package chart import ( "bytes" "math" "testing" "time" "github.com/blendlabs/go-assert" "github.com/wcharczuk/go-chart/drawing" ) func TestChartGetDPI(t *testing.T) { assert := assert.New(t) unset := Chart{} assert.Equal(DefaultDPI, unset.GetDPI()) assert.Equal(192, unset.GetDPI(192)) set := Chart{DPI: 128} assert.Equal(128, set.GetDPI()) assert.Equal(128, set.GetDPI(192)) } func TestChartGetFont(t *testing.T) { assert := assert.New(t) f, err := GetDefaultFont() assert.Nil(err) unset := Chart{} assert.Nil(unset.GetFont()) set := Chart{Font: f} assert.NotNil(set.GetFont()) } func TestChartGetWidth(t *testing.T) { assert := assert.New(t) unset := Chart{} assert.Equal(DefaultChartWidth, unset.GetWidth()) set := Chart{Width: DefaultChartWidth + 10} assert.Equal(DefaultChartWidth+10, set.GetWidth()) } func TestChartGetHeight(t *testing.T) { assert := assert.New(t) unset := Chart{} assert.Equal(DefaultChartHeight, unset.GetHeight()) set := Chart{Height: DefaultChartHeight + 10} assert.Equal(DefaultChartHeight+10, set.GetHeight()) } func TestChartGetRanges(t *testing.T) { assert := assert.New(t) c := Chart{ Series: []Series{ ContinuousSeries{ XValues: []float64{-2.0, -1.0, 0, 1.0, 2.0}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, ContinuousSeries{ XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{-2.1, -1.0, 0, 1.0, 2.0}, }, ContinuousSeries{ YAxis: YAxisSecondary, XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{10.0, 11.0, 12.0, 13.0, 14.0}, }, }, } xrange, yrange, yrangeAlt := c.getRanges() assert.Equal(-2.0, xrange.Min) assert.Equal(5.0, xrange.Max) assert.Equal(-2.1, yrange.Min) assert.Equal(4.5, yrange.Max) assert.Equal(10.0, yrangeAlt.Min) assert.Equal(14.0, yrangeAlt.Max) cSet := Chart{ XAxis: XAxis{ Range: Range{Min: 9.8, Max: 19.8}, }, YAxis: YAxis{ Range: Range{Min: 9.9, Max: 19.9}, }, YAxisSecondary: YAxis{ Range: Range{Min: 9.7, Max: 19.7}, }, Series: []Series{ ContinuousSeries{ XValues: []float64{-2.0, -1.0, 0, 1.0, 2.0}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, ContinuousSeries{ XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{-2.1, -1.0, 0, 1.0, 2.0}, }, ContinuousSeries{ YAxis: YAxisSecondary, XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{10.0, 11.0, 12.0, 13.0, 14.0}, }, }, } xr2, yr2, yra2 := cSet.getRanges() assert.Equal(9.8, xr2.Min) assert.Equal(19.8, xr2.Max) assert.Equal(9.9, yr2.Min) assert.Equal(19.9, yr2.Max) assert.Equal(9.7, yra2.Min) assert.Equal(19.7, yra2.Max) } func TestChartGetRangesUseTicks(t *testing.T) { assert := assert.New(t) // this test asserts that ticks should supercede manual ranges when generating the overall ranges. c := Chart{ YAxis: YAxis{ Ticks: []Tick{ {0.0, "Zero"}, {1.0, "1.0"}, {2.0, "2.0"}, {3.0, "3.0"}, {4.0, "4.0"}, {5.0, "Five"}, }, Range: Range{ Min: -5.0, Max: 5.0, }, }, Series: []Series{ ContinuousSeries{ XValues: []float64{-2.0, -1.0, 0, 1.0, 2.0}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, }, } xr, yr, yar := c.getRanges() assert.Equal(-2.0, xr.Min) assert.Equal(2.0, xr.Max) assert.Equal(0.0, yr.Min) assert.Equal(5.0, yr.Max) assert.True(yar.IsZero(), yar.String()) } func TestChartGetRangesUseUserRanges(t *testing.T) { assert := assert.New(t) // this test asserts that ticks should supercede manual ranges when generating the overall ranges. c := Chart{ YAxis: YAxis{ Range: Range{ Min: -5.0, Max: 5.0, }, }, Series: []Series{ ContinuousSeries{ XValues: []float64{-2.0, -1.0, 0, 1.0, 2.0}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, }, } xr, yr, yar := c.getRanges() assert.Equal(-2.0, xr.Min) assert.Equal(2.0, xr.Max) assert.Equal(-5.0, yr.Min) assert.Equal(5.0, yr.Max) assert.True(yar.IsZero(), yar.String()) } func TestChartGetBackgroundStyle(t *testing.T) { assert := assert.New(t) c := Chart{ Background: Style{ FillColor: drawing.ColorBlack, }, } bs := c.getBackgroundStyle() assert.Equal(bs.FillColor.String(), drawing.ColorBlack.String()) } func TestChartGetCanvasStyle(t *testing.T) { assert := assert.New(t) c := Chart{ Canvas: Style{ FillColor: drawing.ColorBlack, }, } bs := c.getCanvasStyle() assert.Equal(bs.FillColor.String(), drawing.ColorBlack.String()) } func TestChartGetDefaultCanvasBox(t *testing.T) { assert := assert.New(t) c := Chart{} canvasBoxDefault := c.getDefaultCanvasBox() assert.False(canvasBoxDefault.IsZero()) assert.Equal(DefaultBackgroundPadding.Top, canvasBoxDefault.Top) assert.Equal(DefaultBackgroundPadding.Left, canvasBoxDefault.Left) assert.Equal(c.GetWidth()-DefaultBackgroundPadding.Right, canvasBoxDefault.Right) assert.Equal(c.GetHeight()-DefaultBackgroundPadding.Bottom, canvasBoxDefault.Bottom) custom := Chart{ Background: Style{ Padding: Box{ Top: DefaultBackgroundPadding.Top + 1, Left: DefaultBackgroundPadding.Left + 1, Right: DefaultBackgroundPadding.Right + 1, Bottom: DefaultBackgroundPadding.Bottom + 1, }, }, } canvasBoxCustom := custom.getDefaultCanvasBox() assert.False(canvasBoxCustom.IsZero()) assert.Equal(DefaultBackgroundPadding.Top+1, canvasBoxCustom.Top) assert.Equal(DefaultBackgroundPadding.Left+1, canvasBoxCustom.Left) assert.Equal(c.GetWidth()-(DefaultBackgroundPadding.Right+1), canvasBoxCustom.Right) assert.Equal(c.GetHeight()-(DefaultBackgroundPadding.Bottom+1), canvasBoxCustom.Bottom) } func TestChartGetValueFormatters(t *testing.T) { assert := assert.New(t) c := Chart{ Series: []Series{ ContinuousSeries{ XValues: []float64{-2.0, -1.0, 0, 1.0, 2.0}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, ContinuousSeries{ XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{-2.1, -1.0, 0, 1.0, 2.0}, }, ContinuousSeries{ YAxis: YAxisSecondary, XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0}, YValues: []float64{10.0, 11.0, 12.0, 13.0, 14.0}, }, }, } dxf, dyf, dyaf := c.getValueFormatters() assert.NotNil(dxf) assert.NotNil(dyf) assert.NotNil(dyaf) } func TestChartHasAxes(t *testing.T) { assert := assert.New(t) assert.False(Chart{}.hasAxes()) x := Chart{ XAxis: XAxis{ Style: Style{ Show: true, }, }, } assert.True(x.hasAxes()) y := Chart{ YAxis: YAxis{ Style: Style{ Show: true, }, }, } assert.True(y.hasAxes()) ya := Chart{ YAxisSecondary: YAxis{ Style: Style{ Show: true, }, }, } assert.True(ya.hasAxes()) } func TestChartGetAxesTicks(t *testing.T) { assert := assert.New(t) r, err := PNG(1024, 1024) assert.Nil(err) c := Chart{ XAxis: XAxis{ Style: Style{Show: true}, Range: Range{Min: 9.8, Max: 19.8}, }, YAxis: YAxis{ Style: Style{Show: true}, Range: Range{Min: 9.9, Max: 19.9}, }, YAxisSecondary: YAxis{ Style: Style{Show: true}, Range: Range{Min: 9.7, Max: 19.7}, }, } xr, yr, yar := c.getRanges() xt, yt, yat := c.getAxesTicks(r, xr, yr, yar, FloatValueFormatter, FloatValueFormatter, FloatValueFormatter) assert.NotEmpty(xt) assert.NotEmpty(yt) assert.NotEmpty(yat) } func TestChartSingleSeries(t *testing.T) { assert := assert.New(t) now := time.Now() c := Chart{ Title: "Hello!", Width: 1024, Height: 400, YAxis: YAxis{ Range: Range{ Min: 0.0, Max: 4.0, }, }, Series: []Series{ TimeSeries{ Name: "goog", XValues: []time.Time{now.AddDate(0, 0, -3), now.AddDate(0, 0, -2), now.AddDate(0, 0, -1)}, YValues: []float64{1.0, 2.0, 3.0}, }, }, } buffer := bytes.NewBuffer([]byte{}) c.Render(PNG, buffer) assert.NotEmpty(buffer.Bytes()) } func TestChartRegressionBadRanges(t *testing.T) { assert := assert.New(t) c := Chart{ Series: []Series{ ContinuousSeries{ XValues: []float64{math.Inf(1), math.Inf(1), math.Inf(1), math.Inf(1), math.Inf(1)}, YValues: []float64{1.0, 2.0, 3.0, 4.0, 4.5}, }, }, } buffer := bytes.NewBuffer([]byte{}) c.Render(PNG, buffer) assert.True(true, "Render needs to finish.") } func TestChartRegressionBadRangesByUser(t *testing.T) { assert := assert.New(t) c := Chart{ YAxis: YAxis{ Range: Range{ Min: math.Inf(-1), Max: math.Inf(1), // this could really happen? eh. }, }, Series: []Series{ ContinuousSeries{ XValues: Seq(1.0, 10.0), YValues: Seq(1.0, 10.0), }, }, } buffer := bytes.NewBuffer([]byte{}) c.Render(PNG, buffer) assert.True(true, "Render needs to finish.") }