Step 1 of 3: Add opt-in for debugCheckHasMaterialLocalizations assertion on TextField (#56090)

packages/flutter/lib/src/material/text_field.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// TODO(Piinks): Remove ignoring deprecated member use analysis
+// when TextField.canAssertMaterialLocalizations parameter is removed.
+// ignore_for_file: deprecated_member_use_from_same_package
+
 import 'dart:ui' as ui show BoxHeightStyle, BoxWidthStyle;
 
 import 'package:flutter/cupertino.dart';
@@ -348,6 +352,7 @@ class TextField extends StatefulWidget {
     this.scrollController,
     this.scrollPhysics,
     this.autofillHints,
+    bool canAssertMaterialLocalizations,
   }) : assert(textAlign != null),
        assert(readOnly != null),
        assert(autofocus != null),
@@ -393,6 +398,7 @@ class TextField extends StatefulWidget {
            selectAll: true,
            paste: true,
          )),
+       canAssertMaterialLocalizations = canAssertMaterialLocalizations ?? false,
        super(key: key);
 
   /// Controls the text being edited.
@@ -724,6 +730,16 @@ class TextField extends StatefulWidget {
   /// {@macro flutter.widgets.editableText.autofillHints}
   final Iterable<String> autofillHints;
 
+  /// Indicates whether [debugCheckHasMaterialLocalizations] can be called
+  /// during build.
+  @Deprecated(
+    'Set canAssertMaterialLocalizations to `true`. This parameter will be '
+    'removed and was introduced to migrate TextField to assert '
+    'debugCheckHasMaterialLocalizations by default. '
+    'This feature was deprecated after v1.18.0.'
+  )
+  final bool canAssertMaterialLocalizations;
+
   @override
   _TextFieldState createState() => _TextFieldState();
 
@@ -964,8 +980,8 @@ class _TextFieldState extends State<TextField> implements TextSelectionGestureDe
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMaterial(context));
-    // TODO(jonahwilliams): uncomment out this check once we have migrated tests.
-    // assert(debugCheckHasMaterialLocalizations(context));
+    if (widget.canAssertMaterialLocalizations)
+      assert(debugCheckHasMaterialLocalizations(context));
     assert(debugCheckHasDirectionality(context));
     assert(
       !(widget.style != null && widget.style.inherit == false &&

packages/flutter/test/widgets/physical_model_test.dart

@@ -55,17 +55,13 @@ void main() {
   testWidgets('PhysicalModel - creates a physical model layer when it needs compositing', (WidgetTester tester) async {
     debugDisableShadows = false;
     await tester.pumpWidget(
-      MediaQuery(
-        data: const MediaQueryData(devicePixelRatio: 1.0),
-        child: Directionality(
-          textDirection: TextDirection.ltr,
-          child: PhysicalModel(
-            shape: BoxShape.rectangle,
-            color: Colors.grey,
-            shadowColor: Colors.red,
-            elevation: 1.0,
-            child: Material(child: TextField(controller: TextEditingController())),
-          ),
+      MaterialApp(
+        home: PhysicalModel(
+          shape: BoxShape.rectangle,
+          color: Colors.grey,
+          shadowColor: Colors.red,
+          elevation: 1.0,
+          child: Material(child: TextField(controller: TextEditingController())),
         ),
       ),
     );