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97 lines
2.6 KiB
97 lines
2.6 KiB
6 years ago
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/*
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* Minio Cloud Storage, (C) 2019 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sql
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"reflect"
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"testing"
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"github.com/alecthomas/participle"
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"github.com/bcicen/jstream"
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)
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func getJSONStructs(b []byte) ([]interface{}, error) {
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dec := jstream.NewDecoder(bytes.NewBuffer(b), 0).ObjectAsKVS()
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var result []interface{}
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for parsedVal := range dec.Stream() {
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result = append(result, parsedVal.Value)
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}
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if err := dec.Err(); err != nil {
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return nil, err
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}
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return result, nil
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}
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func TestJsonpathEval(t *testing.T) {
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f, err := os.Open(filepath.Join("jsondata", "books.json"))
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if err != nil {
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t.Fatal(err)
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}
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b, err := ioutil.ReadAll(f)
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if err != nil {
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t.Fatal(err)
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}
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p := participle.MustBuild(
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&JSONPath{},
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participle.Lexer(sqlLexer),
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participle.CaseInsensitive("Keyword"),
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)
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cases := []struct {
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str string
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res []interface{}
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}{
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{"s.title", []interface{}{"Murder on the Orient Express", "The Robots of Dawn", "Pigs Have Wings"}},
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{"s.authorInfo.yearRange", []interface{}{[]interface{}{1890.0, 1976.0}, []interface{}{1920.0, 1992.0}, []interface{}{1881.0, 1975.0}}},
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{"s.authorInfo.name", []interface{}{"Agatha Christie", "Isaac Asimov", "P. G. Wodehouse"}},
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{"s.authorInfo.yearRange[0]", []interface{}{1890.0, 1920.0, 1881.0}},
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{"s.publicationHistory[0].pages", []interface{}{256.0, 336.0, nil}},
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}
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for i, tc := range cases {
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jp := JSONPath{}
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err := p.ParseString(tc.str, &jp)
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// fmt.Println(jp)
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if err != nil {
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t.Fatalf("parse failed!: %d %v %s", i, err, tc)
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}
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// Read only the first json object from the file
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recs, err := getJSONStructs(b)
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if err != nil || len(recs) != 3 {
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t.Fatalf("%v or length was not 3", err)
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}
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for j, rec := range recs {
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// fmt.Println(rec)
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r, err := jsonpathEval(jp.PathExpr, rec)
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if err != nil {
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t.Errorf("Error: %d %d %v", i, j, err)
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}
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if !reflect.DeepEqual(r, tc.res[j]) {
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fmt.Printf("%#v (%v) != %v (%v)\n", r, reflect.TypeOf(r), tc.res[j], reflect.TypeOf(tc.res[j]))
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t.Errorf("case: %d %d failed", i, j)
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}
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}
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}
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}
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