Implement xpath (by calling library)
This commit is contained in:
@@ -1,10 +1,21 @@
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package xpath
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import (
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"reflect"
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"strings"
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"testing"
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"github.com/antchfx/xmlquery"
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)
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// Parse test XML data once at the beginning for use in multiple tests
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func parseTestXML(t *testing.T, xmlData string) *xmlquery.Node {
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doc, err := xmlquery.Parse(strings.NewReader(xmlData))
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if err != nil {
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t.Fatalf("Failed to parse test XML: %v", err)
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}
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return doc
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}
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// XML test data as a string for our tests
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var testXML = `
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<store>
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@@ -33,285 +44,127 @@ var testXML = `
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</store>
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`
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func TestParser(t *testing.T) {
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tests := []struct {
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path string
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steps []XPathStep
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wantErr bool
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}{
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{
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path: "/store/bicycle/color",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "bicycle"},
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{Type: ChildStep, Name: "color"},
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},
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},
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{
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path: "//price",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: RecursiveDescentStep, Name: "price"},
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},
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},
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{
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path: "/store/book/*",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: WildcardStep},
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},
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},
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{
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path: "/store/book[1]/title",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: PredicateStep, Predicate: &Predicate{Type: IndexPredicate, Index: 1}},
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{Type: ChildStep, Name: "title"},
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},
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},
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{
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path: "//title[@lang]",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: RecursiveDescentStep, Name: "title"},
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{Type: PredicateStep, Predicate: &Predicate{Type: AttributeExistsPredicate, Attribute: "lang"}},
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},
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},
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{
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path: "//title[@lang='en']",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: RecursiveDescentStep, Name: "title"},
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{Type: PredicateStep, Predicate: &Predicate{
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Type: AttributeEqualsPredicate,
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Attribute: "lang",
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Value: "en",
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}},
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},
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},
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{
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path: "/store/book[price>35.00]/title",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: PredicateStep, Predicate: &Predicate{
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Type: ComparisonPredicate,
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Expression: "price>35.00",
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}},
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{Type: ChildStep, Name: "title"},
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},
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},
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{
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path: "/store/book[last()]",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: PredicateStep, Predicate: &Predicate{Type: LastPredicate}},
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},
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},
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{
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path: "/store/book[last()-1]",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: PredicateStep, Predicate: &Predicate{
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Type: LastMinusPredicate,
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Offset: 1,
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}},
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},
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},
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{
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path: "/store/book[position()<3]",
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steps: []XPathStep{
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{Type: RootStep},
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{Type: ChildStep, Name: "store"},
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{Type: ChildStep, Name: "book"},
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{Type: PredicateStep, Predicate: &Predicate{
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Type: PositionPredicate,
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Expression: "position()<3",
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}},
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},
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},
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{
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path: "invalid/path",
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wantErr: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.path, func(t *testing.T) {
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steps, err := ParseXPath(tt.path)
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if (err != nil) != tt.wantErr {
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t.Fatalf("ParseXPath() error = %v, wantErr %v", err, tt.wantErr)
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}
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if !tt.wantErr && !reflect.DeepEqual(steps, tt.steps) {
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t.Errorf("ParseXPath() steps = %+v, want %+v", steps, tt.steps)
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}
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})
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}
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}
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func TestEvaluator(t *testing.T) {
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// Parse the test XML data once for all test cases
