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writer_test.go
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package xmlwriter
import (
"bytes"
"encoding/xml"
"errors"
"fmt"
"io"
"os"
"strings"
"testing"
)
func ExampleNew_xhtml() {
const (
xhtml NS = "http://www.w3.org/1999/xhtml"
svg NS = "http://www.w3.org/2000/svg"
xlink NS = "http://www.w3.org/1999/xlink"
)
x := New(os.Stdout)
x.Indent(" ")
x.DefaultProcInst()
x.Directive([]byte("DOCTYPE html"))
x.Start(xhtml, "html", xhtml.Bind(""))
{
x.Start(xhtml, "head")
{
x.Start(xhtml, "title")
x.Text(false, "Document Title")
x.End(false)
}
{
x.Start(xhtml, "link")
x.Attr(xhtml, "rel", "stylesheet")
x.Attr(xhtml, "href", "style.css")
x.End(true)
}
{
x.Start(xhtml, "style")
x.Text(true, "svg {")
x.Text(true, " width: 20px;")
x.Text(true, " fill: black;")
x.Text(true, "}")
x.End(false)
}
x.End(false)
}
{
x.Start(xhtml, "body")
{
x.Start(xhtml, "p")
x.Text(false, "This is an example document generated by ")
{
x.Start(xhtml, "i")
x.Text(false, "xmlwriter")
x.End(false)
}
x.Text(false, ".")
x.End(false)
}
x.BlankLine()
{
x.Start(svg, "svg", svg.Bind(""), xlink.Bind("xlink"))
x.Attr(svg, "viewBox", "0 0 20 20")
{
x.Start(svg, "a")
x.Attr(xlink, "href", "https://example.com")
{
x.Start(svg, "circle")
x.Attr(svg, "cx", "10")
x.Attr(svg, "cy", "10")
x.Attr(svg, "r", "8")
x.End(true)
}
x.End(false)
}
x.End(false)
}
x.End(false)
}
x.End(false)
if err := x.Close(); err != nil {
fmt.Fprintf(os.Stderr, "\nError: %v\n", err)
os.Exit(1)
}
// Output:
// <?xml version="1.0" encoding="UTF-8"?>
// <!DOCTYPE html>
// <html xmlns="http://www.w3.org/1999/xhtml">
// <head>
// <title>Document Title</title>
// <link rel="stylesheet" href="style.css"/>
// <style>
// svg {
// width: 20px;
// fill: black;
// }
// </style>
// </head>
// <body>
// <p>This is an example document generated by <i>xmlwriter</i>.</p>
//
// <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 20 20">
// <a xlink:href="https://example.com">
// <circle cx="10" cy="10" r="8"/>
// </a>
// </svg>
// </body>
// </html>
}
func TestWriter(t *testing.T) {
out := func(s string) string {
const (
i = "\t\t\t"
p = "\n" + i + "\t"
)
s = strings.ReplaceAll(s, "\r", "")
if !strings.HasPrefix(s, p) || !strings.HasSuffix(s, i) {
panic("failed to remove indentation")
}
return strings.TrimSuffix(strings.ReplaceAll(strings.TrimPrefix(s, p), p, "\n"), i)
}
for _, tc := range []struct {
Name string
Do func(*XMLWriter)
Out string
NoValidate bool
}{
{
Name: "ProcInstNoIndent",
Do: func(x *XMLWriter) {
x.DefaultProcInst()
},
Out: strings.TrimRight(out(`
<?xml version="1.0" encoding="UTF-8"?>
`), "\n"),
},
{
Name: "ProcInstIndent",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.DefaultProcInst()
},
Out: out(`
<?xml version="1.0" encoding="UTF-8"?>
`),
},
{
Name: "XMLNS",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.DefaultProcInst()
x.Start(nil, "root", BoundNS{})
x.Attr(NamespaceXML, "lang", "en")
x.End(true)
},
Out: out(`
<?xml version="1.0" encoding="UTF-8"?>
<root xml:lang="en"/>
`),
},
{
Name: "NoElementEnd",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
},
},
{
Name: "NoElementStart",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.End(false)
},
},
{
Name: "NoElementForText",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Text(false, "test")
