flutter/examples/api/test/material/autocomplete/autocomplete.4_test.dart
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Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

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4.9 KiB
Dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
import 'package:flutter_api_samples/material/autocomplete/autocomplete.4.dart' as example;
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets(
'can search and find options after waiting for fake network delay and debounce delay',
(WidgetTester tester) async {
await tester.pumpWidget(const example.AutocompleteExampleApp());
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.enterText(find.byType(TextFormField), 'a');
await tester.pump(example.fakeAPIDuration);
// No results yet, need to also wait for the debounce duration.
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.pump(example.debounceDuration);
expect(find.text('aardvark'), findsOneWidget);
expect(find.text('bobcat'), findsOneWidget);
expect(find.text('chameleon'), findsOneWidget);
await tester.enterText(find.byType(TextFormField), 'aa');
await tester.pump(example.debounceDuration + example.fakeAPIDuration);
expect(find.text('aardvark'), findsOneWidget);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
},
);
testWidgets('debounce is reset each time a character is entered', (WidgetTester tester) async {
await tester.pumpWidget(const example.AutocompleteExampleApp());
await tester.enterText(find.byType(TextFormField), 'c');
await tester.pump(example.debounceDuration - const Duration(milliseconds: 100));
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.enterText(find.byType(TextFormField), 'ch');
await tester.pump(example.debounceDuration - const Duration(milliseconds: 100));
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.enterText(find.byType(TextFormField), 'cha');
await tester.pump(example.debounceDuration - const Duration(milliseconds: 100));
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.enterText(find.byType(TextFormField), 'cham');
await tester.pump(example.debounceDuration - const Duration(milliseconds: 100));
// Despite the total elapsed time being greater than debounceDuration +
// fakeAPIDuration, the search has not yet completed, because the debounce
// was reset each time text input happened.
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
await tester.enterText(find.byType(TextFormField), 'chame');
await tester.pump(example.debounceDuration + example.fakeAPIDuration);
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsOneWidget);
});
testWidgets('shows an error message for network errors', (WidgetTester tester) async {
await tester.pumpWidget(const example.AutocompleteExampleApp());
await tester.enterText(find.byType(TextFormField), 'chame');
await tester.pump(example.debounceDuration + example.fakeAPIDuration);
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsOneWidget);
InputDecorator inputDecorator = tester.widget(find.byType(InputDecorator));
expect(inputDecorator.decoration.errorText, isNull);
// Turn the network off.
await tester.tap(find.byType(Switch));
await tester.pump();
await tester.enterText(find.byType(TextFormField), 'chamel');
await tester.pump(example.debounceDuration + example.fakeAPIDuration);
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsNothing);
inputDecorator = tester.widget(find.byType(InputDecorator));
expect(inputDecorator.decoration.errorText, isNotNull);
// Turn the network back on.
await tester.tap(find.byType(Switch));
await tester.pump();
await tester.enterText(find.byType(TextFormField), 'chamele');
await tester.pump(example.debounceDuration + example.fakeAPIDuration);
expect(find.text('aardvark'), findsNothing);
expect(find.text('bobcat'), findsNothing);
expect(find.text('chameleon'), findsOneWidget);
inputDecorator = tester.widget(find.byType(InputDecorator));
expect(inputDecorator.decoration.errorText, isNull);
});
}