mirror of https://github.com/k3s-io/k3s
godeps: add evanphx/json-patch
Mike Danese
parent
5269e06aa1
commit
a22a133ca1
|
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@ -116,6 +116,10 @@
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"Comment": "v1.1.2-50-g692a500",
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"Rev": "692a50017a7049b26cf7ea4ccfc0d8c77369a793"
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},
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{
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"ImportPath": "github.com/evanphx/json-patch",
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"Rev": "7dd4489c2eb6073e5a9d7746c3274c5b5f0387df"
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},
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{
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"ImportPath": "github.com/fsouza/go-dockerclient",
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"Rev": "d19717788084716e4adff0515be6289aa04bec46"
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@ -155,15 +159,15 @@
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"Comment": "0.1.3-8-g6633656",
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"Rev": "6633656539c1639d9d78127b7d47c622b5d7b6dc"
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},
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{
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"ImportPath": "github.com/matttproud/golang_protobuf_extensions/ext",
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"Rev": "7a864a042e844af638df17ebbabf8183dace556a"
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},
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{
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"ImportPath": "github.com/kr/pty",
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"Comment": "release.r56-25-g05017fc",
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"Rev": "05017fcccf23c823bfdea560dcc958a136e54fb7"
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},
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{
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"ImportPath": "github.com/matttproud/golang_protobuf_extensions/ext",
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"Rev": "7a864a042e844af638df17ebbabf8183dace556a"
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},
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{
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"ImportPath": "github.com/miekg/dns",
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"Rev": "3f504e8dabd5d562e997d19ce0200aa41973e1b2"
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@ -0,0 +1,14 @@
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language: go
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go:
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- 1.4
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- 1.3
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install:
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- if ! go get code.google.com/p/go.tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
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script:
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- go test -cover ./...
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notifications:
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email: false
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@ -0,0 +1,25 @@
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Copyright (c) 2014, Evan Phoenix
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the Evan Phoenix nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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@ -0,0 +1,29 @@
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## JSON-Patch
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Provides the abiilty to modify and test a JSON according to a
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[RFC6902 JSON patch](http://tools.ietf.org/html/rfc6902) and [RFC7386 JSON Merge Patch](https://tools.ietf.org/html/rfc7386).
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*Version*: **1.0**
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[](http://godoc.org/github.com/evanphx/json-patch)
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[](https://travis-ci.org/evanphx/json-patch)
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### API Usage
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* Given a `[]byte`, obtain a Patch object
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`obj, err := jsonpatch.DecodePatch(patch)`
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* Apply the patch and get a new document back
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`out, err := obj.Apply(doc)`
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* Create a JSON Merge Patch document based on two json documents (a to b):
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`mergeDoc, err := jsonpatch.CreateMergePatch(a, b)`
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* Bonus API: compare documents for structural equality
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`jsonpatch.Equal(doca, docb)`
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@ -0,0 +1,280 @@
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package jsonpatch
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import (
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"encoding/json"
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"fmt"
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"reflect"
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)
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func merge(cur, patch *lazyNode) *lazyNode {
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curDoc, err := cur.intoDoc()
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if err != nil {
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pruneNulls(patch)
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return patch
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}
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patchDoc, err := patch.intoDoc()
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if err != nil {
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return patch
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}
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mergeDocs(curDoc, patchDoc)
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return cur
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}
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func mergeDocs(doc, patch *partialDoc) {
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for k, v := range *patch {
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if v == nil {
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delete(*doc, k)
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} else {
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cur, ok := (*doc)[k]
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if !ok || cur == nil {
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pruneNulls(v)
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(*doc)[k] = v
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} else {
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(*doc)[k] = merge(cur, v)
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}
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}
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}
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}
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func pruneNulls(n *lazyNode) {
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sub, err := n.intoDoc()
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if err == nil {
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pruneDocNulls(sub)
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} else {
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ary, err := n.intoAry()
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if err == nil {
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pruneAryNulls(ary)
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}
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}
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}
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func pruneDocNulls(doc *partialDoc) *partialDoc {
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for k, v := range *doc {
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if v == nil {
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delete(*doc, k)
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} else {
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pruneNulls(v)
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}
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}
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return doc
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}
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func pruneAryNulls(ary *partialArray) *partialArray {
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var newAry []*lazyNode
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for _, v := range *ary {
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if v != nil {
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pruneNulls(v)
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newAry = append(newAry, v)
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}
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}
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*ary = newAry
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return ary
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}
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var errBadJSONDoc = fmt.Errorf("Invalid JSON Document")
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var errBadJSONPatch = fmt.Errorf("Invalid JSON Patch")
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// MergePatch merges the patchData into the docData.