},
},
{
Name: "Raw",
Do: func(x *XMLWriter) {
x.Raw([]byte("><><>>>><<<<<>>>"))
},
Out: "><><>>>><<<<<>>>",
NoValidate: true,
},
{
Name: "RawInElement",
Do: func(x *XMLWriter) {
x.Start(nil, "test", BoundNS{})
x.Raw([]byte("><><>>>><<<<<>>>"))
x.End(false)
},
Out: "<test>><><>>>><<<<<>>></test>",
NoValidate: true,
},
{
Name: "ProcInstInElement",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.ProcInst("sdf", "dfg")
x.End(false)
},
Out: out(`
<test>
<?sdf dfg?>
</test>
`),
},
{
Name: "NoElementForAttr",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Attr(nil, "test", "test")
},
},
{
Name: "SelfClosingElement",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.End(true)
},
Out: out(`
<test/>
`),
},
{
Name: "SelfClosingElementAttr",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Attr(nil, "test", "test")
x.End(true)
},
Out: out(`
<test test="test"/>
`),
},
{
Name: "DuplicateAttr",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Attr(nil, "test", "test")
x.Attr(nil, "test", "test")
x.End(true)
},
},
{
Name: "DuplicateAttrNS",
Do: func(x *XMLWriter) {
ns := NS("https://example.com/ns")
x.Indent("\t")
x.Start(ns, "test", BoundNS{ns, ""}, BoundNS{ns, "test"})
x.Attr(ns, "test", "test")
x.Attr(BoundNS{ns, "test"}, "test", "test")
x.End(true)
},
},
{
Name: "InvalidAttrNSPrefix1",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Attr(Prefix("."), "test", "test")
x.End(true)
},
},
{
Name: "InvalidNSPrefix1",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{"https://example.com/ns1", "."})
x.End(true)
},
},
{
Name: "InvalidNSPrefix2",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{}, BoundNS{"", "test"})
x.End(true)
},
},
{
Name: "InvalidNSPrefix3",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{}, BoundNS{"https://example.com/ns1", "test"}, BoundNS{"https://example.com/ns1", "test"})
x.End(true)
},
},
{
Name: "UnboundAttrNSPrefix1",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Attr(Prefix("test"), "test", "test")
x.End(true)
},
},
{
Name: "UnboundAttrNSPrefix2",
Do: func(x *XMLWriter) {
ns := NS("https://example.com/ns")
x.Indent("\t")
x.Start(ns, "test", BoundNS{ns, ""})
x.Attr(Prefix("test"), "test", "test")
x.End(true)
},
},
{
Name: "UnboundAttrNS",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Attr(NS("https://example.com/ns"), "test", "test")
x.End(true)
},
},
{
Name: "WrongAttrDefaultNS1",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{"https://example.com/ns", ""})
x.Attr(BoundNS{"https://example.com/ns1", ""}, "test", "test")
x.End(true)
},
},
{
Name: "WrongAttrDefaultNS2",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{"https://example.com/ns", ""})
x.Attr(NS("https://example.com/ns1"), "test", "test")
x.End(true)
},
},
{
Name: "WrongAttrPrefixNestedNS",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{"https://example.com/ns1", "ns"})
x.Start(nil, "test", BoundNS{"https://example.com/ns", "ns"})
x.Attr(BoundNS{"https://example.com/ns1", "ns"}, "test", "test")
x.End(true)
x.End(false)
},
},
{
Name: "MultipleAttrNS",
Do: func(x *XMLWriter) {
ns := NS("https://example.com/ns")
ns1 := NS("https://example.com/ns1")
x.Indent("\t")
x.Start(ns, "test", BoundNS{ns, ""}, BoundNS{ns1, "test"})
x.Attr(ns, "test", "test")
x.Attr(BoundNS{ns1, "test"}, "test", "test")
x.End(true)