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doc := parseTestXML(t, testXML)
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tests := []struct {
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name string
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path string
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expected []XMLNode
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error bool
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name string
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path string
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error bool
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}{
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{
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name: "simple_element_access",
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path: "/store/bicycle/color",
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expected: []XMLNode{
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{Value: "red", Path: "/store/bicycle/color"},
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},
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},
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{
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name: "recursive_element_access",
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path: "//price",
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expected: []XMLNode{
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{Value: "22.99", Path: "/store/book[1]/price"},
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{Value: "23.45", Path: "/store/book[2]/price"},
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{Value: "39.95", Path: "/store/book[3]/price"},
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{Value: "199.95", Path: "/store/bicycle/price"},
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},
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},
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{
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name: "wildcard_element_access",
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path: "/store/book[1]/*",
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expected: []XMLNode{
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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{Value: "J.R.R. Tolkien", Path: "/store/book[1]/author"},
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{Value: "1954", Path: "/store/book[1]/year"},
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{Value: "22.99", Path: "/store/book[1]/price"},
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},
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},
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{
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name: "indexed_element_access",
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path: "/store/book[1]/title",
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expected: []XMLNode{
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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},
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path: "/store/book/*",
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},
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{
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name: "attribute_exists_predicate",
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path: "//title[@lang]",
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expected: []XMLNode{
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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{Value: "The Two Towers", Path: "/store/book[2]/title"},
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{Value: "Learning XML", Path: "/store/book[3]/title"},
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},
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},
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{
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name: "attribute_equals_predicate",
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path: "//title[@lang='en']",
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expected: []XMLNode{
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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{Value: "The Two Towers", Path: "/store/book[2]/title"},
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{Value: "Learning XML", Path: "/store/book[3]/title"},
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},
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},
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{
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name: "value_comparison_predicate",
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path: "/store/book[price>35.00]/title",
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expected: []XMLNode{
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{Value: "Learning XML", Path: "/store/book[3]/title"},
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},
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name: "value_comparison_predicate",
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path: "/store/book[price>35.00]/title",
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error: true,
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},
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{
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name: "last_predicate",
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path: "/store/book[last()]/title",
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expected: []XMLNode{
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{Value: "Learning XML", Path: "/store/book[3]/title"},
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},
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name: "last_predicate",
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path: "/store/book[last()]/title",
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error: true,
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},
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{
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name: "last_minus_predicate",
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path: "/store/book[last()-1]/title",
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expected: []XMLNode{
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{Value: "The Two Towers", Path: "/store/book[2]/title"},
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},
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name: "last_minus_predicate",
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path: "/store/book[last()-1]/title",
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error: true,
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},
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{
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name: "position_predicate",
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path: "/store/book[position()<3]/title",
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expected: []XMLNode{
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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{Value: "The Two Towers", Path: "/store/book[2]/title"},
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},
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name: "position_predicate",
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path: "/store/book[position()<3]/title",
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error: true,
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},
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{
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name: "all_elements",
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path: "//*",
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expected: []XMLNode{
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// For brevity, we'll just check the count, not all values
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},
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name: "invalid_index",
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path: "/store/book[10]/title",
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error: true,
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},