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func MergePatch(docData, patchData []byte) ([]byte, error) {
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doc := &partialDoc{}
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docErr := json.Unmarshal(docData, doc)
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patch := &partialDoc{}
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patchErr := json.Unmarshal(patchData, patch)
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if _, ok := docErr.(*json.SyntaxError); ok {
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return nil, errBadJSONDoc
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}
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if _, ok := patchErr.(*json.SyntaxError); ok {
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return nil, errBadJSONPatch
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}
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if docErr == nil && *doc == nil {
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return nil, errBadJSONDoc
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}
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if patchErr == nil && *patch == nil {
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return nil, errBadJSONPatch
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}
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if docErr != nil || patchErr != nil {
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// Not an error, just not a doc, so we turn straight into the patch
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if patchErr == nil {
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doc = pruneDocNulls(patch)
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} else {
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patchAry := &partialArray{}
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patchErr = json.Unmarshal(patchData, patchAry)
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if patchErr != nil {
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return nil, errBadJSONPatch
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}
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pruneAryNulls(patchAry)
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out, patchErr := json.Marshal(patchAry)
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if patchErr != nil {
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return nil, errBadJSONPatch
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}
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return out, nil
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}
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} else {
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mergeDocs(doc, patch)
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}
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return json.Marshal(doc)
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}
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// CreateMergePatch creates a merge patch as specified in http://tools.ietf.org/html/draft-ietf-appsawg-json-merge-patch-07
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//
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// 'a' is original, 'b' is the modified document. Both are to be given as json encoded content.
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// The function will return a mergeable json document with differences from a to b.
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//
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// An error will be returned if any of the two documents are invalid.
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func CreateMergePatch(a, b []byte) ([]byte, error) {
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aI := map[string]interface{}{}
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bI := map[string]interface{}{}
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err := json.Unmarshal(a, &aI)
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if err != nil {
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return nil, errBadJSONDoc
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}
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err = json.Unmarshal(b, &bI)
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if err != nil {
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return nil, errBadJSONDoc
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}
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dest, err := getDiff(aI, bI)
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if err != nil {
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return nil, err
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}
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return json.Marshal(dest)
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}
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// Returns true if the array matches (must be json types).
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// As is idiomatic for go, an empty array is not the same as a nil array.
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func matchesArray(a, b []interface{}) bool {
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if len(a) != len(b) {
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return false
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}
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if (a == nil && b != nil) || (a != nil && b == nil) {
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return false
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}
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for i := range a {
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if !matchesValue(a[i], b[i]) {
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return false
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}
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}
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return true
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}
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// Returns true if the values matches (must be json types)
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// The types of the values must match, otherwise it will always return false
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// If two map[string]interface{} are given, all elements must match.
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func matchesValue(av, bv interface{}) bool {
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if reflect.TypeOf(av) != reflect.TypeOf(bv) {
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return false
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}
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switch at := av.(type) {
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case string:
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bt := bv.(string)
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if bt == at {
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return true
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}
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case float64:
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bt := bv.(float64)
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if bt == at {
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return true
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}
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case bool:
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bt := bv.(bool)
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if bt == at {
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return true
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}
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case map[string]interface{}:
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bt := bv.(map[string]interface{})
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for key := range at {
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if !matchesValue(at[key], bt[key]) {
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return false
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}
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}
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for key := range bt {
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if !matchesValue(at[key], bt[key]) {
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return false
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}
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}
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return true
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}
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return false
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}
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// getDiff returns the (recursive) difference between a and b as a map[string]interface{}.
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func getDiff(a, b map[string]interface{}) (map[string]interface{}, error) {
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into := map[string]interface{}{}
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for key, bv := range b {
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av, ok := a[key]
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// value was added
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if !ok {
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into[key] = bv
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continue
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}
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// If types have changed, replace completely
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if reflect.TypeOf(av) != reflect.TypeOf(bv) {
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into[key] = bv
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continue
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}
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// Types are the same, compare values
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switch at := av.(type) {
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case map[string]interface{}:
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bt := bv.(map[string]interface{})
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dst := make(map[string]interface{}, len(bt))
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dst, err := getDiff(at, bt)
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if err != nil {
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return nil, err
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}
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if len(dst) > 0 {
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into[key] = dst
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}
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case string, float64, bool:
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if !matchesValue(av, bv) {
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into[key] = bv
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}
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case []interface{}:
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bt := bv.([]interface{})
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if !matchesArray(at, bt) {
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into[key] = bv
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}
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case nil:
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switch bv.(type) {
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case nil:
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// Both nil, fine.
