Radio Group field test.

Author: awhitford

test/fields/form_builder_radio_group_test.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'form_builder_tester.dart';
+
+void main() {
+  testWidgets('FormBuilderRadioGroup -- 1,3', (WidgetTester tester) async {
+    const widgetName = 'rg1';
+    final testWidget = FormBuilderRadioGroup<int>(
+      name: widgetName,
+      options: const [
+        FormBuilderFieldOption(key: ValueKey('1'), value: 1),
+        FormBuilderFieldOption(key: ValueKey('2'), value: 2),
+        FormBuilderFieldOption(key: ValueKey('3'), value: 3),
+      ],
+    );
+    await tester.pumpWidget(buildTestableFieldWidget(testWidget));
+
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), isNull);
+    await tester.tap(find.byKey(ValueKey('1')));
+    await tester.pumpAndSettle();
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), equals(1));
+    await tester.tap(find.byKey(ValueKey('3')));
+    await tester.pumpAndSettle();
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), equals(3));
+  });
+}