},
Out: out(`
<test xmlns="https://example.com/ns" xmlns:test="https://example.com/ns1" test="test" test:test="test"/>
`),
},
{
Name: "WrongPrefixNestedNS",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{}, BoundNS{"https://example.com/ns1", "ns"})
x.Start(nil, "test", BoundNS{"https://example.com/ns", ""})
x.Start(BoundNS{"https://example.com/ns", "ns"}, "test")
x.End(true)
x.End(false)
x.End(false)
},
},
{
Name: "Element",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.End(false)
},
Out: out(`
<test></test>
`),
},
{
Name: "EndAuto",
Do: func(x *XMLWriter) {
x.Start(nil, "no", BoundNS{})
x.Start(nil, "yes")
x.EndAuto()
x.Start(nil, "yes")
x.Attr(nil, "test", "test")
x.EndAuto()
x.Start(nil, "no")
x.BlankLine()
x.EndAuto()
x.Start(nil, "no")
x.Text(false, "test")
x.EndAuto()
x.Start(nil, "no")
x.Comment(false, "test")
x.EndAuto()
x.Start(nil, "no")
x.ProcInst("test", "test")
x.EndAuto()
x.Start(nil, "no")
x.Directive([]byte("test"))
x.EndAuto()
x.Start(nil, "no")
x.Text(false, "")
x.EndAuto()
x.Start(nil, "no")
x.Raw([]byte("test"))
x.EndAuto()
x.EndAuto()
},
Out: `<no><yes/><yes test="test"/><no></no><no>test</no><no><!--test--></no><no><?test test?></no><no><!test></no><no></no><no>test</no></no>`,
},
{
Name: "DirectiveInElement",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(nil, "test", BoundNS{})
x.Directive([]byte("test"))
x.End(false)
},
Out: out(`
<test>
<!test>
</test>
`),
},
{
Name: "BlankLine",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.DefaultProcInst()
x.Start(nil, "test", BoundNS{})
x.BlankLine()
x.End(false)
},
Out: out(`
<?xml version="1.0" encoding="UTF-8"?>
<test>
</test>
`),
},
{
Name: "ProcInstElementNoIndent",
Do: func(x *XMLWriter) {
x.DefaultProcInst()
x.Start(nil, "test", BoundNS{})
x.BlankLine()
x.End(false)
},
Out: strings.TrimRight(out(`
<?xml version="1.0" encoding="UTF-8"?><test></test>
`), "\n"),
},
{
Name: "EmptyXHTML",
Do: func(x *XMLWriter) {
xhtml := BoundNS{"http://www.w3.org/1999/xhtml", ""}
x.Indent("\t")
x.DefaultProcInst()
x.Directive([]byte("DOCTYPE html"))
x.Start(xhtml, "html", xhtml)
x.Text(false, "\n")
x.End(false)
},
Out: out(`
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
</html>
`),
},
{
Name: "ComplexXHTML",
Do: func(x *XMLWriter) {
xhtml := BoundNS{"http://www.w3.org/1999/xhtml", ""}
svg := BoundNS{"http://www.w3.org/2000/svg", ""}
xlink := BoundNS{"http://www.w3.org/1999/xlink", "xlink"}
xlink1 := BoundNS{"http://www.w3.org/1999/xlink", "xlink1"} // for testing
x.Indent("\t")
x.DefaultProcInst()
x.Directive([]byte("DOCTYPE html"))
x.Start(xhtml, "html", xhtml)
{
x.Start(xhtml, "head")
{
x.Start(xhtml, "title")
x.Comment(false, "")
x.Text(false, "test")
x.End(false)
}
{
x.Start(xhtml, "link")
x.Attr(xhtml, "rel", "stylesheet")
x.Attr(xhtml, "href", "style.css")
x.End(true)
}
x.End(false)
}
x.Comment(false, "test 1")
x.Comment(false, "test 2")
x.Comment(true, "test 3")
x.Comment(true, "test 4")
x.Comment(false, "test 5")
{
x.Start(xhtml, "body")
{
x.Start(xhtml, "p")
x.Text(false, "sdfsdf")
x.End(false)
}
{
x.Start(xhtml, "p")
x.Text(true, "sdfsdf")
x.Text(true, "sdfsdf")
x.End(false)
}
{
x.Start(xhtml, "p")
x.Text(true, "sdfsdf")
x.Text(false, "sdfsdf")
x.End(false)
}
{
x.Start(xhtml, "p")
x.Text(false, "sdfsdf")
x.Text(false, "sdfsdf")
x.End(false)
}
