WIP components (as built)

layout_transition_test.go

@@ -0,0 +1,55 @@
+package mujica
+
+import (
+	"testing"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+)
+
+func TestLayoutTransitionResizes(t *testing.T) {
+	wide := false
+	var w float32
+	tt, n := motionFrames(func(c *ui.Context) {
+		ui.Column(c).AlignItems(ui.Start).Children(func() {
+			box := LayoutTransition(c, LayoutTransitionOptions{Clip: true}, func() {
+				width := float32(100)
+				if wide {
+					width = 300
+				}
+				ui.Box(c).Size(width, 40)
+			})
+			w = box.Bounds().W
+		})
+	}, 400, 120)
+	wide = true
+	before := *n
+	tt.Frame()
+	if *n-before < 3 {
+		t.Fatal("resize did not animate")
+	}
+	time.Sleep(260 * time.Millisecond)
+	tt.Frame()
+	if motionBusy(tt, n) || w != 300 {
+		t.Fatalf("settled width %v", w)
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("negative duration did not panic")
+		}
+	}()
+	ui.Render(func(c *ui.Context) {
+		Use(c, Settings{})
+		LayoutTransition(c, LayoutTransitionOptions{Duration: -1}, nil)
+	}, 100, 50, 1)
+}
+
+func TestLayoutTransitionSnapshot(t *testing.T) {
+	snapshot(t, "layout_transition", 300, 100, func(c *ui.Context) {
+		ui.Column(c).Padding(16).AlignItems(ui.Start).Children(func() {
+			LayoutTransition(c, LayoutTransitionOptions{}, func() {
+				ui.Text(c, "A panel that grows").Padding(12).Background(Tokens(c).Surface).Radius(4)
+			})
+		})
+	})
+}