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Updated testing

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Added svgWriter
Refactored
This commit is contained in:
mitch 2022-01-19 23:56:30 -05:00
parent 09ccafb97b
commit 9a21ca4d26
6 changed files with 96 additions and 63 deletions
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3
.gitignore vendored
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@ -93,7 +93,6 @@ $RECYCLE.BIN/
*.msix
*.msm
*.msp
# Windows shortcuts
*.lnk
@ -103,3 +102,5 @@ $RECYCLE.BIN/
.vscode/*
.idea
/clockface/clockface
*.svg

12
clockface.go
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@ -5,23 +5,11 @@ import (
"time"
)
const secondHandLength = 90
const clockCentreX = 150
const clockCentreY = 150
type Point struct {
X float64
Y float64
}
func SecondHand(t time.Time) Point {
p := secondHandPoint(t)
p = Point{p.X * secondHandLength, p.Y * secondHandLength} //scale
p = Point{p.X, -p.Y} //flip
p = Point{p.X + clockCentreX, p.Y + clockCentreY} //translate
return p
}
func secondsInRadians(t time.Time) float64 {
return math.Pi / (30 / (float64(t.Second())))
}

24
clockface/main.go
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@ -1,34 +1,12 @@
package main
import (
"fmt"
"git.nerdfortress.dev/mitch/clockface"
"io"
"os"
"time"
)
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)
clockface.SVGWriter(os.Stdout, t)
}
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>`

59
clockface_acceptance_test.go
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@ -1,28 +1,55 @@
package clockface
import (
"bytes"
"encoding/xml"
"testing"
"time"
)
func TestSecondHandAtMidnight(t *testing.T) {
type Svg struct {
XMLName xml.Name `xml:"svg"`
Text string `xml:",chardata"`
Xmlns string `xml:"xmlns,attr"`
Width string `xml:"width,attr"`
Height string `xml:"height,attr"`
ViewBox string `xml:"viewBox,attr"`
Version string `xml:"version,attr"`
Circle struct {
Text string `xml:",chardata"`
Cx string `xml:"cx,attr"`
Cy string `xml:"cy,attr"`
R string `xml:"r,attr"`
Style string `xml:"style,attr"`
} `xml:"circle"`
Line []struct {
Text string `xml:",chardata"`
X1 string `xml:"x1,attr"`
Y1 string `xml:"y1,attr"`
X2 string `xml:"x2,attr"`
Y2 string `xml:"y2,attr"`
Style string `xml:"style,attr"`
} `xml:"line"`
}
func TestSVGWriterAtMidnight(t *testing.T) {
tm := time.Date(1337, time.January, 1, 0, 0, 0, 0, time.UTC)
b := bytes.Buffer{}
want := Point{X: 150, Y: 150 - 90}
got := SecondHand(tm)
SVGWriter(&b, tm)
if got != want {
t.Errorf("Got %v, want %v", got, want)
}
}
func TestSecondHandAt30Seconds(t *testing.T) {
tm := time.Date(1337, time.January, 1, 0, 0, 30, 0, time.UTC)
want := Point{X: 150, Y: 150 + 90}
got := SecondHand(tm)
if got != want {
t.Errorf("Got %v, wanted %v", got, want)
svg := Svg{}
xml.Unmarshal(b.Bytes(), &svg)
x2 := "150.000"
y2 := "60.000"
for _, line := range svg.Line {
if line.X2 == x2 && line.Y2 == y2 {
return
}
}
t.Errorf("Expected to find the second hand with x2 of %v and y2 of %v, in the SVG output %v", x2, y2, b.String())
}

20
clockface_test.go
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@ -6,14 +6,6 @@ import (
"time"
)
func simpleTime(hours, minutes, seconds int) time.Time {
return time.Date(312, time.October, 28, hours, minutes, seconds, 0, time.UTC)
}
func testName(t time.Time) string {
return t.Format("15:04:05")
}
func TestSecondsInRadians(t *testing.T) {
cases := []struct {
time time.Time
@ -28,14 +20,14 @@ func TestSecondsInRadians(t *testing.T) {
for _, c := range cases {
t.Run(testName(c.time), func(t *testing.T) {
got := secondsInRadians(c.time)
if !roughlyEqualFloat64(got, c.angle) {
if got != c.angle {
t.Fatalf("Wanted %v radians, but got %v", c.angle, got)
}
})
}
}
func TestSecondHandVector(t *testing.T) {
func TestSecondHandPoint(t *testing.T) {
cases := []struct {
time time.Time
point Point
@ -63,3 +55,11 @@ func roughlyEqualPoint(a, b Point) bool {
return roughlyEqualFloat64(a.X, b.X) &&
roughlyEqualFloat64(a.Y, b.Y)
}
func simpleTime(hours, minutes, seconds int) time.Time {
return time.Date(312, time.October, 28, hours, minutes, seconds, 0, time.UTC)
}
func testName(t time.Time) string {
return t.Format("15:04:05")
}

39
svgWriter.go Normal file
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@ -0,0 +1,39 @@
package clockface
import (
"fmt"
"io"
"time"
)
const secondHandLength = 90
const clockCentreX = 150
const clockCentreY = 150
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>`
//SVGWriter writes an SVG representation of an analog clock, showing the time t, to the writer w
func SVGWriter(w io.Writer, t time.Time) {
io.WriteString(w, svgStart)
io.WriteString(w, bezel)
SecondHand(w, t)
io.WriteString(w, svgEnd)
}
func SecondHand(w io.Writer, t time.Time) {
p := secondHandPoint(t)
p = Point{p.X * secondHandLength, p.Y * secondHandLength} //scale
p = Point{p.X, -p.Y} //flip
p = Point{p.X + clockCentreX, p.Y + clockCentreY} //translate
fmt.Fprintf(w, `<line x1="150" y1="150" x2="%.3f" y2="%.3f" style="fill:none;stroke:#f00;stroke-width:3px;"/>`, p.X, p.Y)
}