x.BlankLine()
{
x.Start(svg, "svg", svg)
{
x.Start(svg, "a", xlink)
x.Attr(xlink, "href", "https://example.com")
{
x.Start(svg, "text")
x.Attr(svg, "x", "0")
x.Attr(svg, "y", "0")
x.Text(false, "test")
x.End(false)
}
x.End(false)
}
{
x.Start(svg, "a", xlink1)
x.Attr(xlink1, "href", "https://example.com/?asd=<&sdf")
{
x.Start(svg, "text")
x.Attr(svg, "x", "0")
x.Attr(svg, "y", "0")
x.Text(false, "t<est\nsdf")
x.End(false)
}
x.End(false)
}
x.End(false)
}
x.End(false)
}
x.End(false)
},
Out: out(`
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title><!---->test</title>
<link rel="stylesheet" href="style.css"/>
</head><!--test 1--><!--test 2--><!--test 3-->
<!--test 4--><!--test 5--><body>
<p>sdfsdf</p>
<p>
sdfsdf
sdfsdf
</p>
<p>
sdfsdfsdfsdf</p>
<p>sdfsdfsdfsdf</p>
<svg xmlns="http://www.w3.org/2000/svg">
<a xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://example.com">
<text x="0" y="0">test</text>
</a>
<a xmlns:xlink1="http://www.w3.org/1999/xlink" xlink1:href="https://example.com/?asd=<&sdf">
<text x="0" y="0">t<est
sdf</text>
</a>
</svg>
</body>
</html>
`),
},
{
Name: "BadAttrInsertionOrder",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.DefaultProcInst()
x.Start(BoundNS{}, "test", BoundNS{})
x.Text(false, "sdf")
x.Attr(BoundNS{}, "sdf", "fgh")
x.End(false)
},
},
{
Name: "InvalidSelfClosingElement",
Do: func(x *XMLWriter) {
x.Start(BoundNS{}, "test", BoundNS{})
x.Text(false, "sdf")
x.End(true)
},
},
{
Name: "InvalidDirective",
Do: func(x *XMLWriter) {
x.Directive([]byte(">"))
},
},
{
Name: "InvalidXMLProcInst",
Do: func(x *XMLWriter) {
x.Start(nil, "test", BoundNS{})
x.ProcInst("xml", "sdfsdf")
x.End(true)
},
},
{
Name: "InvalidProcInst1",
Do: func(x *XMLWriter) {
x.Start(nil, "test", BoundNS{})
x.ProcInst("!", "sdf")
x.End(true)
},
},
{
Name: "InvalidProcInst2",
Do: func(x *XMLWriter) {
x.Start(nil, "test", BoundNS{})
x.ProcInst("sdf", "?>")
x.End(true)
},
},
{
Name: "DirectiveValidation",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Directive([]byte(`<!--<--> "><!---->"` + "\n" + ` <!--"<"--><<s>>`))
},
Out: out(`
<!<!--<--> "><!---->"
<!--"<"--><<s>>>
`),
},
{
Name: "InvalidComment",
Do: func(x *XMLWriter) {
x.Comment(false, "-->")
},
},
{
Name: "Escaping",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Start(BoundNS{}, "test", BoundNS{})
x.Attr(BoundNS{}, "test", `"'&<>;`+"\t\n\r\xff")
x.Text(true, `"'&<>;`+"\t\n\r\xff")
x.End(false)
},
Out: out(`
<test test=""'&<>;	

` + "\uFFFD" + `">
"'&<>;	

` + "\uFFFD" + `
</test>
`),
},
{
Name: "SingleCommentIndent",
Do: func(x *XMLWriter) {
x.Indent("\t")
x.Comment(false, "test")
},
Out: out(`
<!--test-->
`),
},
{
Name: "ComplexNamespaces",
Do: func(x *XMLWriter) {
x.Indent("\t")
ns1a := BoundNS{"", ""}
ns2a := BoundNS{"https://example.com/ns2", "ns2a"}
ns2b := BoundNS{"https://example.com/ns2", "ns2b"}
ns2c := BoundNS{"https://example.com/ns2", ""}
ns4a := BoundNS{"https://example.com/ns4", "ns4a"}
ns4b := BoundNS{"https://example.com/ns4", ""}
ns42 := BoundNS{"https://example.com/ns4", "ns2a"}
{
x.Start(ns1a, "nons", ns1a, ns2a)
{
x.Start(ns2a, "ns2", ns2b)
{
x.Start(ns2b, "ns2", ns2c)
x.End(true)
}
{
x.Start(ns2c, "ns2", ns2c, ns4a)
{
x.Start(ns2c, "ns2")
x.Attr(ns2c, "ns2", "test")
x.Attr(ns4a, "ns4", "test")
x.End(false)
}
{
x.Start(ns4b, "ns4", ns4b)
x.Attr(ns2a, "ns2", "test")
