Fleshing out what-changed functionality.

Starting at the bottom again with low levels and sketching out how to consume it.

what-changed/extensions_test.go

@@ -0,0 +1,146 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package what_changed
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestCompareExtensions(t *testing.T) {
+
+	left := `x-test: 1`
+	right := `x-test: 2`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Len(t, extChanges.Changes, 1)
+	assert.Equal(t, Modified, extChanges.Changes[0].ChangeType)
+	assert.Equal(t, "1", extChanges.Changes[0].Original)
+	assert.Equal(t, "2", extChanges.Changes[0].New)
+	assert.False(t, extChanges.Changes[0].Context.HasChanged())
+}
+
+func TestCompareExtensions_Moved(t *testing.T) {
+
+	left := `pizza: pie
+x-test: 1`
+
+	right := `x-test: 1`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Len(t, extChanges.Changes, 1)
+	assert.Equal(t, Moved, extChanges.Changes[0].ChangeType)
+	assert.Equal(t, 2, extChanges.Changes[0].Context.OrigLine)
+	assert.Equal(t, 1, extChanges.Changes[0].Context.NewLine)
+	assert.True(t, extChanges.Changes[0].Context.HasChanged())
+}
+
+func TestCompareExtensions_ModifiedAndMoved(t *testing.T) {
+
+	left := `pizza: pie
+x-test: 1`
+
+	right := `x-test: 2`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Len(t, extChanges.Changes, 1)
+	assert.Equal(t, ModifiedAndMoved, extChanges.Changes[0].ChangeType)
+	assert.Equal(t, 2, extChanges.Changes[0].Context.OrigLine)
+	assert.Equal(t, 1, extChanges.Changes[0].Context.NewLine)
+	assert.Equal(t, "1", extChanges.Changes[0].Original)
+	assert.Equal(t, "2", extChanges.Changes[0].New)
+	assert.True(t, extChanges.Changes[0].Context.HasChanged())
+}
+
+func TestCompareExtensions_Removed(t *testing.T) {
+
+	left := `pizza: pie
+x-test: 1`
+
+	right := `pizza: pie`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Len(t, extChanges.Changes, 1)
+	assert.Equal(t, PropertyRemoved, extChanges.Changes[0].ChangeType)
+	assert.Equal(t, 2, extChanges.Changes[0].Context.OrigLine)
+	assert.Equal(t, -1, extChanges.Changes[0].Context.NewLine)
+	assert.Equal(t, "1", extChanges.Changes[0].Original)
+	assert.True(t, extChanges.Changes[0].Context.HasChanged())
+}
+
+func TestCompareExtensions_Added(t *testing.T) {
+
+	left := `pizza: pie`
+
+	right := `pizza: pie
+x-test: 1`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Len(t, extChanges.Changes, 1)
+	assert.Equal(t, PropertyAdded, extChanges.Changes[0].ChangeType)
+	assert.Equal(t, -1, extChanges.Changes[0].Context.OrigLine)
+	assert.Equal(t, 2, extChanges.Changes[0].Context.NewLine)
+	assert.Equal(t, "1", extChanges.Changes[0].New)
+	assert.True(t, extChanges.Changes[0].Context.HasChanged())
+}
+
+func TestCompareExtensions_Identical(t *testing.T) {
+
+	left := `x-test: 1`
+
+	right := `x-test: 1`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	lExt := low.ExtractExtensions(lNode.Content[0])
+	rExt := low.ExtractExtensions(rNode.Content[0])
+
+	extChanges := CompareExtensions(lExt, rExt)
+
+	assert.Nil(t, extChanges)
+}