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default:
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into[key] = bv
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}
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default:
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panic(fmt.Sprintf("Unknown type:%T in key %s", av, key))
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}
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}
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// Now add all deleted values as nil
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for key := range a {
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_, found := b[key]
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if !found {
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into[key] = nil
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}
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}
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return into, nil
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}
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322
Godeps/_workspace/src/github.com/evanphx/json-patch/merge_test.go
generated
vendored
Normal file
322
Godeps/_workspace/src/github.com/evanphx/json-patch/merge_test.go
generated
vendored
Normal file
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@ -0,0 +1,322 @@
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package jsonpatch
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import (
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"strings"
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"testing"
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)
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func mergePatch(doc, patch string) string {
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out, err := MergePatch([]byte(doc), []byte(patch))
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if err != nil {
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panic(err)
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}
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return string(out)
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}
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func TestMergePatchReplaceKey(t *testing.T) {
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doc := `{ "title": "hello" }`
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pat := `{ "title": "goodbye" }`
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res := mergePatch(doc, pat)
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if !compareJSON(pat, res) {
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t.Fatalf("Key was not replaced")
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}
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}
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func TestMergePatchIgnoresOtherValues(t *testing.T) {
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doc := `{ "title": "hello", "age": 18 }`
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pat := `{ "title": "goodbye" }`
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res := mergePatch(doc, pat)
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exp := `{ "title": "goodbye", "age": 18 }`
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if !compareJSON(exp, res) {
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t.Fatalf("Key was not replaced")
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}
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}
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func TestMergePatchNilDoc(t *testing.T) {
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doc := `{ "title": null }`
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pat := `{ "title": {"foo": "bar"} }`
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res := mergePatch(doc, pat)
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exp := `{ "title": {"foo": "bar"} }`
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if !compareJSON(exp, res) {
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t.Fatalf("Key was not replaced")
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}
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}
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func TestMergePatchRecursesIntoObjects(t *testing.T) {
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doc := `{ "person": { "title": "hello", "age": 18 } }`
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pat := `{ "person": { "title": "goodbye" } }`
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res := mergePatch(doc, pat)
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exp := `{ "person": { "title": "goodbye", "age": 18 } }`
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if !compareJSON(exp, res) {
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t.Fatalf("Key was not replaced")
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}
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}
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type nonObjectCases struct {
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doc, pat, res string
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}
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func TestMergePatchReplacesNonObjectsWholesale(t *testing.T) {
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a1 := `[1]`
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a2 := `[2]`
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o1 := `{ "a": 1 }`
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o2 := `{ "a": 2 }`
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o3 := `{ "a": 1, "b": 1 }`
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o4 := `{ "a": 2, "b": 1 }`
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cases := []nonObjectCases{
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{a1, a2, a2},
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{o1, a2, a2},
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{a1, o1, o1},
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{o3, o2, o4},
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}
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for _, c := range cases {
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act := mergePatch(c.doc, c.pat)
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if !compareJSON(c.res, act) {
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t.Errorf("whole object replacement failed")
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}
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}
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}
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func TestMergePatchReturnsErrorOnBadJSON(t *testing.T) {
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_, err := MergePatch([]byte(`[[[[`), []byte(`1`))
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if err == nil {
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t.Errorf("Did not return an error for bad json: %s", err)
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}
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_, err = MergePatch([]byte(`1`), []byte(`[[[[`))
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if err == nil {
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t.Errorf("Did not return an error for bad json: %s", err)
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}
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}
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var rfcTests = []struct {
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target string
