wip-c2-4

parallel_coordinates_test.go

@@ -0,0 +1,84 @@
+package mujica
+
+import (
+	"math"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+)
+
+var pcAxes = []string{"Age", "Hymns", "Vigils"}
+var pcRows = [][]float64{{20, 3, 9}, {35, 8, 2}, {50, 5, 5}, {65, 1, math.NaN()}}
+var pcNames = []string{"Agnès", "Clare", "Hild", "Bede"}
+
+func TestParallelCoordinatesReadoutAndBrush(t *testing.T) {
+	filters := map[string][2]float64{}
+	values := 0
+	h := &chartHarness{build: func(c *ui.Context) ChartResult {
+		r := ParallelCoordinates(c, &filters, pcAxes, pcRows, ParallelCoordinatesOptions{Frame: ChartFrame{Label: "Monks"}, Names: pcNames})
+		if r.ValueChanged() {
+			values++
+		}
+		return r
+	}}
+	tt := ui.NewTester(h.view, 520, 420)
+	tabTo(t, tt, "Monks")
+	tt.Key(0, ui.KeyEnd)
+	if got := chartReadout(tt); got != "Bede · Age 65 · Hymns 1 · Vigils no value" {
+		t.Fatalf("readout %q", got)
+	}
+	b := h.res.Element.Bounds()
+	plot := ui.Rect{X: b.X + 36, Y: b.Y + 24, W: b.W - 72, H: 240 - 32}
+	// Age runs 20..80 on the first axis: brush 30..55.
+	y := func(v float32) float32 { return plot.Y + plot.H*(1-(v-20)/60) }
+	tt.Press(plot.X, y(55))
+	tt.Move(plot.X, y(40))
+	tt.Move(plot.X, y(30))
+	tt.Release(plot.X, y(30))
+	f, ok := filters["Age"]
+	if !ok || math.Abs(f[0]-30) > 0.5 || math.Abs(f[1]-55) > 0.5 || values != 1 {
+		t.Fatalf("brush %v %v (%d)", f, ok, values)
+	}
+	tt.Key(0, ui.KeyHome)
+	if got := chartReadout(tt); got != "Agnès · Age 20 · Hymns 3 · Vigils 9 · filtered out" {
+		t.Fatalf("filtered readout %q", got)
+	}
+	tt.Press(plot.X, y(45)) // a click on the axis clears it
+	tt.Release(plot.X, y(45))
+	if _, ok := filters["Age"]; ok {
+		t.Fatal("click did not clear the brush")
+	}
+}
+
+func TestParallelCoordinatesHoverAndBad(t *testing.T) {
+	filters := map[string][2]float64{}
+	h := &chartHarness{build: func(c *ui.Context) ChartResult {
+		return ParallelCoordinates(c, &filters, pcAxes, pcRows, ParallelCoordinatesOptions{Frame: ChartFrame{Label: "Monks"}})
+	}}
+	tt := ui.NewTester(h.view, 520, 420)
+	b := h.res.Element.Bounds()
+	plot := ui.Rect{X: b.X + 36, Y: b.Y + 24, W: b.W - 72, H: 240 - 32}
+	// A quarter into the first gap, row 2 (Age 50 of 20..80, Hymns 5 of 0..8) is 0.53 up.
+	tt.Move(plot.X+plot.W/8, plot.Y+plot.H*(1-0.53125))
+	if h.res.Point != 2 {
+		t.Fatalf("hover picked %d", h.res.Point)
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("no panic for a short row")
+		}
+	}()
+	ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		ParallelCoordinates(c, &filters, pcAxes, [][]float64{{1}}, ParallelCoordinatesOptions{Frame: ChartFrame{Label: "x"}})
+	}, 300, 300)
+}
+
+func TestParallelCoordinatesSnapshot(t *testing.T) {
+	snapshot(t, "parallel_coordinates", 520, 320, func(c *ui.Context) {
+		filters := map[string][2]float64{"Hymns": {2, 9}}
+		ui.Column(c).Padding(16).Children(func() {
+			ParallelCoordinates(c, &filters, pcAxes, pcRows, ParallelCoordinatesOptions{Frame: ChartFrame{Label: "Monks"}, Names: pcNames})
+		})
+	})
+}