WIP components (as built)

reorder_transition_test.go

@@ -0,0 +1,80 @@
+package mujica
+
+import (
+	"math"
+	"testing"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+)
+
+func TestReorderTransitionSlides(t *testing.T) {
+	keys := []string{"a", "b", "c"}
+	tt, n := motionFrames(func(c *ui.Context) {
+		ReorderTransition(c, keys, ReorderTransitionOptions{Gap: 4}, func(k string) {
+			ui.Text(c, "Item "+k).Padding(8)
+		})
+	}, 300, 200)
+	ra, _ := tt.Find("Item a")
+	keys = []string{"c", "b", "a"}
+	before := *n
+	tt.Frame()
+	if *n-before < 3 {
+		t.Fatal("reorder did not animate")
+	}
+	mid, _ := tt.Find("Item a")
+	time.Sleep(260 * time.Millisecond)
+	tt.Frame()
+	end, _ := tt.Find("Item a")
+	if !(mid.Y > ra.Y && mid.Y < end.Y) || motionBusy(tt, n) {
+		t.Fatalf("a moved %v → %v → %v", ra.Y, mid.Y, end.Y)
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("duplicate key did not panic")
+		}
+	}()
+	ui.Render(func(c *ui.Context) {
+		Use(c, Settings{})
+		ReorderTransition(c, []int{1, 1}, ReorderTransitionOptions{}, func(int) {})
+	}, 100, 50, 1)
+}
+
+func TestReorderTransitionSnapshot(t *testing.T) {
+	snapshot(t, "reorder_transition", 300, 140, func(c *ui.Context) {
+		ui.Column(c).Padding(16).Children(func() {
+			ReorderTransition(c, []string{"Sakiko", "Uika", "Mutsumi"}, ReorderTransitionOptions{Gap: 4}, func(k string) {
+				ui.Text(c, k).Padding(4, 8).Background(Tokens(c).Surface).Radius(4)
+			})
+		})
+	})
+}
+
+func TestReorderTransitionInvalidGap(t *testing.T) {
+	for _, gap := range []float32{float32(nanValue()), float32(math.Inf(1))} {
+		func() {
+			defer func() {
+				if recover() == nil {
+					t.Errorf("invalid gap %v accepted", gap)
+				}
+			}()
+			ui.Render(func(c *ui.Context) {
+				Use(c, Settings{})
+				ReorderTransition(c, []int{1}, ReorderTransitionOptions{Gap: gap}, func(int) {})
+			}, 200, 100, 1)
+		}()
+	}
+}
+
+func TestReorderTransitionReducedMotionCancelsExit(t *testing.T) {
+	keys := []string{"a", "b"}
+	tt, n := motionFrames(func(c *ui.Context) {
+		ReorderTransition(c, keys, ReorderTransitionOptions{Duration: 5 * time.Second}, func(k string) { ui.Text(c, k) })
+	}, 300, 150)
+	keys = []string{"b"}
+	tt.Frame()
+	tt.SetPreferences(ui.Preferences{ReduceMotion: true, TextScale: 1})
+	if motionBusy(tt, n) || tt.HasText("a") {
+		t.Fatal("removed item kept animating under reduced motion")
+	}
+}