test: add test for mark line

mark_line.go

@@ -85,7 +85,7 @@ func markLineRender(opt *markLineRenderOption) {
 		width := d.Box.Width()
 		text := commafWithDigits(value)
 		textBox := r.MeasureText(text)
-		d.makeLine(0, y, width)
+		d.makeLine(0, y, width-2)
 		d.text(text, width, y+textBox.Height()>>1-2)
 	}
 

mark_line_test.go

@@ -0,0 +1,99 @@
+// MIT License
+
+// Copyright (c) 2022 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+func TestNewMarkLine(t *testing.T) {
+	assert := assert.New(t)
+
+	markLine := NewMarkLine(
+		SeriesMarkDataTypeMax,
+		SeriesMarkDataTypeMin,
+		SeriesMarkDataTypeAverage,
+	)
+
+	assert.Equal(SeriesMarkLine{
+		Data: []SeriesMarkLineData{
+			{
+				Type: SeriesMarkDataTypeMax,
+			},
+			{
+				Type: SeriesMarkDataTypeMin,
+			},
+			{
+				Type: SeriesMarkDataTypeAverage,
+			},
+		},
+	}, markLine)
+}
+
+func TestMarkLineRender(t *testing.T) {
+	assert := assert.New(t)
+
+	d, err := NewDraw(DrawOption{
+		Width:  400,
+		Height: 300,
+	}, PaddingOption(chart.Box{
+		Left:  20,
+		Right: 20,
+	}))
+	assert.Nil(err)
+	f, _ := chart.GetDefaultFont()
+
+	markLineRender(&markLineRenderOption{
+		Draw:        d,
+		FillColor:   drawing.ColorBlack,
+		FontColor:   drawing.ColorBlack,
+		StrokeColor: drawing.ColorBlack,
+		Font:        f,
+		Series: &Series{
+			MarkLine: NewMarkLine(
+				SeriesMarkDataTypeMax,
+				SeriesMarkDataTypeMin,
+				SeriesMarkDataTypeAverage,
+			),
+			Data: NewSeriesDataFromValues([]float64{
+				1,
+				3,
+				5,
+				7,
+				9,
+			}),
+		},
+		Range: &Range{
+			Min:  0,
+			Max:  10,
+			Size: 200,
+		},
+	})
+	data, err := d.Bytes()
+	assert.Nil(err)
+	assert.Equal("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"400\" height=\"300\">\\n<circle cx=\"20\" cy=\"20\" r=\"3\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"M 25 20\nL 362 20\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path  d=\"M 362 15\nL 378 20\nL 362 25\nL 367 20\nL 362 15\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><text x=\"380\" y=\"24\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:12.8px;font-family:'Roboto Medium',sans-serif\">9</text><circle cx=\"20\" cy=\"180\" r=\"3\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"M 25 180\nL 362 180\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path  d=\"M 362 175\nL 378 180\nL 362 185\nL 367 180\nL 362 175\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><text x=\"380\" y=\"184\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:12.8px;font-family:'Roboto Medium',sans-serif\">1</text><circle cx=\"20\" cy=\"100\" r=\"3\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path stroke-dasharray=\"4.0, 2.0\" d=\"M 25 100\nL 362 100\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><path  d=\"M 362 95\nL 378 100\nL 362 105\nL 367 100\nL 362 95\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/><text x=\"380\" y=\"104\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:12.8px;font-family:'Roboto Medium',sans-serif\">5</text></svg>", string(data))
+}