[Bug Fix] Fix transition issue in DynamicContainer (#706)

Author: Kyle-Ye

Example/OpenSwiftUIUITests/View/DynamicViewContent/ForEachUITests.swift

@@ -137,4 +137,34 @@ struct ForEachUITests {
         }
         openSwiftUIAssertSnapshot(of: ContentView())
     }
+
+    @Test(
+        .bug(
+            "https://github.com/OpenSwiftUIProject/OpenSwiftUI/issues/655",
+            id: 655
+        )
+    )
+    func transitionAnimation() {
+        struct ContentView: AnimationTestView {
+            nonisolated static var model: AnimationTestModel {
+                AnimationTestModel(duration: 2.0, count: 4)
+            }
+            @State private var items = [6]
+
+            var body: some View {
+                VStack(spacing: 10) {
+                    ForEach(items, id: \.self) { item in
+                        Color.blue.opacity(Double(item) / 6.0)
+                            .frame(height: 50)
+                            .transition(.slide)
+                    }
+                }
+                .animation(.easeInOut(duration: Self.model.duration), value: items)
+                .onAppear {
+                    items.removeAll { $0 == 6 }
+                }
+            }
+        }
+        openSwiftUIAssertAnimationSnapshot(of: ContentView())
+    }
 }

Sources/OpenSwiftUICore/Animation/Transition/MoveTransition.swift

@@ -53,11 +53,11 @@ public struct MoveTransition: Transition {
     }
 
     public func _makeContentTransition(transition: inout _Transition_ContentTransition) {
-        guard case let .effects(style, size) = transition.operation else {
+        guard case let .effects(_, size) = transition.operation else {
             transition.result = .bool(true)
             return
         }
-        let effectiveSize  = edge.translationOffset(for: size)
+        let effectiveSize = edge.translationOffset(for: size)
         let effect = ContentTransition.Effect(.translation(effectiveSize))
         transition.result = .effects([effect])
     }

Sources/OpenSwiftUICore/Layout/Dynamic/DynamicLayoutView.swift

@@ -226,6 +226,7 @@ struct DynamicLayoutViewAdaptor: DynamicContainerAdaptor {
         var containerID = DynamicContainerID(uniqueId: uniqueId, viewIndex: 0)
         let outputs = item.elements.makeAllElements(inputs: inputs) { elementInputs, body in
             var elementInputs = elementInputs
+            containerInputs(&elementInputs)
             if elementInputs.needsGeometry {
                 let childGeometry = Attribute(
                     DynamicLayoutViewChildGeometry(