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patch string
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expected string
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}{
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// test cases from https://tools.ietf.org/html/rfc7386#appendix-A
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{target: `{"a":"b"}`, patch: `{"a":"c"}`, expected: `{"a":"c"}`},
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{target: `{"a":"b"}`, patch: `{"b":"c"}`, expected: `{"a":"b","b":"c"}`},
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{target: `{"a":"b"}`, patch: `{"a":null}`, expected: `{}`},
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{target: `{"a":"b","b":"c"}`, patch: `{"a":null}`, expected: `{"b":"c"}`},
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{target: `{"a":["b"]}`, patch: `{"a":"c"}`, expected: `{"a":"c"}`},
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{target: `{"a":"c"}`, patch: `{"a":["b"]}`, expected: `{"a":["b"]}`},
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{target: `{"a":{"b": "c"}}`, patch: `{"a": {"b": "d","c": null}}`, expected: `{"a":{"b":"d"}}`},
|
||||
{target: `{"a":[{"b":"c"}]}`, patch: `{"a":[1]}`, expected: `{"a":[1]}`},
|
||||
{target: `["a","b"]`, patch: `["c","d"]`, expected: `["c","d"]`},
|
||||
{target: `{"a":"b"}`, patch: `["c"]`, expected: `["c"]`},
|
||||
// {target: `{"a":"foo"}`, patch: `null`, expected: `null`},
|
||||
// {target: `{"a":"foo"}`, patch: `"bar"`, expected: `"bar"`},
|
||||
{target: `{"e":null}`, patch: `{"a":1}`, expected: `{"a":1,"e":null}`},
|
||||
{target: `[1,2]`, patch: `{"a":"b","c":null}`, expected: `{"a":"b"}`},
|
||||
{target: `{}`, patch: `{"a":{"bb":{"ccc":null}}}`, expected: `{"a":{"bb":{}}}`},
|
||||
}
|
||||
|
||||
func TestMergePatchRFCCases(t *testing.T) {
|
||||
for i, c := range rfcTests {
|
||||
out := mergePatch(c.target, c.patch)
|
||||
|
||||
if !compareJSON(out, c.expected) {
|
||||
t.Errorf("case[%d], patch '%s' did not apply properly to '%s'. expected:\n'%s'\ngot:\n'%s'", i, c.patch, c.target, c.expected, out)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var rfcFailTests = `
|
||||
{"a":"foo"} | null
|
||||
{"a":"foo"} | "bar"
|
||||
`
|
||||
|
||||
func TestMergePatchFailRFCCases(t *testing.T) {
|
||||
tests := strings.Split(rfcFailTests, "\n")
|
||||
|
||||
for _, c := range tests {
|
||||
if strings.TrimSpace(c) == "" {
|
||||
continue
|
||||
}
|
||||
|
||||
parts := strings.SplitN(c, "|", 2)
|
||||
|
||||
doc := strings.TrimSpace(parts[0])
|
||||
pat := strings.TrimSpace(parts[1])
|
||||
|
||||
out, err := MergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != errBadJSONPatch {
|
||||
t.Errorf("error not returned properly: %s, %s", err, string(out))
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func TestMergeReplaceKey(t *testing.T) {
|
||||
doc := `{ "title": "hello", "nested": {"one": 1, "two": 2} }`
|
||||
pat := `{ "title": "goodbye", "nested": {"one": 2, "two": 2} }`
|
||||
|
||||
exp := `{ "title": "goodbye", "nested": {"one": 2} }`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
if !compareJSON(exp, string(res)) {
|
||||
t.Fatalf("Key was not replaced")
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeGetArray(t *testing.T) {
|
||||
doc := `{ "title": "hello", "array": ["one", "two"], "notmatch": [1, 2, 3] }`
|
||||
pat := `{ "title": "hello", "array": ["one", "two", "three"], "notmatch": [1, 2, 3] }`
|
||||
|
||||
exp := `{ "array": ["one", "two", "three"] }`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
if !compareJSON(exp, string(res)) {
|
||||
t.Fatalf("Array was not added")
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeGetObjArray(t *testing.T) {
|
||||
doc := `{ "title": "hello", "array": [{"banana": true}, {"evil": false}], "notmatch": [{"one":1}, {"two":2}, {"three":3}] }`
|
||||
pat := `{ "title": "hello", "array": [{"banana": false}, {"evil": true}], "notmatch": [{"one":1}, {"two":2}, {"three":3}] }`
|
||||
|
||||
exp := `{ "array": [{"banana": false}, {"evil": true}] }`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
if !compareJSON(exp, string(res)) {
|
||||
t.Fatalf("Object array was not added")
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeDeleteKey(t *testing.T) {
|
||||
doc := `{ "title": "hello", "nested": {"one": 1, "two": 2} }`
|
||||
pat := `{ "title": "hello", "nested": {"one": 1} }`
|
||||
|
||||
exp := `{"nested":{"two":null}}`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
// We cannot use "compareJSON", since Equals does not report a difference if the value is null
|
||||
if exp != string(res) {
|
||||
t.Fatalf("Key was not removed")
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeEmptyArray(t *testing.T) {
|
||||
doc := `{ "array": null }`
|
||||
pat := `{ "array": [] }`
|
||||
|
||||
exp := `{"array":[]}`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(pat))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
// We cannot use "compareJSON", since Equals does not report a difference if the value is null
|
||||
if exp != string(res) {
|
||||
t.Fatalf("Key was not removed")
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeObjArray(t *testing.T) {
|
||||
doc := `{ "array": [ {"a": {"b": 2}}, {"a": {"b": 3}} ]}`
|
||||
exp := `{}`
|
||||
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(doc))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
// We cannot use "compareJSON", since Equals does not report a difference if the value is null
|
||||
if exp != string(res) {
|
||||
t.Fatalf("Array was not empty, was " + string(res))
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeComplexMatch(t *testing.T) {
|
||||
doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
|
||||
empty := `{}`
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(doc))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
// We cannot use "compareJSON", since Equals does not report a difference if the value is null
|
||||
if empty != string(res) {
|
||||
t.Fatalf("Did not get empty result, was:%s", string(res))
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeComplexAddAll(t *testing.T) {
|
||||
doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
|
||||
empty := `{}`
|
||||
res, err := CreateMergePatch([]byte(empty), []byte(doc))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
if !compareJSON(doc, string(res)) {
|
||||
t.Fatalf("Did not get everything as, it was:\n%s", string(res))
|
||||
}
|
||||
}
|
||||
|
||||
func TestMergeComplexRemoveAll(t *testing.T) {
|
||||
doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
|
||||
exp := `{"a":null,"f":null,"hello":null,"i":null,"n":null,"nested":null,"pi":null,"t":null}`
|
||||
empty := `{}`
|
||||
res, err := CreateMergePatch([]byte(doc), []byte(empty))
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unexpected error: %s, %s", err, string(res))
|
||||
}
|
||||
|
||||
if exp != string(res) {
|
||||
t.Fatalf("Did not get result, was:%s", string(res))
|
||||
}
|
||||
|
||||
// FIXME: Crashes if using compareJSON like this:
|
||||
/*
|
||||
if !compareJSON(doc, string(res)) {
|
||||
t.Fatalf("Did not get everything as, it was:\n%s", string(res))
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
|
@ -0,0 +1,496 @@
|
|||
package jsonpatch
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
const (
|
||||
eRaw = iota
|
||||
eDoc
|
||||
eAry
|
||||
)
|
||||
|
||||
type lazyNode struct {
|
||||
raw *json.RawMessage
|
||||
doc partialDoc
|
||||
ary partialArray
|
||||
which int
|
||||
}
|
||||
|
||||
type operation map[string]*json.RawMessage
|
||||
|
||||
// Patch is an ordered collection of operations.
