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parser_test.go
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parser_test.go
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package svg
import (
"fmt"
"os"
"strings"
"testing"
"github.com/cheekybits/is"
)
const testSvg = `<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 15.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="595.201px" height="841.922px" viewBox="0 0 595.201 841.922" enable-background="new 0 0 595.201 841.922"
xml:space="preserve">
<rect x="207" y="53" fill="#009FE3" width="181.667" height="85.333"/>
<text transform="matrix(1 0 0 1 232.3306 107.5952)" fill="#FFFFFF" font-family="'ArialMT'" font-size="31.9752">PODIUM</text>
<g><text transform="matrix(1 0 0 1 232.3306 107.5952)" fill="#FFFFFF" font-family="'ArialMT'" font-size="31.9752">PODIUM</text></g>
</svg>`
func TestParse(t *testing.T) {
is := is.New(t)
svg, err := ParseSvg(testSvg, "test", 0)
is.NoErr(err)
is.NotNil(svg)
svg, err = ParseSvgFromReader(strings.NewReader(testSvg), "test", 0)
is.NoErr(err)
is.NotNil(svg)
}
func TestTransform(t *testing.T) {
content := `<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
width="684.000000pt" height="630.000000pt" viewBox="0 0 684.000000 630.000000"
preserveAspectRatio="xMidYMid meet">
<g transform="translate(0.000000,630.000000) scale(0.100000,-0.100000)"
fill="#ff0000" stroke="none">
<path d="M1705 6274 c-758 -115 -1377 -637 -1614 -1360 -74 -227 -86 -311 -86
-624 0 -248 2 -286 23 -389 64 -315 210 -626 414 -880 34 -42 715 -731 1515
-1531 l1453 -1455 1444 1445 c794 795 1473 1481 1510 1524 98 117 189 259 261
409 233 479 267 1011 99 1516 -240 718 -861 1235 -1615 1345 -138 21 -430 21
-564 1 -213 -32 -397 -87 -580 -174 -188 -90 -319 -177 -478 -316 l-77 -66
-77 66 c-309 270 -657 431 -1054 489 -132 20 -447 20 -574 0z"/>
</g>
</svg>
`
s, err := ParseSvg(content, "transformed heart", 0)
if err != nil {
t.Fatalf("cannot parse svg %v", content)
}
if len(s.Groups) < 1 {
t.Fatal("group not found")
}
g := s.Groups[0]
t.Logf("original: transform=\"%v\"", g.TransformString)
m := *g.Transform
a, c, e := m[0][0], m[0][1], m[0][2]
b, d, f := m[1][0], m[1][1], m[1][2]
// see https://www.w3.org/TR/SVGTiny12 for [a b c d e f] vector notation
t.Logf("accumulated: transform=\"matrix(%v %v %v %v %v %v)\"", a, b, c, d, e, f)
if !(a == 0.1 && d == -0.1 && f == 630) {
t.Error("mismatch expected transform matrix(0.1 0 0 -0.1 0 630)")
}
}
func Test2Curves(t *testing.T) {
content := `<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
viewBox="0 -450 1000 1000">
<path fill="none" stroke="red" stroke-width="5"
d="M100 200 C25 100 400 100 400 200 400 100 775 100 700 200 L400 450z" />
</svg>
`
s, err := ParseSvg(content, "heart", 1)
if err != nil {
t.Fatalf("cannot parse svg %v", content)
}
dis, _ := s.ParseDrawingInstructions()
strux := []*DrawingInstruction{}
for di := range dis {
strux = append(strux, di)
}
curveIdx := 2
di := strux[curveIdx]
if di.Kind != CurveInstruction {
t.Fatalf("expect curve drawing instructions, got %v", di)
}
p := di.CurvePoints // 400 100 775 100 700 200
if !(p.C1[0] == 400 && p.C2[0] == 775 && p.T[0] == 700) {
t.Fatalf("expect [400 100] [775 100] [700 200], got %v %v %v", *p.C1, *p.C2, *p.T)
}
}
func TestPathRelScale(t *testing.T) {
