282 lines
8.3 KiB
Go
282 lines
8.3 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 jsonpath
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"reflect"
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"sort"
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"strings"
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"testing"
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)
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type jsonpathTest struct {
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name string
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template string
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input interface{}
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expect string
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}
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func testJSONPath(tests []jsonpathTest, allowMissingKeys bool, t *testing.T) {
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for _, test := range tests {
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j := New(test.name)
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j.AllowMissingKeys(allowMissingKeys)
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err := j.Parse(test.template)
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if err != nil {
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t.Errorf("in %s, parse %s error %v", test.name, test.template, err)
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}
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buf := new(bytes.Buffer)
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err = j.Execute(buf, test.input)
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if err != nil {
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t.Errorf("in %s, execute error %v", test.name, err)
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}
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out := buf.String()
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if out != test.expect {
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t.Errorf(`in %s, expect to get "%s", got "%s"`, test.name, test.expect, out)
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}
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}
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}
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// testJSONPathSortOutput test cases related to map, the results may print in random order
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func testJSONPathSortOutput(tests []jsonpathTest, t *testing.T) {
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for _, test := range tests {
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j := New(test.name)
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err := j.Parse(test.template)
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if err != nil {
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t.Errorf("in %s, parse %s error %v", test.name, test.template, err)
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}
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buf := new(bytes.Buffer)
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err = j.Execute(buf, test.input)
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if err != nil {
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t.Errorf("in %s, execute error %v", test.name, err)
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}
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out := buf.String()
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//since map is visited in random order, we need to sort the results.
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sortedOut := strings.Fields(out)
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sort.Strings(sortedOut)
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sortedExpect := strings.Fields(test.expect)
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sort.Strings(sortedExpect)
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if !reflect.DeepEqual(sortedOut, sortedExpect) {
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t.Errorf(`in %s, expect to get "%s", got "%s"`, test.name, test.expect, out)
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}
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}
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}
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func testFailJSONPath(tests []jsonpathTest, t *testing.T) {
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for _, test := range tests {
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j := New(test.name)
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err := j.Parse(test.template)
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if err != nil {
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t.Errorf("in %s, parse %s error %v", test.name, test.template, err)
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}
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buf := new(bytes.Buffer)
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err = j.Execute(buf, test.input)
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var out string
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if err == nil {
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out = "nil"
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} else {
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out = err.Error()
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}
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if out != test.expect {
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t.Errorf("in %s, expect to get error %q, got %q", test.name, test.expect, out)
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}
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}
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}
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type book struct {
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Category string
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Author string
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Title string
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Price float32
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}
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func (b book) String() string {
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return fmt.Sprintf("{Category: %s, Author: %s, Title: %s, Price: %v}", b.Category, b.Author, b.Title, b.Price)
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}
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type bicycle struct {
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Color string
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Price float32
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}
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type empName string
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type job string
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type store struct {
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Book []book
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Bicycle bicycle
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Name string
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Labels map[string]int
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Employees map[empName]job
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}
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func TestStructInput(t *testing.T) {
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storeData := store{
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Name: "jsonpath",
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Book: []book{
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{"reference", "Nigel Rees", "Sayings of the Centurey", 8.95},
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{"fiction", "Evelyn Waugh", "Sword of Honour", 12.99},
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{"fiction", "Herman Melville", "Moby Dick", 8.99},
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},
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Bicycle: bicycle{"red", 19.95},
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Labels: map[string]int{
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"engieer": 10,
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"web/html": 15,
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"k8s-app": 20,
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},
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Employees: map[empName]job{
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"jason": "manager",
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"dan": "clerk",
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},
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}
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storeTests := []jsonpathTest{
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{"plain", "hello jsonpath", nil, "hello jsonpath"},
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{"recursive", "{..}", []int{1, 2, 3}, "[1 2 3]"},
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{"filter", "{[?(@<5)]}", []int{2, 6, 3, 7}, "2 3"},
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{"quote", `{"{"}`, nil, "{"},
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{"union", "{[1,3,4]}", []int{0, 1, 2, 3, 4}, "1 3 4"},
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{"array", "{[0:2]}", []string{"Monday", "Tudesday"}, "Monday Tudesday"},
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{"variable", "hello {.Name}", storeData, "hello jsonpath"},
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{"dict/", "{$.Labels.web/html}", storeData, "15"},
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{"dict/", "{$.Employees.jason}", storeData, "manager"},
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{"dict/", "{$.Employees.dan}", storeData, "clerk"},
