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minio/pkg/s3select/sql/jsonpath_test.go

97 lines
2.6 KiB

/*
* MinIO Cloud Storage, (C) 2019 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 sql
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"reflect"
"testing"
"github.com/alecthomas/participle"
"github.com/bcicen/jstream"
)
func getJSONStructs(b []byte) ([]interface{}, error) {
dec := jstream.NewDecoder(bytes.NewBuffer(b), 0).ObjectAsKVS()
var result []interface{}
for parsedVal := range dec.Stream() {
result = append(result, parsedVal.Value)
}
if err := dec.Err(); err != nil {
return nil, err
}
return result, nil
}
func TestJsonpathEval(t *testing.T) {
f, err := os.Open(filepath.Join("jsondata", "books.json"))
if err != nil {
t.Fatal(err)
}
b, err := ioutil.ReadAll(f)
if err != nil {
t.Fatal(err)
}
p := participle.MustBuild(
&JSONPath{},
participle.Lexer(sqlLexer),
participle.CaseInsensitive("Keyword"),
)
cases := []struct {
str string
res []interface{}
}{
{"s.title", []interface{}{"Murder on the Orient Express", "The Robots of Dawn", "Pigs Have Wings"}},
{"s.authorInfo.yearRange", []interface{}{[]interface{}{1890.0, 1976.0}, []interface{}{1920.0, 1992.0}, []interface{}{1881.0, 1975.0}}},
{"s.authorInfo.name", []interface{}{"Agatha Christie", "Isaac Asimov", "P. G. Wodehouse"}},
{"s.authorInfo.yearRange[0]", []interface{}{1890.0, 1920.0, 1881.0}},
{"s.publicationHistory[0].pages", []interface{}{256.0, 336.0, nil}},
}
for i, tc := range cases {
jp := JSONPath{}
err := p.ParseString(tc.str, &jp)
// fmt.Println(jp)
if err != nil {
t.Fatalf("parse failed!: %d %v %s", i, err, tc)
}
// Read only the first json object from the file
recs, err := getJSONStructs(b)
if err != nil || len(recs) != 3 {
t.Fatalf("%v or length was not 3", err)
}
for j, rec := range recs {
// fmt.Println(rec)
r, err := jsonpathEval(jp.PathExpr, rec)
if err != nil {
t.Errorf("Error: %d %d %v", i, j, err)
}
if !reflect.DeepEqual(r, tc.res[j]) {
fmt.Printf("%#v (%v) != %v (%v)\n", r, reflect.TypeOf(r), tc.res[j], reflect.TypeOf(tc.res[j]))
t.Errorf("case: %d %d failed", i, j)
}
}
}
}