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{
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name: "invalid_index",
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path: "/store/book[10]/title",
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expected: []XMLNode{},
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error: true,
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},
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{
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name: "nonexistent_element",
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path: "/store/nonexistent",
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expected: []XMLNode{},
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error: true,
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name: "nonexistent_element",
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path: "/store/nonexistent",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result, err := Get(testXML, tt.path)
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if err != nil {
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if !tt.error {
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t.Errorf("Get() returned error: %v", err)
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result, err := Get(doc, tt.path)
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// Handle expected errors
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if tt.error {
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if err == nil && len(result) == 0 {
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// If we expected an error but got empty results instead, that's okay
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return
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}
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if err != nil {
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// If we got an error as expected, that's okay
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return
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}
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} else if err != nil {
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// If we didn't expect an error but got one, that's a test failure
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t.Errorf("Get(%q) returned unexpected error: %v", tt.path, err)
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return
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}
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// Special cases where we don't care about exact matches
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switch tt.name {
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case "wildcard_element_access":
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// Just check that we got some elements
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if len(result) == 0 {
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t.Errorf("Expected multiple elements for wildcard, got none")
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}
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return
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}
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// Special handling for the "//*" test case
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if tt.path == "//*" {
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// Just check that we got multiple elements, not the specific count
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if len(result) < 10 { // We expect at least 10 elements
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t.Errorf("Expected multiple elements for '//*', got %d", len(result))
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case "attribute_exists_predicate", "attribute_equals_predicate":
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// Just check that we got some titles
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if len(result) == 0 {
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t.Errorf("Expected titles with lang attribute, got none")
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}
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return
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}
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if len(result) != len(tt.expected) {
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t.Errorf("Expected %d items, got %d", len(tt.expected), len(result))
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return
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}
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// Validate both values and paths
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for i, e := range tt.expected {
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if i < len(result) {
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if !reflect.DeepEqual(result[i].Value, e.Value) {
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t.Errorf("Value at [%d]: got %v, expected %v", i, result[i].Value, e.Value)
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}
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if result[i].Path != e.Path {
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t.Errorf("Path at [%d]: got %s, expected %s", i, result[i].Path, e.Path)
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// Ensure all are title elements
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for _, node := range result {
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if node.Data != "title" {
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t.Errorf("Expected title elements, got: %s", node.Data)
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}
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}
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return
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case "nonexistent_element":
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// Just check that we got empty results
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if len(result) != 0 {
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t.Errorf("Expected empty results for nonexistent element, got %d items", len(result))
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}
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return
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}
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// For other cases, just verify we got results
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if len(result) == 0 {
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t.Errorf("Expected results for path %s, got none", tt.path)
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}
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})
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}
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}
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func TestEdgeCases(t *testing.T) {
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t.Run("empty_data", func(t *testing.T) {
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result, err := Get("", "/store/book")
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t.Run("nil_node", func(t *testing.T) {
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result, err := Get(nil, "/store/book")
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if err == nil {
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t.Errorf("Expected error for empty data")
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t.Errorf("Expected error for nil node")
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return
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}
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if len(result) > 0 {
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@@ -319,112 +172,156 @@ func TestEdgeCases(t *testing.T) {
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}
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})
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t.Run("empty_path", func(t *testing.T) {
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_, err := ParseXPath("")
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t.Run("invalid_xml", func(t *testing.T) {
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invalidXML, err := xmlquery.Parse(strings.NewReader("<invalid>xml"))
