github.com/vanus-labs/vanus/lib@v0.0.0-20231221070800-1334a7b9605e/json/path/parse_test.go (about)

     1  // Copyright 2023 Linkall Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package path
    16  
    17  import (
    18  	// standard libraries.
    19  	"strings"
    20  	"testing"
    21  
    22  	// third-party libraries.
    23  	. "github.com/smartystreets/goconvey/convey"
    24  
    25  	// this project.
    26  	"github.com/vanus-labs/vanus/lib/bytes"
    27  )
    28  
    29  func TestParse_consumeSliceSelector(t *testing.T) {
    30  	buildScanner := func(sliceSelector string) *bytes.MarkScanner {
    31  		s := bytes.NewMarkScanner([]byte(sliceSelector))
    32  		m := strings.Index(sliceSelector, ":") + 1
    33  		_ = s.Resume(m)
    34  		return s
    35  	}
    36  
    37  	soResult := func(selector, expect *arraySliceSelector) {
    38  		if expect.start == nil {
    39  			So(selector.start, ShouldBeNil)
    40  		} else {
    41  			So(selector.start, ShouldNotBeNil)
    42  			So(*selector.start, ShouldEqual, *expect.start)
    43  		}
    44  		if expect.end == nil {
    45  			So(selector.end, ShouldBeNil)
    46  		} else {
    47  			So(selector.end, ShouldNotBeNil)
    48  			So(*selector.end, ShouldEqual, *expect.end)
    49  		}
    50  		So(selector.step, ShouldEqual, expect.step)
    51  	}
    52  
    53  	newInt := func(i int) *int {
    54  		return &i
    55  	}
    56  
    57  	cases := []struct {
    58  		seg    string
    59  		expect *arraySliceSelector
    60  	}{
    61  		{"[ : ]", &arraySliceSelector{start: nil, end: nil, step: 1}},
    62  		{"[ : : ]", &arraySliceSelector{start: nil, end: nil, step: 1}},
    63  		{"[ : : -1 ]", &arraySliceSelector{start: nil, end: nil, step: -1}},
    64  		{"[ 0 : : ]", &arraySliceSelector{start: newInt(0), end: nil, step: 1}},
    65  		{"[ : 0 : ]", &arraySliceSelector{start: nil, end: newInt(0), step: 1}},
    66  		{"[ 1 : 3 ]", &arraySliceSelector{start: newInt(1), end: newInt(3), step: 1}},
    67  		{"[ 1 : 5 : 2 ]", &arraySliceSelector{start: newInt(1), end: newInt(5), step: 2}},
    68  		{"[ 5 : 1 : -2 ]", &arraySliceSelector{start: newInt(5), end: newInt(1), step: -2}},
    69  	}
    70  
    71  	for i := range cases {
    72  		c := &cases[i]
    73  
    74  		Convey("parse array slice selector: "+c.seg, t, func() {
    75  			s := buildScanner(c.seg)
    76  
    77  			selector, err := consumeSliceSelector(c.expect.start, s)
    78  			So(err, ShouldBeNil)
    79  			So(s.Mark(0), ShouldEqual, len(c.seg)-2)
    80  			soResult(selector, c.expect)
    81  		})
    82  	}
    83  }
    84  
    85  func TestParse_ConsumeSegments(t *testing.T) {
    86  	Convey("parse", t, func() {
    87  		jp := "$.foo['bar'].baz[0].qux"
    88  		s := bytes.NewMarkScanner([]byte(jp))
    89  		s.Resume(1)
    90  
    91  		segments, err := ConsumeSegments(s)
    92  		So(err, ShouldBeNil)
    93  		So(s.Mark(0), ShouldEqual, len(jp))
    94  		So(segments, ShouldHaveLength, 5)
    95  	})
    96  }