|
||||
type Patch []operation
|
||||
|
||||
type partialDoc map[string]*lazyNode
|
||||
type partialArray []*lazyNode
|
||||
|
||||
type container interface {
|
||||
get(key string) (*lazyNode, error)
|
||||
set(key string, val *lazyNode) error
|
||||
remove(key string) error
|
||||
}
|
||||
|
||||
func newLazyNode(raw *json.RawMessage) *lazyNode {
|
||||
return &lazyNode{raw: raw, doc: nil, ary: nil, which: eRaw}
|
||||
}
|
||||
|
||||
func (n *lazyNode) MarshalJSON() ([]byte, error) {
|
||||
switch n.which {
|
||||
case eRaw:
|
||||
return *n.raw, nil
|
||||
case eDoc:
|
||||
return json.Marshal(n.doc)
|
||||
case eAry:
|
||||
return json.Marshal(n.ary)
|
||||
default:
|
||||
return nil, fmt.Errorf("Unknown type")
|
||||
}
|
||||
}
|
||||
|
||||
func (n *lazyNode) UnmarshalJSON(data []byte) error {
|
||||
dest := make(json.RawMessage, len(data))
|
||||
copy(dest, data)
|
||||
n.raw = &dest
|
||||
n.which = eRaw
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *lazyNode) intoDoc() (*partialDoc, error) {
|
||||
if n.which == eDoc {
|
||||
return &n.doc, nil
|
||||
}
|
||||
|
||||
err := json.Unmarshal(*n.raw, &n.doc)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
n.which = eDoc
|
||||
return &n.doc, nil
|
||||
}
|
||||
|
||||
func (n *lazyNode) intoAry() (*partialArray, error) {
|
||||
if n.which == eAry {
|
||||
return &n.ary, nil
|
||||
}
|
||||
|
||||
err := json.Unmarshal(*n.raw, &n.ary)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
n.which = eAry
|
||||
return &n.ary, nil
|
||||
}
|
||||
|
||||
func (n *lazyNode) compact() []byte {
|
||||
buf := &bytes.Buffer{}
|
||||
|
||||
err := json.Compact(buf, *n.raw)
|
||||
|
||||
if err != nil {
|
||||
return *n.raw
|
||||
}
|
||||
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
func (n *lazyNode) tryDoc() bool {
|
||||
err := json.Unmarshal(*n.raw, &n.doc)
|
||||
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
n.which = eDoc
|
||||
return true
|
||||
}
|
||||
|
||||
func (n *lazyNode) tryAry() bool {
|
||||
err := json.Unmarshal(*n.raw, &n.ary)
|
||||
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
n.which = eAry
|
||||
return true
|
||||
}
|
||||
|
||||
func (n *lazyNode) equal(o *lazyNode) bool {
|
||||
if n.which == eRaw {
|
||||
if !n.tryDoc() && !n.tryAry() {
|
||||
if o.which != eRaw {
|
||||
return false
|
||||
}
|
||||
|
||||
return bytes.Equal(n.compact(), o.compact())
|
||||
}
|
||||
}
|
||||
|
||||
if n.which == eDoc {
|
||||
if o.which == eRaw {
|
||||
if !o.tryDoc() {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
if o.which != eDoc {
|
||||
return false
|
||||
}
|
||||
|
||||
for k, v := range n.doc {
|
||||
ov, ok := o.doc[k]
|
||||
|
||||
if !ok {
|
||||
return false
|
||||
}
|
||||
|
||||
if v == nil && ov == nil {
|
||||
continue
|
||||
}
|
||||
|
||||
if !v.equal(ov) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
if o.which != eAry && !o.tryAry() {
|
||||
return false
|
||||
}
|
||||
|
||||
if len(n.ary) != len(o.ary) {
|
||||
return false
|
||||
}
|
||||
|
||||
for idx, val := range n.ary {
|
||||
if !val.equal(o.ary[idx]) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
func (o operation) kind() string {
|
||||
if obj, ok := o["op"]; ok {
|
||||
var op string
|
||||
|
||||
err := json.Unmarshal(*obj, &op)
|
||||
|
||||
if err != nil {
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
return op
|
||||
}
|
||||
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
func (o operation) path() string {
|
||||
if obj, ok := o["path"]; ok {
|
||||
var op string
|
||||
|
||||
err := json.Unmarshal(*obj, &op)
|
||||
|
||||
if err != nil {
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
return op
|
||||
}
|
||||
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
func (o operation) from() string {
|
||||
if obj, ok := o["from"]; ok {
|
||||
var op string
|
||||
|
||||
err := json.Unmarshal(*obj, &op)
|
||||
|
||||
if err != nil {
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
return op
|
||||
}
|
||||
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
func (o operation) value() *lazyNode {
