Charts I: components 101-120

area_chart_test.go

@@ -0,0 +1,54 @@
+package mujica
+
+import (
+	"math"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+)
+
+func TestAreaBands(t *testing.T) {
+	series := []ChartSeries{{Name: "a", Values: []float64{1, math.NaN(), 3}}, {Name: "b", Values: []float64{2, 2, 2}}}
+	none := func(string) bool { return false }
+	st := areaBands(series, none, true, 10)
+	if st[0][0][0] != 11 || st[1][1][0] != 11 || st[0][1][0] != 13 || !math.IsNaN(st[0][0][1]) || st[0][1][1] != 12 {
+		t.Fatalf("stacked %v", st)
+	}
+	hideA := func(s string) bool { return s == "a" }
+	st = areaBands(series, hideA, true, 0)
+	if st[0][1][2] != 2 || st[1][1][2] != 0 {
+		t.Fatalf("hidden series still stacked: %v", st)
+	}
+	flat := areaBands(series, none, false, -1)
+	if flat[0][0][2] != 3 || flat[1][0][2] != -1 || flat[1][1][2] != -1 {
+		t.Fatalf("baseline %v", flat)
+	}
+}
+
+func TestAreaChartStackedReadout(t *testing.T) {
+	h := &chartHarness{build: func(c *ui.Context) ChartResult {
+		return AreaChart(c, lineSeries(), AreaChartOptions{Frame: ChartFrame{Label: "Nave"}, Stacked: true, Baseline: 1})
+	}}
+	tt := ui.NewTester(h.view, 520, 420)
+	tabTo(t, tt, "Nave")
+	tt.Key(0, ui.KeyRight)
+	if got := chartReadout(tt); got != "0 · Pews 3 · Candles 5" {
+		t.Fatalf("readout shows the series values, not the stack: %q", got)
+	}
+	b := h.res.Element.Bounds()
+	tt.Move(b.X+52+(b.W-64)*0.5, b.Y+b.H/2)
+	if got := chartReadout(tt); got != "2 · Pews no value · Candles 6" || h.res.Point != 2 {
+		t.Fatalf("hover %q", got)
+	}
+}
+
+func TestAreaChartSnapshot(t *testing.T) {
+	snapshot(t, "area_chart", 520, 340, func(c *ui.Context) {
+		ui.Column(c).Padding(16).Children(func() {
+			AreaChart(c, []ChartSeries{
+				{Name: "Matins", Values: []float64{3, 4, 6, 5, 7, 8}},
+				{Name: "Vespers", Values: []float64{2, 3, 2, 4, 3, 5}},
+			}, AreaChartOptions{Frame: ChartFrame{Label: "Attendance"}, Stacked: true})
+		})
+	})
+}