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41 lines
1.4 KiB
41 lines
1.4 KiB
5 years ago
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// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:infinitelist/main.dart';
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void main() {
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testWidgets('Infinite list smoke test', (tester) async {
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await tester.pumpWidget(MyApp());
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const loadingDuration = Duration(milliseconds: 500);
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// At first, the catalog shows only "..." (loading items).
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expect(find.text('...'), findsWidgets);
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expect(find.text('Color #1'), findsNothing);
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await tester.pump(loadingDuration);
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// After the app has had a chance to load items, it should no longer
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// show "...".
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expect(find.text('...'), findsNothing);
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expect(find.text('Color #1'), findsOneWidget);
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// Flinging up quickly (i.e. scrolling down).
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await tester.fling(find.byType(ListView), Offset(0, -2000), 5000);
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// As we scroll down, we should see more items loading.
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expect(find.text('...'), findsWidgets);
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// The item at the top should no longer be in view.
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expect(find.text('Color #1'), findsNothing);
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// This last part is just giving the app time to complete its "fetch"
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// of new items. Otherwise, the test fails because of outstanding
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// asynchronous callbacks.
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await tester.pump(loadingDuration);
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});
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}
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