|
||||
if obj, ok := o["value"]; ok {
|
||||
return newLazyNode(obj)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func isArray(buf []byte) bool {
|
||||
Loop:
|
||||
for _, c := range buf {
|
||||
switch c {
|
||||
case ' ':
|
||||
case '\n':
|
||||
case '\t':
|
||||
continue
|
||||
case '[':
|
||||
return true
|
||||
default:
|
||||
break Loop
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func findObject(pd *partialDoc, path string) (container, string) {
|
||||
doc := container(pd)
|
||||
|
||||
split := strings.Split(path, "/")
|
||||
|
||||
parts := split[1 : len(split)-1]
|
||||
|
||||
key := split[len(split)-1]
|
||||
|
||||
var err error
|
||||
|
||||
for _, part := range parts {
|
||||
|
||||
next, ok := doc.get(part)
|
||||
|
||||
if next == nil || ok != nil {
|
||||
return nil, ""
|
||||
}
|
||||
|
||||
if isArray(*next.raw) {
|
||||
doc, err = next.intoAry()
|
||||
|
||||
if err != nil {
|
||||
return nil, ""
|
||||
}
|
||||
} else {
|
||||
doc, err = next.intoDoc()
|
||||
|
||||
if err != nil {
|
||||
return nil, ""
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return doc, key
|
||||
}
|
||||
|
||||
func (d *partialDoc) set(key string, val *lazyNode) error {
|
||||
(*d)[key] = val
|
||||
return nil
|
||||
}
|
||||
|
||||
func (d *partialDoc) get(key string) (*lazyNode, error) {
|
||||
return (*d)[key], nil
|
||||
}
|
||||
|
||||
func (d *partialDoc) remove(key string) error {
|
||||
delete(*d, key)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (d *partialArray) set(key string, val *lazyNode) error {
|
||||
if key == "-" {
|
||||
*d = append(*d, val)
|
||||
return nil
|
||||
}
|
||||
|
||||
idx, err := strconv.Atoi(key)
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ary := make([]*lazyNode, len(*d)+1)
|
||||
|
||||
cur := *d
|
||||
|
||||
copy(ary[0:idx], cur[0:idx])
|
||||
ary[idx] = val
|
||||
copy(ary[idx+1:], cur[idx:])
|
||||
|
||||
*d = ary
|
||||
return nil
|
||||
}
|
||||
|
||||
func (d *partialArray) get(key string) (*lazyNode, error) {
|
||||
idx, err := strconv.Atoi(key)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return (*d)[idx], nil
|
||||
}
|
||||
|
||||
func (d *partialArray) remove(key string) error {
|
||||
idx, err := strconv.Atoi(key)
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
cur := *d
|
||||
|
||||
ary := make([]*lazyNode, len(cur)-1)
|
||||
|
||||
copy(ary[0:idx], cur[0:idx])
|
||||
copy(ary[idx:], cur[idx+1:])
|
||||
|
||||
*d = ary
|
||||
return nil
|
||||
|
||||
}
|
||||
|
||||
func (p Patch) add(doc *partialDoc, op operation) error {
|
||||
path := op.path()
|
||||
|
||||
con, key := findObject(doc, path)
|
||||
|
||||
if con == nil {
|
||||
return fmt.Errorf("Missing container: %s", path)
|
||||
}
|
||||
|
||||
con.set(key, op.value())
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p Patch) remove(doc *partialDoc, op operation) error {
|
||||
path := op.path()
|
||||
|
||||
con, key := findObject(doc, path)
|
||||
|
||||
return con.remove(key)
|
||||
}
|
||||
|
||||
func (p Patch) replace(doc *partialDoc, op operation) error {
|
||||
path := op.path()
|
||||
|
||||
con, key := findObject(doc, path)
|
||||
|
||||
con.set(key, op.value())
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p Patch) move(doc *partialDoc, op operation) error {
|
||||
from := op.from()
|
||||
|
||||
con, key := findObject(doc, from)
|
||||
|
||||
val, err := con.get(key)
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
con.remove(key)
|
||||
|
||||
path := op.path()
|
||||
|
||||
con, key = findObject(doc, path)
|
||||
|
||||
con.set(key, val)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p Patch) test(doc *partialDoc, op operation) error {
|
||||
path := op.path()
|
||||
|
||||
con, key := findObject(doc, path)
|
||||
|
||||
val, err := con.get(key)
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if val.equal(op.value()) {
|
||||
return nil
|
||||
}
|
||||
|
||||
return fmt.Errorf("Testing value %s failed", path)
|
||||
}
|
||||
|
||||
// Equal indicates if 2 JSON documents have the same structural equality.
