feat: add CustomSemantics widget

packages/flutter_availability/lib/src/ui/widgets/semantic_widget.dart

@@ -0,0 +1,62 @@
+import "dart:io";
+
+import "package:flutter/foundation.dart";
+import "package:flutter/material.dart";
+
+/// A wrapper that wraps a widget with a [Semantics] widget.
+/// This is used for testing purposes to add a unique identifier to a widget.
+/// Use this element for all widgets that have something that should be
+/// selectable in tests (buttons, textfields, dynamic texts)
+/// The [identifier] should be unique for the specific screen.
+/// To make sure the accessibility ID is set for all platforms this widget
+/// uses a label for android when it is not a textfield.
+/// [container] is set to true to make sure the widget is always its own
+/// accessibility element.
+/// [excludeSemantics] is set to false to make sure that children of this widget
+/// can still be interacted with.
+/// [isTextField] can be set to true because for textField the
+/// [excludeSemantics] modifies the behavior of the textfield in e2e tests.
+class CustomSemantics extends StatelessWidget {
+  /// Creates a [CustomSemantics] widget.
+  /// The [identifier] should be unique for the specific screen.
+  /// [isTextField] if this widget is a TextField or TextFormField
+  /// [excludeSemantics] if the [Semantics] widget should exclude the semantics
+  /// of its children. This is done by default if it not a textfield.
+  const CustomSemantics({
+    required this.identifier,
+    required this.child,
+    this.excludeSemantics = false,
+    this.isTextField = false,
+    super.key,
+  });
+
+  /// The widget that should be wrapped with a [Semantics] widget.
+  final Widget child;
+
+  /// Identifier for the widget that should be unique for the specific screen.
+  final String? identifier;
+
+  /// If the [Semantics] widget should exclude the semantics of its children.
+  final bool excludeSemantics;
+
+  /// If the widget is a textfield, the [child] can't be excluded. This is
+  /// because otherwise the textfield doesn't work in e2e tests with Appium.
+  final bool isTextField;
+
+  @override
+  Widget build(BuildContext context) {
+    var isAndroid = !kIsWeb && Platform.isAndroid;
+
+    var excludeSemantics = (!isTextField && isAndroid) || this.excludeSemantics;
+
+    var label = !isTextField && isAndroid ? identifier : null;
+
+    return Semantics(
+      excludeSemantics: excludeSemantics,
+      container: true,
+      label: label,
+      identifier: identifier,
+      child: child,
+    );
+  }
+}