content := `<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
viewBox="0 -600 800 500">
<g transform="scale(1,-1)">
<path fill="none" stroke="red" stroke-width="5"
d="M100 200 c-75 -100 300 -100 300 0 0 -100 375 -100 300 0 l-300 350z" />
</g>
</svg>
`
s, err := ParseSvg(content, "", 1)
if err != nil {
t.Fatalf("cannot parse svg %v", content)
}
dis, _ := s.ParseDrawingInstructions()
strux := []*DrawingInstruction{}
for di := range dis {
strux = append(strux, di)
}
curveIdx := 1 // Move Curve*2 Line Close Paint
di := strux[curveIdx]
if di.Kind != CurveInstruction {
t.Fatalf("expect curve (c) instruction at %v, got %v", curveIdx, di)
}
if di.CurvePoints.T[1] != -200 { // [100+300, 200+0] scale by [1, -1]
t.Fatalf("expect 1st curve terminating at [400, -200], got %v",
*di.CurvePoints.T)
}
}
func TestPathRelTranslate(t *testing.T) {
content := `<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
viewBox="0 400 600 600">
<g fill="#ff0000" stroke="none" transform="translate(0,200)">
<path d="M170 627 c-75 -11 -137 -63 -161 -136 -7 -22 -8 -31 -8
-62 0 -24 0.2 -28 2 -38 z"/>
</g>
</svg>
`
s, err := ParseSvg(content, "", 1)
if err != nil {
t.Fatalf("cannot parse svg %v", content)
}
dis, errChan := s.ParseDrawingInstructions()
for e := range errChan {
t.Fatalf("parse drawing instruction: %v", e)
}
strux := []*DrawingInstruction{}
for di := range dis {
strux = append(strux, di)
}
c1 := strux[1]
c3 := strux[3]
if c1.CurvePoints.C1[1] != 816 || c3.CurvePoints.T[1] != 591 {
expect := "C95 816 33 764 9 691 C2 669 1 660 1 629 C1 605 1.2 601 3 591"
got := fmt.Sprintf("C%v %v ... %v", c1.CurvePoints.C1[0],
c1.CurvePoints.C1[1], c3.CurvePoints.T[1])
t.Fatalf("expect %v: got %v", expect, got)
}
}
func TestParsedPathString(t *testing.T) {
header := `<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
width="684pt" height="630pt" viewBox="0 0 684 630"
preserveAspectRatio="xMidYMid meet">
`
path := `<g transform="translate(0,630) scale(0.1,-0.1)"
fill="#ff0000" stroke="none">
<path d="M1705 6274 c-758 -115 -1377 -637 -1614 -1360 -74 -227 -86 -311 -86
-624 0 -248 2 -286 23 -389 64 -315 210 -626 414 -880 34 -42 715 -731 1515
-1531 l1453 -1455 1444 1445 c794 795 1473 1481 1510 1524 98 117 189 259 261
409 233 479 267 1011 99 1516 -240 718 -861 1235 -1615 1345 -138 21 -430 21
-564 1 -213 -32 -397 -87 -580 -174 -188 -90 -319 -177 -478 -316 l-77 -66
-77 66 c-309 270 -657 431 -1054 489 -132 20 -447 20 -574 0z"/>
</g>
`
tail := `</svg>
`
content := header + path + tail
s, err := ParseSvg(content, "heart", 1)
if err != nil {
t.Fatalf("cannot parse svg %v", content)
}
dis, errChan := s.ParseDrawingInstructions()
for e := range errChan {
t.Fatalf("drawing instruction error: %v", e)
}
strux := []*DrawingInstruction{}
for di := range dis {
strux = append(strux, di)
}
tmpdir := os.TempDir() + string(os.PathSeparator)
f0 := tmpdir + "heart.svg"
f, err := os.Create(f0)
if err != nil {
t.Errorf("error %v", err)
}
f.WriteString(content)
f.Close()
t.Logf("original shape in %v", f0)
parsed := PathStringFromDrawingInstructions(strux)
f1 := tmpdir + "parsedheart.svg"
f, err = os.Create(f1)
if err != nil {
t.Errorf("error %v", err)
}
f.WriteString(header + parsed + tail)
f.Close()
t.Logf("parsed shape in %v", f1)
t.Log("Please check consistency of above files, with web browser or eog")
}