|
||||
func Equal(a, b []byte) bool {
|
||||
ra := make(json.RawMessage, len(a))
|
||||
copy(ra, a)
|
||||
la := newLazyNode(&ra)
|
||||
|
||||
rb := make(json.RawMessage, len(b))
|
||||
copy(rb, b)
|
||||
lb := newLazyNode(&rb)
|
||||
|
||||
return la.equal(lb)
|
||||
}
|
||||
|
||||
// DecodePatch decodes the passed JSON document as an RFC 6902 patch.
|
||||
func DecodePatch(buf []byte) (Patch, error) {
|
||||
var p Patch
|
||||
|
||||
err := json.Unmarshal(buf, &p)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return p, nil
|
||||
}
|
||||
|
||||
// Apply mutates a JSON document according to the patch, and returns the new
|
||||
// document.
|
||||
func (p Patch) Apply(doc []byte) ([]byte, error) {
|
||||
pd := &partialDoc{}
|
||||
|
||||
err := json.Unmarshal(doc, pd)
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
err = nil
|
||||
|
||||
for _, op := range p {
|
||||
switch op.kind() {
|
||||
case "add":
|
||||
err = p.add(pd, op)
|
||||
case "remove":
|
||||
err = p.remove(pd, op)
|
||||
case "replace":
|
||||
err = p.replace(pd, op)
|
||||
case "move":
|
||||
err = p.move(pd, op)
|
||||
case "test":
|
||||
err = p.test(pd, op)
|
||||
default:
|
||||
err = fmt.Errorf("Unexpected kind: %s", op.kind())
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
return json.Marshal(pd)
|
||||
}
|
||||
234
Godeps/_workspace/src/github.com/evanphx/json-patch/patch_test.go
generated
vendored
Normal file
234
Godeps/_workspace/src/github.com/evanphx/json-patch/patch_test.go
generated
vendored
Normal file
|
|
@ -0,0 +1,234 @@
|
|||
package jsonpatch
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func reformatJSON(j string) string {
|
||||
buf := new(bytes.Buffer)
|
||||
|
||||
json.Indent(buf, []byte(j), "", " ")
|
||||
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
func compareJSON(a, b string) bool {
|
||||
// return Equal([]byte(a), []byte(b))
|
||||
|
||||
var obj_a, obj_b map[string]interface{}
|
||||
json.Unmarshal([]byte(a), &obj_a)
|
||||
json.Unmarshal([]byte(b), &obj_b)
|
||||
|
||||
// fmt.Printf("Comparing %#v\nagainst %#v\n", obj_a, obj_b)
|
||||
return reflect.DeepEqual(obj_a, obj_b)
|
||||
}
|
||||
|
||||
func applyPatch(doc, patch string) (string, error) {
|
||||
obj, err := DecodePatch([]byte(patch))
|
||||
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
out, err := obj.Apply([]byte(doc))
|
||||
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return string(out), nil
|
||||
}
|
||||
|
||||
type Case struct {
|
||||
doc, patch, result string
|
||||
}
|
||||
|
||||
var Cases = []Case{
|
||||
{
|
||||
`{ "foo": "bar"}`,
|
||||
`[
|
||||
{ "op": "add", "path": "/baz", "value": "qux" }
|
||||
]`,
|
||||
`{
|
||||
"baz": "qux",
|
||||
"foo": "bar"
|
||||
}`,
|
||||
},
|
||||
{
|
||||
`{ "foo": [ "bar", "baz" ] }`,
|
||||
`[
|
||||
{ "op": "add", "path": "/foo/1", "value": "qux" }
|
||||
]`,
|
||||
`{ "foo": [ "bar", "qux", "baz" ] }`,
|
||||
},
|
||||
{
|
||||
`{ "baz": "qux", "foo": "bar" }`,
|
||||
`[ { "op": "remove", "path": "/baz" } ]`,
|
||||
`{ "foo": "bar" }`,
|
||||
},
|
||||
{
|
||||
`{ "foo": [ "bar", "qux", "baz" ] }`,
|
||||
`[ { "op": "remove", "path": "/foo/1" } ]`,
|
||||
`{ "foo": [ "bar", "baz" ] }`,
|
||||
},
|
||||
{
|
||||
`{ "baz": "qux", "foo": "bar" }`,
|
||||
`[ { "op": "replace", "path": "/baz", "value": "boo" } ]`,
|
||||
`{ "baz": "boo", "foo": "bar" }`,
|
||||
},
|
||||
{
|
||||
`{
|
||||
"foo": {
|
||||
"bar": "baz",
|
||||
"waldo": "fred"
|
||||
},
|
||||
"qux": {
|
||||
"corge": "grault"
|
||||
}
|
||||
}`,
|
||||
`[ { "op": "move", "from": "/foo/waldo", "path": "/qux/thud" } ]`,
|
||||
`{
|
||||
"foo": {
|
||||
"bar": "baz"
|
||||
},
|
||||
"qux": {
|
