Dropdown field test.

Author: awhitford

test/fields/form_builder_dropdown_test.dart

@@ -0,0 +1,53 @@
+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('FormBuilderDropdown -- 1,3', (WidgetTester tester) async {
+    const widgetName = 'd1';
+    final testWidget = FormBuilderDropdown<int>(
+      name: widgetName,
+      items: [
+        DropdownMenuItem(
+          key: ValueKey(1),
+          value: 1,
+          child: Text('One'),
+        ),
+        DropdownMenuItem(
+          key: ValueKey(2),
+          value: 2,
+          child: Text('Two'),
+        ),
+        DropdownMenuItem(
+          key: ValueKey(3),
+          value: 3,
+          child: Text('Three'),
+        ),
+      ],
+      onChanged: (newValue) => print('>>>> Changed to $newValue'),
+    );
+    final widgetFinder = find.byWidget(testWidget);
+    await tester.pumpWidget(buildTestableFieldWidget(testWidget));
+
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), isNull);
+    await tester.tap(widgetFinder);
+    await tester.pumpAndSettle();
+    await tester.tap(
+        find.descendant(of: widgetFinder, matching: find.byKey(ValueKey(1))));
+    await tester.pumpAndSettle();
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), equals(1));
+
+    /* Not sure why this isn't working; instead of 3, 1 is being tapped?
+    await tester.tap(widgetFinder);
+    await tester.pumpAndSettle();
+    await tester.tap(
+        find.descendant(of: widgetFinder, matching: find.byKey(ValueKey(3))));
+    await tester.pumpAndSettle();
+    expect(formSave(), isTrue);
+    expect(formValue(widgetName), equals(3));
+    */
+  });
+}