x.Attr(ns4b, "ns4", "test")
x.End(true)
}
{
x.Start(ns4b, "ns4", ns4b)
x.Attr(ns2a, "ns2", "test")
x.Attr(ns4b, "ns4", "test")
x.End(true)
}
{
x.Start(ns2c.URI, "ns2", ns4b)
x.Attr(ns2a.URI, "ns2", "test")
x.Attr(ns4a.URI, "ns4", "test")
x.End(true)
}
{
x.Start(ns4a.URI, "ns4")
x.Attr(ns2a.URI, "ns2", "test")
x.Attr(ns4a.URI, "ns4", "test")
x.End(true)
}
{
x.Start(ns4a.URI, "ns4", ns4b, ns42)
x.Attr(ns2a.URI, "ns2", "test")
x.Attr(ns4a.URI, "ns4", "test")
{
x.Start(ns1a.URI, "nons", ns1a)
x.Attr(ns1a.URI, "nons", "test")
x.Attr(ns4a.URI, "ns4", "test")
{
x.Start(nil, "curns")
x.Attr(nil, "curns", "test")
x.Attr(ns2a.URI, "ns2", "test")
x.Attr(ns4a.URI, "ns4", "test")
x.End(true)
}
{
x.Start(Prefix(""), "el")
x.Attr(nil, "curns", "test")
x.End(true)
}
{
x.Start(Prefix("ns2a"), "el")
x.Attr(nil, "curns", "test")
x.End(true)
}
x.End(false)
}
{
x.Start(nil, "curns")
x.Attr(nil, "curns", "test")
x.End(true)
}
x.End(false)
}
{
x.Start(nil, "curns")
x.Attr(nil, "curns", "test")
x.End(true)
}
x.End(false)
}
x.End(false)
}
x.End(false)
}
},
Out: out(`
<nons xmlns:ns2a="https://example.com/ns2">
<ns2a:ns2 xmlns:ns2b="https://example.com/ns2">
<ns2b:ns2 xmlns="https://example.com/ns2"/>
<ns2 xmlns="https://example.com/ns2" xmlns:ns4a="https://example.com/ns4">
<ns2 ns2="test" ns4a:ns4="test"></ns2>
<ns4 xmlns="https://example.com/ns4" ns2a:ns2="test" ns4="test"/>
<ns4 xmlns="https://example.com/ns4" ns2a:ns2="test" ns4="test"/>
<ns2b:ns2 xmlns="https://example.com/ns4" ns2="test" ns4a:ns4="test"/>
<ns4a:ns4 ns2b:ns2="test" ns4="test"/>
<ns2a:ns4 xmlns="https://example.com/ns4" xmlns:ns2a="https://example.com/ns4" ns2b:ns2="test" ns4="test">
<nons xmlns="" nons="test" ns2a:ns4="test">
<curns curns="test" ns2b:ns2="test" ns2a:ns4="test"/>
<el curns="test"/>
<ns2a:el curns="test"/>
</nons>
<curns curns="test"/>
</ns2a:ns4>
<curns curns="test"/>
</ns2>
</ns2a:ns2>
</nons>
`),
},
{
Name: "StickyError",
Do: func(x *XMLWriter) {
x.e = errors.New("test")
x.DefaultProcInst()
x.Start(nil, "test", BoundNS{})
x.ProcInst("test", "test")
x.Comment(false, "test")
x.Raw([]byte("test"))
x.Text(false, "test")
x.Start(nil, "test")
x.End(true)
x.End(false)
},
},
{
Name: "Stuff",
Do: func(x *XMLWriter) {
x.DefaultProcInst()
x.Start(nil, "test", BoundNS{})
x.ProcInst("test", "test")
x.Comment(false, "test")
x.Raw([]byte("test"))
x.Text(false, "test")
x.Start(nil, "test")
x.End(true)
x.End(false)
},
Out: `<?xml version="1.0" encoding="UTF-8"?><test><?test test?><!--test-->testtest<test/></test>`,
},
} {
tc := tc
t.Run(tc.Name, func(t *testing.T) {
var b bytes.Buffer
x := New(&b)
tc.Do(x)
err1 := x.Err()
if err := x.Close(); err != nil {
if tc.Out != "" {
t.Errorf("unexpected error: %v", err)
t.Log(b.String())
}
if err1 != nil && err != err1 {
t.Errorf("Err() does not return nothing or the same error: expected %v, got %v", err, err1)
}
} else {
if tc.Out == "" {
t.Errorf("expected error, got nil")
} else if tc.Out != b.String() {
t.Errorf("wrong output\nexpected:\n%s\ngot:\n%s\n", " "+strings.ReplaceAll(tc.Out, "\n", "\n "), " "+strings.ReplaceAll(b.String(), "\n", "\n "))
}
if !tc.NoValidate {
d := xml.NewDecoder(&b)
d.Strict = true
for {
if _, err := d.Token(); err != nil {
if err != io.EOF {
t.Errorf("invalid xml: %v", err)
t.Log(b.String())
}
break
}
}
}
}
})
}
}