Add TestApp

Author: Kyle-Ye

Sources/OpenSwiftUI/AppStructure/AppOrganization/internal/TestApp.swift

@@ -0,0 +1,46 @@
+//
+//  TestApp.swift
+//  OpenSwiftUI
+//
+//  Created by Kyle on 2024/1/9.
+//  Lastest Version: iOS 15.5
+//  Status: WIP
+//  ID: A519B5B95CA8FF4E3445832668F0B2D2
+
+public struct _TestApp {
+    public init() {
+        fatalError("TODO")
+    }
+    public func run() -> Never {
+        fatalError("TODO")
+    }
+}
+
+extension _TestApp {
+    struct RootView: View {
+        @State
+        var state: StateType
+        
+        init() {
+            fatalError("TODO")
+        }
+        
+        var body: some View {
+            state.testView
+            fatalError("TODO")
+        }
+    }
+    
+}
+
+extension _TestApp.RootView {
+    struct StateType {
+        var id: Int
+        var testView: AnyView
+        
+        mutating func setTestView<V: View>(_ view: V) {
+            id += 1
+            testView = AnyView(view.testID(id))
+        }
+    }
+}