||||
"corge": "grault",
|
||||
"thud": "fred"
|
||||
}
|
||||
}`,
|
||||
},
|
||||
{
|
||||
`{ "foo": [ "all", "grass", "cows", "eat" ] }`,
|
||||
`[ { "op": "move", "from": "/foo/1", "path": "/foo/3" } ]`,
|
||||
`{ "foo": [ "all", "cows", "eat", "grass" ] }`,
|
||||
},
|
||||
{
|
||||
`{ "foo": "bar" }`,
|
||||
`[ { "op": "add", "path": "/child", "value": { "grandchild": { } } } ]`,
|
||||
`{ "foo": "bar", "child": { "grandchild": { } } }`,
|
||||
},
|
||||
{
|
||||
`{ "foo": ["bar"] }`,
|
||||
`[ { "op": "add", "path": "/foo/-", "value": ["abc", "def"] } ]`,
|
||||
`{ "foo": ["bar", ["abc", "def"]] }`,
|
||||
},
|
||||
{
|
||||
`{ "foo": "bar", "qux": { "baz": 1, "bar": null } }`,
|
||||
`[ { "op": "remove", "path": "/qux/bar" } ]`,
|
||||
`{ "foo": "bar", "qux": { "baz": 1 } }`,
|
||||
},
|
||||
}
|
||||
|
||||
type BadCase struct {
|
||||
doc, patch string
|
||||
}
|
||||
|
||||
var MutationTestCases = []BadCase{
|
||||
{
|
||||
`{ "foo": "bar", "qux": { "baz": 1, "bar": null } }`,
|
||||
`[ { "op": "remove", "path": "/qux/bar" } ]`,
|
||||
},
|
||||
}
|
||||
|
||||
var BadCases = []BadCase{
|
||||
{
|
||||
`{ "foo": "bar" }`,
|
||||
`[ { "op": "add", "path": "/baz/bat", "value": "qux" } ]`,
|
||||
},
|
||||
}
|
||||
|
||||
func TestAllCases(t *testing.T) {
|
||||
for _, c := range Cases {
|
||||
out, err := applyPatch(c.doc, c.patch)
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unable to apply patch: %s", err)
|
||||
}
|
||||
|
||||
if !compareJSON(out, c.result) {
|
||||
t.Errorf("Patch did not apply. Expected:\n%s\n\nActual:\n%s",
|
||||
reformatJSON(c.result), reformatJSON(out))
|
||||
}
|
||||
}
|
||||
|
||||
for _, c := range MutationTestCases {
|
||||
out, err := applyPatch(c.doc, c.patch)
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Unable to apply patch: %s", err)
|
||||
}
|
||||
|
||||
if compareJSON(out, c.doc) {
|
||||
t.Errorf("Patch did not apply. Original:\n%s\n\nPatched:\n%s",
|
||||
reformatJSON(c.doc), reformatJSON(out))
|
||||
}
|
||||
}
|
||||
|
||||
for _, c := range BadCases {
|
||||
_, err := applyPatch(c.doc, c.patch)
|
||||
|
||||
if err == nil {
|
||||
t.Errorf("Patch should have failed to apply but it did not")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
type TestCase struct {
|
||||
doc, patch string
|
||||
result bool
|
||||
failedPath string
|
||||
}
|
||||
|
||||
var TestCases = []TestCase{
|
||||
{
|
||||
`{
|
||||
"baz": "qux",
|
||||
"foo": [ "a", 2, "c" ]
|
||||
}`,
|
||||
`[
|
||||
{ "op": "test", "path": "/baz", "value": "qux" },
|
||||
{ "op": "test", "path": "/foo/1", "value": 2 }
|
||||
]`,
|
||||
true,
|
||||
"",
|
||||
},
|
||||
{
|
||||
`{ "baz": "qux" }`,
|
||||
`[ { "op": "test", "path": "/baz", "value": "bar" } ]`,
|
||||
false,
|
||||
"/baz",
|
||||
},
|
||||
{
|
||||
`{
|
||||
"baz": "qux",
|
||||
"foo": ["a", 2, "c"]
|
||||
}`,
|
||||
`[
|
||||
{ "op": "test", "path": "/baz", "value": "qux" },
|
||||
{ "op": "test", "path": "/foo/1", "value": "c" }
|
||||
]`,
|
||||
false,
|
||||
"/foo/1",
|
||||
},
|
||||
}
|
||||
|
||||
func TestAllTest(t *testing.T) {
|
||||
for _, c := range TestCases {
|
||||
_, err := applyPatch(c.doc, c.patch)
|
||||
|
||||
if c.result && err != nil {
|
||||
t.Errorf("Testing failed when it should have passed: %s", err)
|
||||
} else if !c.result && err == nil {
|
||||
t.Errorf("Testing passed when it should have faild: %s", err)
|
||||
} else if !c.result {
|
||||
expected := fmt.Sprintf("Testing value %s failed", c.failedPath)
|
||||
if err.Error() != expected {
|
||||
t.Errorf("Testing failed as expected but invalid message: expected [%s], got [%s]", expected, err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue