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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';
import 'test_widgets.dart';
void main() {
test('HomogeneousViewport mount/dismount smoke test', () {
testWidgets((WidgetTester tester) {
List<int> callbackTracker = <int>[];
// the root view is 800x600 in the test environment
// so if our widget is 100 pixels tall, it should fit exactly 6 times.
Widget builder() {
return new FlipWidget(
left: new ScrollableLazyList(
itemBuilder: (BuildContext context, int start, int count) {
List<Widget> result = <Widget>[];
for (int index = start; index < start + count; index += 1) {
callbackTracker.add(index);
result.add(new Container(
key: new ValueKey<int>(index),
height: 100.0,
child: new Text("$index")
));
}
return result;
},
itemExtent: 100.0
),
right: new Text('Not Today')
);
}
tester.pumpWidget(builder());
StatefulElement element = tester.findElement((Element element) => element.widget is FlipWidget);
FlipWidgetState testWidget = element.state;
expect(callbackTracker, equals([0, 1, 2, 3, 4, 5]));
callbackTracker.clear();
testWidget.flip();
tester.pump();
expect(callbackTracker, equals([]));
callbackTracker.clear();
testWidget.flip();
tester.pump();
expect(callbackTracker, equals([0, 1, 2, 3, 4, 5]));
});
});
test('HomogeneousViewport vertical', () {
testWidgets((WidgetTester tester) {
List<int> callbackTracker = <int>[];
// the root view is 800x600 in the test environment
// so if our widget is 200 pixels tall, it should fit exactly 3 times.
// but if we are offset by 300 pixels, there will be 4, numbered 1-4.
ItemListBuilder itemBuilder = (BuildContext context, int start, int count) {
List<Widget> result = <Widget>[];
for (int index = start; index < start + count; index += 1) {
callbackTracker.add(index);
result.add(new Container(
key: new ValueKey<int>(index),
width: 500.0, // this should be ignored
height: 400.0, // should be overridden by itemExtent
child: new Text("$index")
));
}
return result;
};
GlobalKey<ScrollableState<ScrollableLazyList>> scrollableKey = new GlobalKey<ScrollableState<ScrollableLazyList>>();
FlipWidget testWidget = new FlipWidget(
left: new ScrollableLazyList(
key: scrollableKey,
itemBuilder: itemBuilder,
itemExtent: 200.0,
initialScrollOffset: 300.0
),
right: new Text('Not Today')
);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([1, 2, 3, 4]));
callbackTracker.clear();
scrollableKey.currentState.scrollTo(400.0);
// now only 3 should fit, numbered 2-4.
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([2, 3, 4]));
callbackTracker.clear();
});
});
test('HomogeneousViewport horizontal', () {
testWidgets((WidgetTester tester) {
List<int> callbackTracker = <int>[];
// the root view is 800x600 in the test environment
// so if our widget is 200 pixels wide, it should fit exactly 4 times.
// but if we are offset by 300 pixels, there will be 5, numbered 1-5.
ItemListBuilder itemBuilder = (BuildContext context, int start, int count) {
List<Widget> result = <Widget>[];
for (int index = start; index < start + count; index += 1) {
callbackTracker.add(index);
result.add(new Container(
key: new ValueKey<int>(index),
width: 400.0, // this should be overridden by itemExtent
height: 500.0, // this should be ignored
child: new Text("$index")
));
}
return result;
};
GlobalKey<ScrollableState<ScrollableLazyList>> scrollableKey = new GlobalKey<ScrollableState<ScrollableLazyList>>();
FlipWidget testWidget = new FlipWidget(
left: new ScrollableLazyList(
key: scrollableKey,
itemBuilder: itemBuilder,
itemExtent: 200.0,
initialScrollOffset: 300.0,
scrollDirection: Axis.horizontal
),
right: new Text('Not Today')
);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([1, 2, 3, 4, 5]));
callbackTracker.clear();
scrollableKey.currentState.scrollTo(400.0);
// now only 4 should fit, numbered 2-5.
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([2, 3, 4, 5]));
callbackTracker.clear();
});
});
test('ScrollableLazyList 10 items, 2-3 items visible', () {
testWidgets((WidgetTester tester) {
List<int> callbackTracker = <int>[];
// The root view is 800x600 in the test environment and our list
// items are 300 tall. Scrolling should cause two or three items
// to be built.
ItemListBuilder itemBuilder = (BuildContext context, int start, int count) {
List<Widget> result = <Widget>[];
for (int index = start; index < start + count; index += 1) {
callbackTracker.add(index);
result.add(new Text('$index', key: new ValueKey<int>(index)));
}
return result;
};
GlobalKey<ScrollableState<ScrollableLazyList>> scrollableKey = new GlobalKey<ScrollableState<ScrollableLazyList>>();
Widget testWidget = new ScrollableLazyList(
key: scrollableKey,
itemBuilder: itemBuilder,
itemExtent: 300.0,
itemCount: 10
);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([0, 1]));
callbackTracker.clear();
scrollableKey.currentState.scrollTo(150.0);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([0, 1, 2]));
callbackTracker.clear();
scrollableKey.currentState.scrollTo(600.0);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([2, 3]));
callbackTracker.clear();
scrollableKey.currentState.scrollTo(750.0);
tester.pumpWidget(testWidget);
expect(callbackTracker, equals([2, 3, 4]));
callbackTracker.clear();
});
});
}