_MarshalJSONBuffer(b *testing.B) {
for _, tt := range testCases {
b.Run(tt.name, func(b *testing.B) {
tap, sb, _ := loadCompressed(b, tt.name)
pj, err := loadTape(bytes.NewBuffer(tap), bytes.NewBuffer(sb))
if err != nil {
b.Fatal(err)
}
iter := pj.Iter()
cpy := iter
output, err := cpy.MarshalJSON()
if err != nil {
b.Fatal(err)
}
b.SetBytes(int64(len(output)))
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
cpy := iter
output, err = cpy.MarshalJSONBuffer(output[:0])
if err != nil {
b.Fatal(err)
}
}
})
}
}
func BenchmarkGoMarshalJSON(b *testing.B) {
for _, tt := range testCases {
b.Run(tt.name, func(b *testing.B) {
_, _, ref := loadCompressed(b, tt.name)
var m interface{}
m = map[string]interface{}{}
if tt.array {
m = []interface{}{}
}
err := json.Unmarshal(ref, &m)
if err != nil {
b.Fatal(err)
}
output, err := json.Marshal(m)
if err != nil {
b.Fatal(err)
}
b.SetBytes(int64(len(output)))
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
output, err = json.Marshal(m)
if err != nil {
b.Fatal(err)
}
}
})
}
}
func TestPrintJson(t *testing.T) {
msg := []byte(demo_json)
expected := `{"Image":{"Width":800,"Height":600,"Title":"View from 15th Floor","Thumbnail":{"Url":"http://www.example.com/image/481989943","Height":125,"Width":100},"Animated":false,"IDs":[116,943,234,38793]}}`
pj := internalParsedJson{}
if err := pj.parseMessage(msg); err != nil {
t.Errorf("parseMessage failed\n")
}
iter := pj.Iter()
out, err := iter.MarshalJSON()
if err != nil {
t.Fatal(err)
}
if string(out) != expected {
t.Errorf("TestPrintJson: got: %s want: %s", out, expected)
}
}