WIP charts2 parts 2

chart_brush_test.go

@@ -0,0 +1,123 @@
+package mujica
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+)
+
+type brushHarness struct {
+	value    [2]float64
+	changes  int
+	disabled bool
+	el       *ui.Element
+}
+
+func (h *brushHarness) view(c *ui.Context) {
+	Use(c, Settings{Mode: Light})
+	ui.Column(c).Padding(10).Width(420).Children(func() {
+		r := ChartBrush(c, &h.value, ChartBrushOptions{Label: "Months", Min: 0, Max: 100, Step: 1, Disabled: h.disabled})
+		h.el = r.Element
+		if r.Changed() {
+			h.changes++
+		}
+	})
+}
+
+func TestChartBrushKeyboard(t *testing.T) {
+	h := &brushHarness{value: [2]float64{20, 40}}
+	tt := ui.NewTester(h.view, 460, 200)
+	tabTo(t, tt, "Months: 20 to 40")
+	tt.Key(0, ui.KeyRight)
+	tt.Key(0, ui.KeyRight)
+	if h.value != [2]float64{22, 42} || h.changes != 2 {
+		t.Fatalf("window moved to %v (%d)", h.value, h.changes)
+	}
+	tt.Key(0, ui.KeyTab)
+	if !tt.Focused("Range end 42") {
+		t.Fatal("Tab did not reach the end handle")
+	}
+	tt.Key(0, ui.KeyPageUp)
+	tt.Key(0, ui.KeyEnd)
+	if h.value != [2]float64{22, 100} {
+		t.Fatalf("end handle: %v", h.value)
+	}
+	tt.Key(ui.Shift, ui.KeyTab)
+	tt.Key(ui.Shift, ui.KeyTab)
+	tt.Key(0, ui.KeyEnd) // the start cannot pass the end
+	if h.value != [2]float64{99, 100} || !tt.HasText("99 – 100") {
+		t.Fatalf("start to End: %v %q", h.value, tt.Texts())
+	}
+}
+
+func TestChartBrushDrag(t *testing.T) {
+	h := &brushHarness{value: [2]float64{20, 40}}
+	tt := ui.NewTester(h.view, 460, 200)
+	b := h.el.Bounds()
+	x := func(v float32) float32 { return b.X + 400*v/100 }
+	y := b.Y + 24
+	tt.Press(x(30), y) // inside the window
+	tt.Move(x(40), y)
+	tt.Move(x(50), y)
+	tt.Release(x(50), y)
+	if h.value != [2]float64{40, 60} {
+		t.Fatalf("window drag: %v", h.value)
+	}
+	tt.Press(x(60), y) // the end handle
+	tt.Move(x(70), y)
+	tt.Move(x(75), y)
+	tt.Release(x(75), y)
+	if h.value != [2]float64{40, 75} {
+		t.Fatalf("end drag: %v", h.value)
+	}
+	tt.Press(x(85), y) // outside: a new range
+	tt.Move(x(90), y)
+	tt.Move(x(95), y)
+	tt.Release(x(95), y)
+	if h.value != [2]float64{85, 95} {
+		t.Fatalf("new range: %v", h.value)
+	}
+}
+
+func TestChartBrushDisabledAndBad(t *testing.T) {
+	h := &brushHarness{value: [2]float64{20, 40}, disabled: true}
+	tt := ui.NewTester(h.view, 460, 200)
+	b := h.el.Bounds()
+	tt.Press(b.X+120, b.Y+24)
+	tt.Move(b.X+200, b.Y+24)
+	tt.Release(b.X+200, b.Y+24)
+	for range 3 {
+		tt.Key(0, ui.KeyTab)
+		tt.Key(0, ui.KeyRight)
+	}
+	if h.value != [2]float64{20, 40} || h.changes != 0 {
+		t.Fatalf("disabled brush moved: %v", h.value)
+	}
+	for _, v := range [][2]float64{{50, 40}, {-1, 10}} {
+		func() {
+			defer func() {
+				if recover() == nil {
+					t.Errorf("%v: no panic", v)
+				}
+			}()
+			ui.NewTester(func(c *ui.Context) {
+				Use(c, Settings{})
+				ChartBrush(c, &v, ChartBrushOptions{Label: "x", Max: 100})
+			}, 300, 100)
+		}()
+	}
+}
+
+func TestChartBrushSnapshot(t *testing.T) {
+	vals := make([]float64, 60)
+	for i := range vals {
+		vals[i] = float64((i*7)%13) + float64(i)/6
+	}
+	snapshot(t, "chart_brush", 460, 110, func(c *ui.Context) {
+		v := [2]float64{18, 42}
+		ui.Column(c).Padding(16).Children(func() {
+			ChartBrush(c, &v, ChartBrushOptions{Label: "Months", Min: 0, Max: 59, Step: 1, Values: vals, Format: func(f float64) string { return fmt.Sprintf("week %.0f", f) }})
+		})
+	})
+}