/* Copyright 2015 The Kubernetes Authors. 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 jsonpath import ( "bytes" "encoding/json" "fmt" "reflect" "sort" "strings" "testing" ) type jsonpathTest struct { name string template string input interface{} expect string expectError bool } func testJSONPath(tests []jsonpathTest, allowMissingKeys bool, t *testing.T) { for _, test := range tests { j := New(test.name) j.AllowMissingKeys(allowMissingKeys) err := j.Parse(test.template) if err != nil { t.Errorf("in %s, parse %s error %v", test.name, test.template, err) } buf := new(bytes.Buffer) err = j.Execute(buf, test.input) if test.expectError { if test.expectError && err == nil { t.Errorf("in %s, expected execute error", test.name) } continue } else if err != nil { t.Errorf("in %s, execute error %v", test.name, err) } out := buf.String() if out != test.expect { t.Errorf(`in %s, expect to get "%s", got "%s"`, test.name, test.expect, out) } } } // testJSONPathSortOutput test cases related to map, the results may print in random order func testJSONPathSortOutput(tests []jsonpathTest, t *testing.T) { for _, test := range tests { j := New(test.name) err := j.Parse(test.template) if err != nil { t.Errorf("in %s, parse %s error %v", test.name, test.template, err) } buf := new(bytes.Buffer) err = j.Execute(buf, test.input) if err != nil { t.Errorf("in %s, execute error %v", test.name, err) } out := buf.String() //since map is visited in random order, we need to sort the results. sortedOut := strings.Fields(out) sort.Strings(sortedOut) sortedExpect := strings.Fields(test.expect) sort.Strings(sortedExpect) if !reflect.DeepEqual(sortedOut, sortedExpect) { t.Errorf(`in %s, expect to get "%s", got "%s"`, test.name, test.expect, out) } } } func testFailJSONPath(tests []jsonpathTest, t *testing.T) { for _, test := range tests { j := New(test.name) err := j.Parse(test.template) if err != nil { t.Errorf("in %s, parse %s error %v", test.name, test.template, err) } buf := new(bytes.Buffer) err = j.Execute(buf, test.input) var out string if err == nil { out = "nil" } else { out = err.Error() } if out != test.expect { t.Errorf("in %s, expect to get error %q, got %q", test.name, test.expect, out) } } } type book struct { Category string Author string Title string Price float32 } func (b book) String() string { return fmt.Sprintf("{Category: %s, Author: %s, Title: %s, Price: %v}", b.Category, b.Author, b.Title, b.Price) } type bicycle struct { Color string Price float32 IsNew bool } type empName string type job string type store struct { Book []book Bicycle []bicycle Name string Labels map[string]int Employees map[empName]job } func TestStructInput(t *testing.T) { storeData := store{ Name: "jsonpath", Book: []book{ {"reference", "Nigel Rees", "Sayings of the Centurey", 8.95}, {"fiction", "Evelyn Waugh", "Sword of Honour", 12.99}, {"fiction", "Herman Melville", "Moby Dick", 8.99}, }, Bicycle: []bicycle{ {"red", 19.95, true}, {"green", 20.01, false}, }, Labels: map[string]int{ "engieer": 10, "web/html": 15, "k8s-app": 20, }, Employees: map[empName]job{ "jason": "manager", "dan": "clerk", }, } storeTests := []jsonpathTest{ {"plain", "hello jsonpath", nil, "hello jsonpath", false}, {"recursive", "{..}", []int{1, 2, 3}, "[1 2 3]", false}, {"filter", "{[?(@<5)]}", []int{2, 6, 3, 7}, "2 3", false}, {"quote", `{"{"}`, nil, "{", false}, {"union", "{[1,3,4]}", []int{0, 1, 2, 3, 4}, "1 3 4", false}, {"array", "{[0:2]}", []string{"Monday", "Tudesday"}, "Monday Tudesday", false}, {"variable", "hello {.Name}", storeData, "hello jsonpath", false}, {"dict/", "{$.Labels.web/html}", storeData, "15", false}, {"dict/", "{$.Employees.jason}", storeData, "manager", false}, {"dict/", "{$.Employees.dan}", storeData, "clerk", false}, {"dict-", "{.Labels.k8s-app}", storeData, "20", false}, {"nest", "{.Bicycle[*].Color}", storeData, "red green", false}, {"allarray", "{.Book[*].Author}", storeData, "Nigel Rees Evelyn Waugh Herman Melville", false}, {"allfileds", "{.Bicycle.*}", storeData, "{red 19.95 true} {green 20.01 false}", false}, {"recurfileds", "{..Price}", storeData, "8.95 12.99 8.99 19.95 20.01", false}, {"lastarray", "{.Book[-1:]}", storeData, "{Category: fiction, Author: Herman Melville, Title: Moby Dick, Price: 8.99}", false}, {"recurarray", "{..Book[2]}", storeData, "{Category: fiction, Author: Herman Melville, Title: Moby Dick, Price: 8.99}", false}, {"bool", "{.Bicycle[?