things.

vector_renderer_test.go

@@ -0,0 +1,52 @@
+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)
+}