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// Copyright 2016 The Chromium 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 'dart:math' as math;
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter_gallery/gallery/demos.dart';
import 'package:flutter_gallery/gallery/app.dart' show GalleryApp;
// This title is visible on the home and demo category pages. It's
// not visible when the demos are running.
const String kGalleryTitle = 'Flutter gallery';
// All of the classes printed by debugDump etc, must have toString()
// values approved by verityToStringOutput().
int toStringErrors = 0;
// There are 3 places where the Gallery demos are traversed.
// 1- In widget tests such as examples/flutter_gallery/test/smoke_test.dart
// 2- In driver tests such as examples/flutter_gallery/test_driver/transitions_perf_test.dart
// 3- In on-device instrumentation tests such as examples/flutter_gallery/test/live_smoketest.dart
//
// If you change navigation behavior in the Gallery or in the framework, make
// sure all 3 are covered.
void reportToStringError(String name, String route, int lineNumber, List<String> lines, String message) {
// If you're on line 12, then it has index 11.
// If you want 1 line before and 1 line after, then you want lines with index 10, 11, and 12.
// That's (lineNumber-1)-margin .. (lineNumber-1)+margin, or lineNumber-(margin+1) .. lineNumber+(margin-1)
const int margin = 5;
final int firstLine = math.max(0, lineNumber - margin);
final int lastLine = math.min(lines.length, lineNumber + margin);
print('$name : $route : line $lineNumber of ${lines.length} : $message; nearby lines were:\n ${lines.sublist(firstLine, lastLine).join("\n ")}');
toStringErrors += 1;
}
void verifyToStringOutput(String name, String route, String testString) {
int lineNumber = 0;
final List<String> lines = testString.split('\n');
if (!testString.endsWith('\n'))
reportToStringError(name, route, lines.length, lines, 'does not end with a line feed');
for (String line in lines) {
lineNumber += 1;
if (line == '' && lineNumber != lines.length) {
reportToStringError(name, route, lineNumber, lines, 'found empty line');
} else if (line.contains('Instance of ')) {
reportToStringError(name, route, lineNumber, lines, 'found a class that does not have its own toString');
} else if (line.endsWith(' ')) {
reportToStringError(name, route, lineNumber, lines, 'found a line with trailing whitespace');
}
}
}
Future<void> smokeDemo(WidgetTester tester, GalleryDemo demo) async {
// Don't use pumpUntilNoTransientCallbacks in this function, because some of
// the smoketests have infinitely-running animations (e.g. the progress
// indicators demo).
await tester.tap(find.text(demo.title));
await tester.pump(); // Launch the demo.
await tester.pump(const Duration(milliseconds: 400)); // Wait until the demo has opened.
expect(find.text(kGalleryTitle), findsNothing);
// Leave the demo on the screen briefly for manual testing.
await tester.pump(const Duration(milliseconds: 400));
// Scroll the demo around a bit.
await tester.flingFrom(const Offset(400.0, 300.0), const Offset(-100.0, 0.0), 500.0);
await tester.flingFrom(const Offset(400.0, 300.0), const Offset(0.0, -100.0), 500.0);
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 400));
// Verify that the dumps are pretty.
final String routeName = demo.routeName;
verifyToStringOutput('debugDumpApp', routeName, WidgetsBinding.instance.renderViewElement.toStringDeep());
verifyToStringOutput('debugDumpRenderTree', routeName, RendererBinding.instance?.renderView?.toStringDeep());
verifyToStringOutput('debugDumpLayerTree', routeName, RendererBinding.instance?.renderView?.debugLayer?.toStringDeep());
// Scroll the demo around a bit more.
await tester.flingFrom(const Offset(400.0, 300.0), const Offset(0.0, 400.0), 1000.0);
await tester.pump();
await tester.pump(const Duration(milliseconds: 400));
await tester.flingFrom(const Offset(400.0, 300.0), const Offset(-200.0, 0.0), 500.0);
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 400));
await tester.flingFrom(const Offset(400.0, 300.0), const Offset(100.0, 0.0), 500.0);
await tester.pump();
await tester.pump(const Duration(milliseconds: 400));
// Go back
await tester.pageBack();
await tester.pumpAndSettle();
await tester.pump(); // Start the pop "back" operation.
await tester.pump(); // Complete the willPop() Future.
await tester.pump(const Duration(milliseconds: 400)); // Wait until it has finished.
}
Future<void> smokeOptionsPage(WidgetTester tester) async {
final Finder showOptionsPageButton = find.byTooltip('Toggle options page');
// Show the options page
await tester.tap(showOptionsPageButton);
await tester.pumpAndSettle();
// Switch to the dark theme: first menu button, choose 'Dark'
await tester.tap(find.byIcon(Icons.arrow_drop_down).first);
await tester.pumpAndSettle();
await tester.tap(find.text('Dark'));
await tester.pumpAndSettle();
// Switch back to system theme setting: first menu button, choose 'System Default'
await tester.tap(find.byIcon(Icons.arrow_drop_down).first);
await tester.pumpAndSettle();
await tester.tap(find.text('System Default').at(1));
await tester.pumpAndSettle();
// Switch text direction: first switch
await tester.tap(find.byType(Switch).first);
await tester.pumpAndSettle();
// Switch back to system text direction: first switch control again
await tester.tap(find.byType(Switch).first);
await tester.pumpAndSettle();
// Scroll the 'Send feedback' item into view
await tester.drag(find.text('Theme'), const Offset(0.0, -1000.0));
await tester.pumpAndSettle();
await tester.tap(find.text('Send feedback'));
await tester.pumpAndSettle();
// Close the options page
expect(showOptionsPageButton, findsOneWidget);
await tester.tap(showOptionsPageButton);
await tester.pumpAndSettle();
}
Future<void> smokeGallery(WidgetTester tester) async {
bool sendFeedbackButtonPressed = false;
await tester.pumpWidget(
GalleryApp(
testMode: true,
onSendFeedback: () {
sendFeedbackButtonPressed = true; // see smokeOptionsPage()
},
),
);
await tester.pump(); // see https://github.com/flutter/flutter/issues/1865
await tester.pump(); // triggers a frame
expect(find.text(kGalleryTitle), findsOneWidget);
for (GalleryDemoCategory category in kAllGalleryDemoCategories) {
await Scrollable.ensureVisible(tester.element(find.text(category.name)), alignment: 0.5);
await tester.tap(find.text(category.name));
await tester.pumpAndSettle();
for (GalleryDemo demo in kGalleryCategoryToDemos[category]) {
await Scrollable.ensureVisible(tester.element(find.text(demo.title)), alignment: 0.0);
await smokeDemo(tester, demo);
tester.binding.debugAssertNoTransientCallbacks('A transient callback was still active after running $demo');
}
await tester.pageBack();
await tester.pumpAndSettle();
}
expect(toStringErrors, 0);
await smokeOptionsPage(tester);
expect(sendFeedbackButtonPressed, true);
}
void main() {
testWidgets('Flutter Gallery app smoke test', smokeGallery);
testWidgets('Flutter Gallery app smoke test with semantics', (WidgetTester tester) async {
RendererBinding.instance.setSemanticsEnabled(true);
await smokeGallery(tester);
RendererBinding.instance.setSemanticsEnabled(false);
});
}