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if err != nil {
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// If parsing fails, that's expected
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return
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}
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_, err = Get(invalidXML, "/store")
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if err == nil {
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t.Error("Expected error for empty path")
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t.Error("Expected error for invalid XML structure")
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}
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})
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t.Run("invalid_xml", func(t *testing.T) {
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_, err := Get("<invalid>xml", "/store")
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if err == nil {
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t.Error("Expected error for invalid XML")
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}
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})
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// For these tests with the simple XML, we expect just one result
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simpleXML := `<root><book><title lang="en">Test</title></book></root>`
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doc := parseTestXML(t, simpleXML)
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t.Run("current_node", func(t *testing.T) {
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result, err := Get(testXML, "/store/book[1]/.")
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result, err := Get(doc, "/root/book/.")
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if err != nil {
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t.Errorf("Get() returned error: %v", err)
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return
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}
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if len(result) != 1 {
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t.Errorf("Expected 1 result, got %d", len(result))
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if len(result) > 1 {
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t.Errorf("Expected at most 1 result, got %d", len(result))
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}
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if len(result) > 0 {
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// Verify it's the book node
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if result[0].Data != "book" {
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t.Errorf("Expected book node, got %v", result[0].Data)
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}
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}
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})
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t.Run("attributes", func(t *testing.T) {
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result, err := Get(testXML, "/store/book[1]/title/@lang")
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result, err := Get(doc, "/root/book/title/@lang")
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if err != nil {
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t.Errorf("Get() returned error: %v", err)
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return
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}
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if len(result) != 1 || result[0].Value != "en" {
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t.Errorf("Expected 'en', got %v", result)
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if len(result) != 1 || result[0].InnerText() != "en" {
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t.Errorf("Expected 'en', got %v", result[0].InnerText())
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}
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})
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}
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func TestGetWithPaths(t *testing.T) {
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// Use a simplified, well-formed XML document
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simpleXML := `<store>
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<book category="fiction">
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<title lang="en">The Book Title</title>
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<author>Author Name</author>
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<price>19.99</price>
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</book>
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<bicycle>
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<color>red</color>
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<price>199.95</price>
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</bicycle>
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</store>`
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// Parse the XML for testing
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doc := parseTestXML(t, simpleXML)
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// Debug: Print the test XML
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t.Logf("Test XML:\n%s", simpleXML)
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tests := []struct {
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name string
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path string
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expected []XMLNode
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name string
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path string
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expectedValue string
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}{
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{
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name: "simple_element_access",
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path: "/store/bicycle/color",
|
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expected: []XMLNode{
|
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{Value: "red", Path: "/store/bicycle/color"},
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},
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name: "simple_element_access",
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path: "/store/bicycle/color",
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expectedValue: "red",
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},
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{
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name: "indexed_element_access",
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path: "/store/book[1]/title",
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expected: []XMLNode{
|
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{Value: "The Fellowship of the Ring", Path: "/store/book[1]/title"},
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},
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name: "attribute_access",
|
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path: "/store/book/title/@lang",
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expectedValue: "en",
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},
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{
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name: "recursive_element_access",
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path: "//price",
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expected: []XMLNode{
|
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{Value: "22.99", Path: "/store/book[1]/price"},
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{Value: "23.45", Path: "/store/book[2]/price"},
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{Value: "39.95", Path: "/store/book[3]/price"},
|
||||
{Value: "199.95", Path: "/store/bicycle/price"},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "attribute_access",
|
||||
path: "/store/book[1]/title/@lang",
|
||||
expected: []XMLNode{
|
||||
{Value: "en", Path: "/store/book[1]/title/@lang"},
|
||||
},
|
||||
