Fixes TextField hinttext in a11y_assessment (#150007)

b/317131589

dev/a11y_assessments/lib/use_cases/text_field.dart

@@ -32,6 +32,7 @@ class _MainWidget extends StatelessWidget {
         children: <Widget>[
           const TextField(
             key: Key('enabled text field'),
+            maxLines: null,
             decoration: InputDecoration(
               labelText: 'Email',
               suffixText: '@gmail.com',
@@ -40,6 +41,7 @@ class _MainWidget extends StatelessWidget {
           ),
           TextField(
             key: const Key('disabled text field'),
+            maxLines: null,
             decoration: const InputDecoration(
               labelText: 'Email',
               suffixText: '@gmail.com',

dev/a11y_assessments/lib/use_cases/text_field_password.dart

@@ -34,7 +34,6 @@ class _MainWidget extends StatelessWidget {
             key: Key('enabled password'),
             decoration: InputDecoration(
               labelText: 'Password',
-              hintText: 'Enter your password',
             ),
             obscureText: true,
           ),
@@ -42,7 +41,6 @@ class _MainWidget extends StatelessWidget {
             key: Key('disabled password'),
             decoration: InputDecoration(
               labelText: 'Password',
-              hintText: 'Enter your password',
             ),
             enabled: false,
             obscureText: true,

dev/a11y_assessments/test/text_field_password_test.dart

@@ -30,4 +30,24 @@ void main() {
       expect(passwordField.enabled, isFalse);
     }
   });
+
+  testWidgets('text field passwords do not have hint text', (WidgetTester tester) async {
+    await pumpsUseCase(tester, TextFieldPasswordUseCase());
+    expect(find.byType(TextField), findsExactly(2));
+
+    // Test the enabled password
+    {
+      final Finder finder = find.byKey(const Key('enabled password'));
+      final TextField textField = tester.widget<TextField>(finder);
+      expect(textField.decoration?.hintText, isNull);
+
+    }
+
+    // Test the disabled password
+    {
+      final Finder finder = find.byKey(const Key('disabled password'));
+      final TextField textField = tester.widget<TextField>(finder);
+      expect(textField.decoration?.hintText, isNull);
+    }
+  });
 }

dev/a11y_assessments/test/text_field_test.dart

@@ -30,4 +30,28 @@ void main() {
       expect(textField.enabled, isFalse);
     }
   });
+
+  testWidgets('font size increase does not ellipsize hint text', (WidgetTester tester) async {
+    await pumpsUseCase(tester, TextFieldUseCase());
+    await tester.pumpWidget(MaterialApp(
+      home: MediaQuery.withClampedTextScaling(
+        minScaleFactor: 3,
+        maxScaleFactor: 3,
+        child: Builder(
+          builder: (BuildContext context) {
+            return TextFieldUseCase().build(context);
+          },
+        ),
+      ),
+    ));
+    // Test the enabled text field
+    {
+      final Finder finder = find.byKey(const Key('enabled text field'));
+      await tester.tap(finder);
+      await tester.pumpAndSettle();
+      final Size size = tester.getSize(finder);
+      // Should have a multi-line height.
+      expect(size.height, 280);
+    }
+  });
 }