✨ (clockface): add build svg string

Author: yuanyu90221

clockface/clockface.go renamed to clockface_sample/clockface/clockface.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/leetcode-golang-classroom/learn-golang-with-tests/clockface"
+	clockface "github.com/leetcode-golang-classroom/learn-golang-with-tests/clockface_sample/clockface"
 )
 
 func TestSecondHandAtMidnight(t *testing.T) {

clockface/clockface_acceptance_test.go renamed to clockface_sample/clockface/clockface_acceptance_test.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	"github.com/leetcode-golang-classroom/learn-golang-with-tests/clockface_sample/clockface"
+)
+
+func main() {
+	t := time.Now()
+	sh := clockface.SecondHand(t)
+	io.WriteString(os.Stdout, svgStart)
+	io.WriteString(os.Stdout, bezel)
+	io.WriteString(os.Stdout, secondHandTag(sh))
+	io.WriteString(os.Stdout, svgEnd)
+}
+
+func secondHandTag(p clockface.Point) string {
+	return fmt.Sprintf(`<line x1="150" y1="150" x2="%f" y2="%f" style="fill:none;stroke:#f00;stroke-width:3px;"/>`, p.X, p.Y)
+}
+
+const svgStart = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg"
+     width="100%"
+     height="100%"
+     viewBox="0 0 300 300"
+     version="2.0">`
+
+const bezel = `<circle cx="150" cy="150" r="100" style="fill:#fff;stroke:#000;stroke-width:5px;"/>`
+
+const svgEnd = `</svg>`