(@.IsNew==true)]}", storeData, "{red 19.95 true}", false}, } testJSONPath(storeTests, false, t) missingKeyTests := []jsonpathTest{ {"nonexistent field", "{.hello}", storeData, "", false}, } testJSONPath(missingKeyTests, true, t) failStoreTests := []jsonpathTest{ {"invalid identifier", "{hello}", storeData, "unrecognized identifier hello", false}, {"nonexistent field", "{.hello}", storeData, "hello is not found", false}, {"invalid array", "{.Labels[0]}", storeData, "map[string]int is not array or slice", false}, {"invalid filter operator", "{.Book[?(@.Price<>10)]}", storeData, "unrecognized filter operator <>", false}, {"redundant end", "{range .Labels.*}{@}{end}{end}", storeData, "not in range, nothing to end", false}, } testFailJSONPath(failStoreTests, t) } func TestJSONInput(t *testing.T) { var pointsJSON = []byte(`[ {"id": "i1", "x":4, "y":-5}, {"id": "i2", "x":-2, "y":-5, "z":1}, {"id": "i3", "x": 8, "y": 3 }, {"id": "i4", "x": -6, "y": -1 }, {"id": "i5", "x": 0, "y": 2, "z": 1 }, {"id": "i6", "x": 1, "y": 4 } ]`) var pointsData interface{} err := json.Unmarshal(pointsJSON, &pointsData) if err != nil { t.Error(err) } pointsTests := []jsonpathTest{ {"exists filter", "{[?(@.z)].id}", pointsData, "i2 i5", false}, {"bracket key", "{[0]['id']}", pointsData, "i1", false}, } testJSONPath(pointsTests, false, t) } // TestKubernetes tests some use cases from kubernetes func TestKubernetes(t *testing.T) { var input = []byte(`{ "kind": "List", "items":[ { "kind":"None", "metadata":{ "name":"127.0.0.1", "labels":{ "kubernetes.io/hostname":"127.0.0.1" } }, "status":{ "capacity":{"cpu":"4"}, "ready": true, "addresses":[{"type": "LegacyHostIP", "address":"127.0.0.1"}] } }, { "kind":"None", "metadata":{ "name":"127.0.0.2", "labels":{ "kubernetes.io/hostname":"127.0.0.2" } }, "status":{ "capacity":{"cpu":"8"}, "ready": false, "addresses":[ {"type": "LegacyHostIP", "address":"127.0.0.2"}, {"type": "another", "address":"127.0.0.3"} ] } } ], "users":[ { "name": "myself", "user": {} }, { "name": "e2e", "user": {"username": "admin", "password": "secret"} } ] }`) var nodesData interface{} err := json.Unmarshal(input, &nodesData) if err != nil { t.Error(err) } nodesTests := []jsonpathTest{ {"range item", `{range .items[*]}{.metadata.name}, {end}{.kind}`, nodesData, "127.0.0.1, 127.0.0.2, List", false}, {"range item with quote", `{range .items[*]}{.metadata.name}{"\t"}{end}`, nodesData, "127.0.0.1\t127.0.0.2\t", false}, {"range addresss", `{.items[*].status.addresses[*].address}`, nodesData, "127.0.0.1 127.0.0.2 127.0.0.3", false}, {"double range", `{range .items[*]}{range .status.addresses[*]}{.address}, {end}{end}`, nodesData, "127.0.0.1, 127.0.0.2, 127.0.0.3, ", false}, {"item name", `{.items[*].metadata.name}`, nodesData, "127.0.0.1 127.0.0.2", false}, {"union nodes capacity", `{.items[*]['metadata.name', 'status.capacity']}`, nodesData, "127.0.0.1 127.0.0.2 map[cpu:4] map[cpu:8]", false}, {"range nodes capacity", `{range .items[*]}[{.metadata.name}, {.status.capacity}] {end}`, nodesData, "[127.0.0.1, map[cpu:4]] [127.0.0.2, map[cpu:8]] ", false}, {"user password", `{.users[?(@.name=="e2e")].user.password}`, &nodesData, "secret", false}, {"hostname", `{.items[0].metadata.labels.kubernetes\.io/hostname}`, &nodesData, "127.0.0.1", false}, {"hostname filter", `{.items[?(@.metadata.labels.kubernetes\.io/hostname=="127.0.0.1")].kind}`, &nodesData, "None", false}, {"bool item", `{.items[?(@..ready==true)].metadata.name}`, &nodesData, "127.0.0.1", false}, } testJSONPath(nodesTests, false, t) randomPrintOrderTests := []jsonpathTest{ {"recursive name", "{..name}", nodesData, `127.0.0.1 127.0.0.2 myself e2e`, false}, } testJSONPathSortOutput(randomPrintOrderTests, t) } func TestFilterPartialMatchesSometimesMissingAnnotations(t *testing.T) { // for https://issues.k8s.io/45546 var input = []byte(`{ "kind": "List", "items": [ { "kind": "Pod", "metadata": { "name": "pod1", "annotations": { "color": "blue" } } }, { "kind": "Pod", "metadata": { "name": "pod2" } }, { "kind": "Pod", "metadata": { "name": "pod3", "annotations": { "color": "green" } } }, { "kind": "Pod", "metadata": { "name": "pod4", "annotations": { "color": "blue" } } } ] }`) var data interface{} err := json.Unmarshal(input, &data) if err != nil { t.Fatal(err) } testJSONPath( []jsonpathTest{ { "filter, should only match a subset, some items don't have annotations, tolerate missing items", `{.items[?(@.metadata.annotations.color=="blue")].metadata.name}`, data, "pod1 pod4", false, // expect no error }, }, true, // allow missing keys t, ) testJSONPath( []jsonpathTest{ { "filter, should only match a subset, some items don't have annotations, error on missing items", `{.items[?(@.metadata.annotations.color=="blue")].metadata.name}`, data, "", true, // expect an error }, }, false, // don't allow missing keys t, ) }