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{"dict-", "{.Labels.k8s-app}", storeData, "20"},
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{"nest", "{.Bicycle.Color}", storeData, "red"},
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{"allarray", "{.Book[*].Author}", storeData, "Nigel Rees Evelyn Waugh Herman Melville"},
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{"allfileds", "{.Bicycle.*}", storeData, "red 19.95"},
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{"recurfileds", "{..Price}", storeData, "8.95 12.99 8.99 19.95"},
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{"lastarray", "{.Book[-1:]}", storeData,
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"{Category: fiction, Author: Herman Melville, Title: Moby Dick, Price: 8.99}"},
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{"recurarray", "{..Book[2]}", storeData,
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"{Category: fiction, Author: Herman Melville, Title: Moby Dick, Price: 8.99}"},
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}
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testJSONPath(storeTests, false, t)
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missingKeyTests := []jsonpathTest{
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{"nonexistent field", "{.hello}", storeData, ""},
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}
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testJSONPath(missingKeyTests, true, t)
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failStoreTests := []jsonpathTest{
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{"invalid identifier", "{hello}", storeData, "unrecognized identifier hello"},
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{"nonexistent field", "{.hello}", storeData, "hello is not found"},
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{"invalid array", "{.Labels[0]}", storeData, "map[string]int is not array or slice"},
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{"invalid filter operator", "{.Book[?(@.Price<>10)]}", storeData, "unrecognized filter operator <>"},
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{"redundent end", "{range .Labels.*}{@}{end}{end}", storeData, "not in range, nothing to end"},
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}
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testFailJSONPath(failStoreTests, t)
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}
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func TestJSONInput(t *testing.T) {
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var pointsJSON = []byte(`[
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{"id": "i1", "x":4, "y":-5},
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{"id": "i2", "x":-2, "y":-5, "z":1},
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{"id": "i3", "x": 8, "y": 3 },
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{"id": "i4", "x": -6, "y": -1 },
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{"id": "i5", "x": 0, "y": 2, "z": 1 },
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{"id": "i6", "x": 1, "y": 4 }
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]`)
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var pointsData interface{}
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err := json.Unmarshal(pointsJSON, &pointsData)
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if err != nil {
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t.Error(err)
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}
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pointsTests := []jsonpathTest{
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{"exists filter", "{[?(@.z)].id}", pointsData, "i2 i5"},
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{"bracket key", "{[0]['id']}", pointsData, "i1"},
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}
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testJSONPath(pointsTests, false, t)
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}
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// TestKubernetes tests some use cases from kubernetes
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func TestKubernetes(t *testing.T) {
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var input = []byte(`{
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"kind": "List",
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"items":[
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{
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"kind":"None",
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"metadata":{
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"name":"127.0.0.1",
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"labels":{
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"kubernetes.io/hostname":"127.0.0.1"
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}
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},
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"status":{
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"capacity":{"cpu":"4"},
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"addresses":[{"type": "LegacyHostIP", "address":"127.0.0.1"}]
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}
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},
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{
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"kind":"None",
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"metadata":{
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"name":"127.0.0.2",
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"labels":{
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"kubernetes.io/hostname":"127.0.0.2"
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}
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},
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"status":{
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"capacity":{"cpu":"8"},
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"addresses":[
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{"type": "LegacyHostIP", "address":"127.0.0.2"},
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{"type": "another", "address":"127.0.0.3"}
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]
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}
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}
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],
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"users":[
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{
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"name": "myself",
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"user": {}
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},
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{
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"name": "e2e",
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"user": {"username": "admin", "password": "secret"}
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}
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]
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}`)
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var nodesData interface{}
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err := json.Unmarshal(input, &nodesData)
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if err != nil {
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t.Error(err)
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}
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nodesTests := []jsonpathTest{
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{"range item", `{range .items[*]}{.metadata.name}, {end}{.kind}`, nodesData, "127.0.0.1, 127.0.0.2, List"},
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{"range item with quote", `{range .items[*]}{.metadata.name}{"\t"}{end}`, nodesData, "127.0.0.1\t127.0.0.2\t"},
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{"range addresss", `{.items[*].status.addresses[*].address}`, nodesData,
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"127.0.0.1 127.0.0.2 127.0.0.3"},
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{"double range", `{range .items[*]}{range .status.addresses[*]}{.address}, {end}{end}`, nodesData,
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"127.0.0.1, 127.0.0.2, 127.0.0.3, "},
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{"item name", `{.items[*].metadata.name}`, nodesData, "127.0.0.1 127.0.0.2"},
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{"union nodes capacity", `{.items[*]['metadata.name', 'status.capacity']}`, nodesData,
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"127.0.0.1 127.0.0.2 map[cpu:4] map[cpu:8]"},
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{"range nodes capacity", `{range .items[*]}[{.metadata.name}, {.status.capacity}] {end}`, nodesData,
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"[127.0.0.1, map[cpu:4]] [127.0.0.2, map[cpu:8]] "},
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{"user password", `{.users[?(@.name=="e2e")].user.password}`, &nodesData, "secret"},
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{"hostname", `{.items[0].metadata.labels.kubernetes\.io/hostname}`, &nodesData, "127.0.0.1"},
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{"hostname filter", `{.items[?(@.metadata.labels.kubernetes\.io/hostname=="127.0.0.1")].kind}`, &nodesData, "None"},
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}
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testJSONPath(nodesTests, false, t)
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randomPrintOrderTests := []jsonpathTest{
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{"recursive name", "{..name}", nodesData, `127.0.0.1 127.0.0.2 myself e2e`},
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}
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testJSONPathSortOutput(randomPrintOrderTests, t)
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}
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