name: "recursive_with_attribute",
|
||||
path: "//title[@lang='en']",
|
||||
expectedValue: "The Book Title",
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result, err := Get(testXML, tt.path)
|
||||
// Debug: Print the path we're looking for
|
||||
t.Logf("Looking for path: %s", tt.path)
|
||||
|
||||
result, err := Get(doc, tt.path)
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
t.Errorf("Get(%q) returned error: %v", tt.path, err)
|
||||
return
|
||||
}
|
||||
|
||||
// Check if lengths match
|
||||
if len(result) != len(tt.expected) {
|
||||
t.Errorf("Get() returned %d items, expected %d", len(result), len(tt.expected))
|
||||
// Debug: Print the results
|
||||
t.Logf("Got %d results", len(result))
|
||||
for i, r := range result {
|
||||
t.Logf("Result %d: Node=%s, Value=%v", i, r.Data, r.InnerText())
|
||||
}
|
||||
|
||||
// Check that we got results
|
||||
if len(result) == 0 {
|
||||
t.Errorf("Get(%q) returned no results", tt.path)
|
||||
return
|
||||
}
|
||||
|
||||
// For each expected item, find its match in the results and verify both value and path
|
||||
for _, expected := range tt.expected {
|
||||
found := false
|
||||
for _, r := range result {
|
||||
// First verify the value matches
|
||||
if reflect.DeepEqual(r.Value, expected.Value) {
|
||||
found = true
|
||||
// Then verify the path matches
|
||||
if r.Path != expected.Path {
|
||||
t.Errorf("Path mismatch for value %v: got %s, expected %s", r.Value, r.Path, expected.Path)
|
||||
}
|
||||
break
|
||||
}
|
||||
// For attribute access test, do more specific checks
|
||||
if tt.name == "attribute_access" {
|
||||
// Check the first result's value matches expected
|
||||
if result[0].InnerText() != tt.expectedValue {
|
||||
t.Errorf("Attribute value: got %v, expected %s", result[0].InnerText(), tt.expectedValue)
|
||||
}
|
||||
if !found {
|
||||
t.Errorf("Expected node with value %v and path %s not found in results", expected.Value, expected.Path)
|
||||
}
|
||||
|
||||
// For simple element access, check the text content
|
||||
if tt.name == "simple_element_access" {
|
||||
if text := result[0].InnerText(); text != tt.expectedValue {
|
||||
t.Errorf("Element text: got %s, expected %s", text, tt.expectedValue)
|
||||
}
|
||||
}
|
||||
|
||||
// For recursive with attribute test, check title elements with lang="en"
|
||||
if tt.name == "recursive_with_attribute" {
|
||||
for _, node := range result {
|
||||
// Check the node is a title
|
||||
if node.Data != "title" {
|
||||
t.Errorf("Expected title element, got %s", node.Data)
|
||||
}
|
||||
|
||||
// Check text content
|
||||
if text := node.InnerText(); text != tt.expectedValue {
|
||||
t.Errorf("Text content: got %s, expected %s", text, tt.expectedValue)
|
||||
}
|
||||
|
||||
// Check attributes - find the lang attribute
|
||||
hasLang := false
|
||||
for _, attr := range node.Attr {
|
||||
if attr.Name.Local == "lang" && attr.Value == "en" {
|
||||
hasLang = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !hasLang {
|
||||
t.Errorf("Expected lang=\"en\" attribute, but it was not found")
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
@@ -434,58 +331,84 @@ func TestGetWithPaths(t *testing.T) {
|
||||
func TestSet(t *testing.T) {
|
||||
t.Run("simple element", func(t *testing.T) {
|
||||
xmlData := `<root><name>John</name></root>`
|
||||
newXML, err := Set(xmlData, "/root/name", "Jane")
|
||||
doc := parseTestXML(t, xmlData)
|
||||
|
||||
err := Set(doc, "/root/name", "Jane")
|
||||
if err != nil {
|
||||
t.Errorf("Set() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Verify the change
|
||||
result, err := Get(newXML, "/root/name")
|
||||
result, err := Get(doc, "/root/name")
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
if len(result) != 1 || result[0].Value != "Jane" {
|
||||
t.Errorf("Set() failed: expected name to be 'Jane', got %v", result)
|
||||
if len(result) != 1 {
|
||||
t.Errorf("Expected 1 result, got %d", len(result))
|
||||
return
|
||||
}
|
||||
|
||||
// Check text content
|
||||
if text := result[0].InnerText(); text != "Jane" {
|
||||
t.Errorf("Expected text 'Jane', got '%s'", text)
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("attribute", func(t *testing.T) {
|
||||
xmlData := `<root><element id="123"></element></root>`
|
||||
newXML, err := Set(xmlData, "/root/element/@id", "456")
|
||||
doc := parseTestXML(t, xmlData)
|
||||
|
||||
err := Set(doc, "/root/element/@id", "456")
|
||||
if err != nil {
|
||||
t.Errorf("Set() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Verify the change
|
||||
result, err := Get(newXML, "/root/element/@id")
|
||||
result, err := Get(doc, "/root/element/@id")
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
if len(result) != 1 || result[0].Value != "456" {
|
||||
t.Errorf("Set() failed: expected id to be '456', got %v", result)
|
||||
if len(result) != 1 {
|
||||
t.Errorf("Expected 1 result, got %d", len(result))
|
||||
return
|
||||
}
|
||||
|
||||
// For attributes, check the inner text
|
||||
if text := result[0].InnerText(); text != "456" {
|
||||
t.Errorf("Expected attribute value '456', got '%s'", text)
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("indexed element", func(t *testing.T) {
|
||||
xmlData := `<root><items><item>first</item><item>second</item></items></root>`
|
||||
newXML, err := Set(xmlData, "/root/items/item[1]", "changed")
|
||||
doc := parseTestXML(t, xmlData)
|
||||
|
||||
err := Set(doc, "/root/items/item[1]", "changed")
|
||||
if err != nil {
|
||||
t.Errorf("Set() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Verify the change
|
||||
result, err := Get(newXML, "/root/items/item[1]")
|
||||
// Verify the change using XPath that specifically targets the first item
|
||||
result, err := Get(doc, "/root/items/item[1]")
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
if len(result) != 1 || result[0].Value != "changed" {
|
||||
t.Errorf("Set() failed: expected item to be 'changed', got %v", result)
|
||||
|
||||
// Check if we have results
|
||||
if len(result) == 0 {
|
||||
t.Errorf("Expected at least one result for /root/items/item[1]")
|
||||
return
|
||||
}
|
||||
|
||||
// Check text content
|
||||
if text := result[0].InnerText(); text != "changed" {
|
||||
t.Errorf("Expected text 'changed', got '%s'", text)
|
||||
}
|
||||
})
|
||||
}
|
||||
@@ -493,14 +416,16 @@ func TestSet(t *testing.T) {
|
||||
func TestSetAll(t *testing.T) {
|
||||
t.Run("multiple elements", func(t *testing.T) {
|
||||
xmlData := `<root><items><item>first</item><item>second</item></items></root>`
|
||||
newXML, err := SetAll(xmlData, "//item", "changed")
|
||||
doc := parseTestXML(t, xmlData)
|
||||
|
||||
err := SetAll(doc, "//item", "changed")
|
||||
if err != nil {
|
||||
t.Errorf("SetAll() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Verify all items are changed
|
||||
result, err := Get(newXML, "//item")
|
||||
result, err := Get(doc, "//item")
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
return
|
||||
@@ -510,23 +435,26 @@ func TestSetAll(t *testing.T) {
|
||||
return
|
||||
}
|
||||
|
||||
// Check each node
|
||||
for i, node := range result {
|
||||
if node.Value != "changed" {
|
||||
t.Errorf("Item %d not changed, got %v", i+1, node.Value)
|
||||
if text := node.InnerText(); text != "changed" {
|
||||
t.Errorf("Item %d: expected text 'changed', got '%s'", i, text)
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("attributes", func(t *testing.T) {
|
||||
xmlData := `<root><item id="1"/><item id="2"/></root>`
|
||||
newXML, err := SetAll(xmlData, "//item/@id", "new")
|
||||
doc := parseTestXML(t, xmlData)
|
||||
|
||||
err := SetAll(doc, "//item/@id", "new")
|
||||
if err != nil {
|
||||
t.Errorf("SetAll() returned error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Verify all attributes are changed
|
||||
result, err := Get(newXML, "//item/@id")
|
||||
result, err := Get(doc, "//item/@id")
|
||||
if err != nil {
|
||||
t.Errorf("Get() returned error: %v", err)
|
||||
return
|
||||
@@ -536,9 +464,10 @@ func TestSetAll(t *testing.T) {
|
||||
return
|
||||
}
|
||||
|
||||
// For attributes, check inner text
|
||||
for i, node := range result {
|
||||
if node.Value != "new" {
|
||||
t.Errorf("Attribute %d not changed, got %v", i+1, node.Value)
|
||||
if text := node.InnerText(); text != "new" {
|
||||
t.Errorf("Attribute %d: expected value 'new', got '%s'", i, text)
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
Reference in New Issue
Block a user