tests

bar_chart_test.go

@@ -0,0 +1,144 @@
+package chart
+
+import (
+	"bytes"
+	"math"
+	"testing"
+
+	assert "github.com/blendlabs/go-assert"
+)
+
+func TestBarChartProps(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{}
+
+	assert.Equal(DefaultDPI, bc.GetDPI())
+	bc.DPI = 100
+	assert.Equal(100, bc.GetDPI())
+
+	assert.Nil(bc.GetFont())
+	f, err := GetDefaultFont()
+	assert.Nil(err)
+	bc.Font = f
+	assert.NotNil(bc.GetFont())
+
+	assert.Equal(DefaultChartWidth, bc.GetWidth())
+	bc.Width = DefaultChartWidth - 1
+	assert.Equal(DefaultChartWidth-1, bc.GetWidth())
+
+	assert.Equal(DefaultChartHeight, bc.GetHeight())
+	bc.Height = DefaultChartHeight - 1
+	assert.Equal(DefaultChartHeight-1, bc.GetHeight())
+
+	assert.Equal(DefaultBarSpacing, bc.GetBarSpacing())
+	bc.BarSpacing = 150
+	assert.Equal(150, bc.GetBarSpacing())
+
+	assert.Equal(DefaultBarWidth, bc.GetBarWidth())
+	bc.BarWidth = 75
+	assert.Equal(75, bc.GetBarWidth())
+}
+
+func TestBarChartRenderNoBars(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{}
+	err := bc.Render(PNG, bytes.NewBuffer([]byte{}))
+	assert.NotNil(err)
+}
+
+func TestBarChartGetRanges(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{}
+
+	yr := bc.getRanges()
+	assert.NotNil(yr)
+	assert.False(yr.IsZero())
+
+	assert.Equal(-math.MaxFloat64, yr.GetMax())
+	assert.Equal(math.MaxFloat64, yr.GetMin())
+}
+
+func TestBarChartGetRangesBarsMinMax(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{
+		Bars: []Value{
+			{Value: 1.0},
+			{Value: 10.0},
+		},
+	}
+
+	yr := bc.getRanges()
+	assert.NotNil(yr)
+	assert.False(yr.IsZero())
+
+	assert.Equal(10, yr.GetMax())
+	assert.Equal(1, yr.GetMin())
+}
+
+func TestBarChartGetRangesMinMax(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{
+		YAxis: YAxis{
+			Range: &ContinuousRange{
+				Min: 5.0,
+				Max: 15.0,
+			},
+			Ticks: []Tick{
+				{Value: 7.0, Label: "Foo"},
+				{Value: 11.0, Label: "Foo2"},
+			},
+		},
+		Bars: []Value{
+			{Value: 1.0},
+			{Value: 10.0},
+		},
+	}
+
+	yr := bc.getRanges()
+	assert.NotNil(yr)
+	assert.False(yr.IsZero())
+
+	assert.Equal(15, yr.GetMax())
+	assert.Equal(5, yr.GetMin())
+}
+
+func TestBarChartGetRangesTicksMinMax(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{
+		YAxis: YAxis{
+			Ticks: []Tick{
+				{Value: 7.0, Label: "Foo"},
+				{Value: 11.0, Label: "Foo2"},
+			},
+		},
+		Bars: []Value{
+			{Value: 1.0},
+			{Value: 10.0},
+		},
+	}
+
+	yr := bc.getRanges()
+	assert.NotNil(yr)
+	assert.False(yr.IsZero())
+
+	assert.Equal(11, yr.GetMax())
+	assert.Equal(7, yr.GetMin())
+}
+
+func TestBarChartHasAxes(t *testing.T) {
+	assert := assert.New(t)
+
+	bc := BarChart{}
+	assert.False(bc.hasAxes())
+	bc.YAxis = YAxis{
+		Style: StyleShow(),
+	}
+
+	assert.True(bc.hasAxes())
+}