go-chart/pie_chart_test.go

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package chart
import (
"bytes"
"testing"
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assert "github.com/blend/go-sdk/assert"
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)
func TestPieChart(t *testing.T) {
assert := assert.New(t)
pie := PieChart{
Canvas: Style{
FillColor: ColorLightGray,
},
Values: []Value{
{Value: 10, Label: "Blue"},
{Value: 9, Label: "Green"},
{Value: 8, Label: "Gray"},
{Value: 7, Label: "Orange"},
{Value: 6, Label: "HEANG"},
{Value: 5, Label: "??"},
{Value: 2, Label: "!!"},
},
}
b := bytes.NewBuffer([]byte{})
pie.Render(PNG, b)
assert.NotZero(b.Len())
}
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func TestPieChartDropsZeroValues(t *testing.T) {
assert := assert.New(t)
pie := PieChart{
Canvas: Style{
FillColor: ColorLightGray,
},
Values: []Value{
{Value: 5, Label: "Blue"},
{Value: 5, Label: "Green"},
{Value: 0, Label: "Gray"},
},
}
b := bytes.NewBuffer([]byte{})
err := pie.Render(PNG, b)
assert.Nil(err)
}
func TestPieChartAllZeroValues(t *testing.T) {
assert := assert.New(t)
pie := PieChart{
Canvas: Style{
FillColor: ColorLightGray,
},
Values: []Value{
{Value: 0, Label: "Blue"},
{Value: 0, Label: "Green"},
{Value: 0, Label: "Gray"},
},
}
b := bytes.NewBuffer([]byte{})
err := pie.Render(PNG, b)
assert.NotNil(err)
}