Added XML object to what-changed.

Picking off low hanging fruit, before attacking the big, ugly stuff.

Signed-off-by: Dave Shanley <dave@quobix.com>

what-changed/xml_test.go

@@ -0,0 +1,143 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package what_changed
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/datamodel/low/base"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestCompareXML_NameChanged(t *testing.T) {
+
+	left := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true`
+
+	right := `namespace: something
+prefix: another
+name: changed xml thing
+attribute: true
+wrapped: true`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// create low level objects
+	var lDoc base.XML
+	var rDoc base.XML
+	_ = low.BuildModel(&lNode, &lDoc)
+	_ = low.BuildModel(&rNode, &rDoc)
+	_ = lDoc.Build(lNode.Content[0], nil)
+	_ = rDoc.Build(rNode.Content[0], nil)
+
+	// compare.
+	extChanges := CompareXML(&lDoc, &rDoc)
+	assert.Equal(t, 1, extChanges.TotalChanges())
+	assert.Equal(t, Modified, extChanges.Changes[0].ChangeType)
+
+}
+
+func TestCompareXML_NameRemoved(t *testing.T) {
+
+	left := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true`
+
+	right := `wrapped: true
+prefix: another
+attribute: true
+namespace: something`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// create low level objects
+	var lDoc base.XML
+	var rDoc base.XML
+	_ = low.BuildModel(&lNode, &lDoc)
+	_ = low.BuildModel(&rNode, &rDoc)
+	_ = lDoc.Build(lNode.Content[0], nil)
+	_ = rDoc.Build(rNode.Content[0], nil)
+
+	// compare.
+	extChanges := CompareXML(&lDoc, &rDoc)
+	assert.Equal(t, 1, extChanges.TotalChanges())
+	assert.Equal(t, PropertyRemoved, extChanges.Changes[0].ChangeType)
+
+}
+
+func TestCompareXML_ExtensionAdded(t *testing.T) {
+
+	left := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true`
+
+	right := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true
+x-coffee: time`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// create low level objects
+	var lDoc base.XML
+	var rDoc base.XML
+	_ = low.BuildModel(&lNode, &lDoc)
+	_ = low.BuildModel(&rNode, &rDoc)
+	_ = lDoc.Build(lNode.Content[0], nil)
+	_ = rDoc.Build(rNode.Content[0], nil)
+
+	// compare.
+	extChanges := CompareXML(&lDoc, &rDoc)
+	assert.Equal(t, 1, extChanges.TotalChanges())
+	assert.Equal(t, ObjectAdded, extChanges.ExtensionChanges.Changes[0].ChangeType)
+
+}
+
+func TestCompareXML_Identical(t *testing.T) {
+
+	left := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true`
+
+	right := `name: xml thing
+namespace: something
+prefix: another
+attribute: true
+wrapped: true`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// create low level objects
+	var lDoc base.XML
+	var rDoc base.XML
+	_ = low.BuildModel(&lNode, &lDoc)
+	_ = low.BuildModel(&rNode, &rDoc)
+	_ = lDoc.Build(lNode.Content[0], nil)
+	_ = rDoc.Build(rNode.Content[0], nil)
+
+	// compare.
+	extChanges := CompareXML(&lDoc, &rDoc)
+	assert.Nil(t, extChanges)
+
+}