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// Copyright 2015 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 'package:flutter_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
import 'package:test/test.dart';
final Key blockKey = new Key('test');
void main() {
test('Cannot scroll a non-overflowing block', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(
new Block(
key: blockKey,
children: <Widget>[
new Container(
height: 200.0, // less than 600, the height of the test area
child: new Text('Hello')
)
]
)
);
Point middleOfContainer = tester.getCenter(tester.findText('Hello'));
Point target = tester.getCenter(tester.findElementByKey(blockKey));
TestGesture gesture = tester.startGesture(target);
gesture.moveBy(const Offset(0.0, -10.0));
tester.pump(const Duration(milliseconds: 1));
expect(tester.getCenter(tester.findText('Hello')) == middleOfContainer, isTrue);
gesture.up();
});
});
test('Can scroll an overflowing block', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(
new Block(
key: blockKey,
children: <Widget>[
new Container(
height: 2000.0, // more than 600, the height of the test area
child: new Text('Hello')
)
]
)
);
Point middleOfContainer = tester.getCenter(tester.findText('Hello'));
expect(middleOfContainer.x, equals(400.0));
expect(middleOfContainer.y, equals(1000.0));
Point target = tester.getCenter(tester.findElementByKey(blockKey));
TestGesture gesture = tester.startGesture(target);
gesture.moveBy(const Offset(0.0, -10.0));
tester.pump(); // redo layout
expect(tester.getCenter(tester.findText('Hello')), isNot(equals(middleOfContainer)));
gesture.up();
});
});
test('Scroll anchor', () {
testWidgets((WidgetTester tester) {
int first = 0;
int second = 0;
Widget buildBlock(ViewportAnchor scrollAnchor) {
return new Block(
key: new UniqueKey(),
scrollAnchor: scrollAnchor,
children: <Widget>[
new GestureDetector(
onTap: () { ++first; },
child: new Container(
height: 2000.0, // more than 600, the height of the test area
decoration: new BoxDecoration(
backgroundColor: new Color(0xFF00FF00)
)
)
),
new GestureDetector(
onTap: () { ++second; },
child: new Container(
height: 2000.0, // more than 600, the height of the test area
decoration: new BoxDecoration(
backgroundColor: new Color(0xFF0000FF)
)
)
)
]
);
}
tester.pumpWidget(buildBlock(ViewportAnchor.end));
Point target = const Point(200.0, 200.0);
tester.tapAt(target);
expect(first, equals(0));
expect(second, equals(1));
tester.pumpWidget(buildBlock(ViewportAnchor.start));
tester.tapAt(target);
expect(first, equals(1));
expect(second, equals(1));
});
});
}