go-chart/vector_renderer_test.go

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2016-07-11 08:21:19 +02:00
package chart
import (
"bytes"
"strings"
"testing"
"github.com/blendlabs/go-assert"
)
func TestVectorRendererPath(t *testing.T) {
assert := assert.New(t)
vr, err := SVG(100, 100)
assert.Nil(err)
typed, isTyped := vr.(*vectorRenderer)
assert.True(isTyped)
typed.MoveTo(0, 0)
typed.LineTo(100, 100)
typed.LineTo(0, 100)
typed.Close()
typed.FillStroke()
buffer := bytes.NewBuffer([]byte{})
err = typed.Save(buffer)
assert.Nil(err)
raw := string(buffer.Bytes())
assert.True(strings.HasPrefix(raw, "<svg"))
assert.True(strings.HasSuffix(raw, "</svg>"))
}
func TestVectorRendererMeasureText(t *testing.T) {
assert := assert.New(t)
f, err := GetDefaultFont()
assert.Nil(err)
vr, err := SVG(100, 100)
assert.Nil(err)
vr.SetDPI(DefaultDPI)
vr.SetFont(f)
vr.SetFontSize(12.0)
w, h := vr.MeasureText("Ljp")
assert.Equal(26, w)
assert.Equal(15, h)
}