test: add test for pie chart

pie_chart_test.go

@@ -0,0 +1,67 @@
+// 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 TestPieChartRender(t *testing.T) {
+	assert := assert.New(t)
+
+	d, err := NewDraw(DrawOption{
+		Width:  250,
+		Height: 150,
+	})
+	assert.Nil(err)
+
+	f, _ := chart.GetDefaultFont()
+
+	err = pieChartRender(pieChartOption{
+		Font: f,
+		SeriesList: NewPieSeriesList([]float64{
+			5,
+			10,
+		}, PieSeriesOption{
+			Names: []string{
+				"a",
+				"b",
+			},
+			Label: SeriesLabel{
+				Show:  true,
+				Color: drawing.ColorRed,
+			},
+			Radius: "20%",
+		}),
+	}, &basicRenderResult{
+		d: d,
+	})
+	assert.Nil(err)
+	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=\"250\" height=\"150\">\\n<path  d=\"M 125 75\nL 125 45\nA 30 30 120.00 0 1 150 89\nL 125 75\nZ\" style=\"stroke-width:1;stroke:rgba(84,112,198,1.0);fill:rgba(84,112,198,1.0)\"/><path  d=\"M 150 60\nL 159 55\nM 159 55\nL 169 55\" style=\"stroke-width:1;stroke:rgba(84,112,198,1.0);fill:rgba(84,112,198,1.0)\"/><text x=\"172\" y=\"60\" style=\"stroke-width:0;stroke:none;fill:rgba(255,0,0,1.0);font-size:12.8px;font-family:'Roboto Medium',sans-serif\">a: 33.33%</text><path  d=\"M 125 75\nL 150 89\nA 30 30 240.00 1 1 125 45\nL 125 75\nZ\" style=\"stroke-width:1;stroke:rgba(145,204,117,1.0);fill:rgba(145,204,117,1.0)\"/><path  d=\"M 100 90\nL 91 95\nM 91 95\nL 81 95\" style=\"stroke-width:1;stroke:rgba(145,204,117,1.0);fill:rgba(145,204,117,1.0)\"/><text x=\"22\" y=\"100\" style=\"stroke-width:0;stroke:none;fill:rgba(255,0,0,1.0);font-size:12.8px;font-family:'Roboto Medium',sans-serif\">b: 66.66%</text></svg>", string(data))
+}

series.go

@@ -95,7 +95,8 @@ type SeriesList []Series
 
 type PieSeriesOption struct {
 	Radius string
-	LabelShow bool
+	Label  SeriesLabel
+	Names  []string
 }
 
 func NewPieSeriesList(values []float64, opts ...PieSeriesOption) []Series {
@@ -105,6 +106,10 @@ func NewPieSeriesList(values []float64, opts ...PieSeriesOption) []Series {
 		opt = opts[0]
 	}
 	for index, v := range values {
+		name := ""
+		if index < len(opt.Names) {
+			name = opt.Names[index]
+		}
 		s := Series{
 			Type: ChartTypePie,
 			Data: []SeriesData{
@@ -113,9 +118,8 @@ func NewPieSeriesList(values []float64, opts ...PieSeriesOption) []Series {
 				},
 			},
 			Radius: opt.Radius,
-			Label: SeriesLabel{
+			Label:  opt.Label,
-				Show: opt.LabelShow,
+			Name:   name,
-			},
 		}
 		result[index] = s
 	}

series_test.go

@@ -69,6 +69,7 @@ func TestNewPieSeriesList(t *testing.T) {
 	assert.Equal([]Series{
 		{
 			Type: ChartTypePie,
+			Name: "a",
 			Label: SeriesLabel{
 				Show: true,
 			},
@@ -81,6 +82,7 @@ func TestNewPieSeriesList(t *testing.T) {
 		},
 		{
 			Type: ChartTypePie,
+			Name: "b",
 			Label: SeriesLabel{
 				Show: true,
 			},
@@ -96,7 +98,13 @@ func TestNewPieSeriesList(t *testing.T) {
 		2,
 	}, PieSeriesOption{
 		Radius: "30%",
-		LabelShow: true,
+		Label: SeriesLabel{
+			Show: true,
+		},
+		Names: []string{
+			"a",
+			"b",
+		},
 	}))
 }