flutter/packages/unit/test/widget/stack_test.dart

187 lines
5.6 KiB
Dart

import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:test/test.dart';
import 'widget_tester.dart';
void main() {
test('Can construct an empty Stack', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(new Stack(<Widget>[]));
});
});
test('Can construct an empty Centered Stack', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(new Center(child: new Stack(<Widget>[])));
});
});
test('Can change position data', () {
testWidgets((WidgetTester tester) {
Key key = new Key('container');
tester.pumpWidget(
new Stack(<Widget>[
new Positioned(
left: 10.0,
child: new Container(
key: key,
width: 10.0,
height: 10.0
)
)
])
);
Element container;
StackParentData parentData;
container = tester.findElementByKey(key);
parentData = container.renderObject.parentData;
expect(parentData.top, isNull);
expect(parentData.right, isNull);
expect(parentData.bottom, isNull);
expect(parentData.left, equals(10.0));
tester.pumpWidget(
new Stack(<Widget>[
new Positioned(
right: 10.0,
child: new Container(
key: key,
width: 10.0,
height: 10.0
)
)
])
);
container = tester.findElementByKey(key);
parentData = container.renderObject.parentData;
expect(parentData.top, isNull);
expect(parentData.right, equals(10.0));
expect(parentData.bottom, isNull);
expect(parentData.left, isNull);
});
});
test('Can remove parent data', () {
testWidgets((WidgetTester tester) {
Key key = new Key('container');
Container container = new Container(key: key, width: 10.0, height: 10.0);
tester.pumpWidget(new Stack(<Widget>[ new Positioned(left: 10.0, child: container) ]));
Element containerElement = tester.findElementByKey(key);
StackParentData parentData;
parentData = containerElement.renderObject.parentData;
expect(parentData.top, isNull);
expect(parentData.right, isNull);
expect(parentData.bottom, isNull);
expect(parentData.left, equals(10.0));
tester.pumpWidget(new Stack(<Widget>[ container ]));
containerElement = tester.findElementByKey(key);
parentData = containerElement.renderObject.parentData;
expect(parentData.top, isNull);
expect(parentData.right, isNull);
expect(parentData.bottom, isNull);
expect(parentData.left, isNull);
});
});
test('Can align non-positioned children', () {
testWidgets((WidgetTester tester) {
Key child0Key = new Key('child0');
Key child1Key = new Key('child1');
tester.pumpWidget(
new Center(
child: new Stack(<Widget>[
new Container(key: child0Key, width: 20.0, height: 20.0),
new Container(key: child1Key, width: 10.0, height: 10.0)
],
alignment: const FractionalOffset(0.5, 0.5)
)
)
);
Element child0 = tester.findElementByKey(child0Key);
final StackParentData child0RenderObjectParentData = child0.renderObject.parentData;
expect(child0RenderObjectParentData.position, equals(const Point(0.0, 0.0)));
Element child1 = tester.findElementByKey(child1Key);
final StackParentData child1RenderObjectParentData = child1.renderObject.parentData;
expect(child1RenderObjectParentData.position, equals(const Point(5.0, 5.0)));
});
});
test('Can construct an empty IndexedStack', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(new IndexedStack(<Widget>[]));
});
});
test('Can construct an empty Centered IndexedStack', () {
testWidgets((WidgetTester tester) {
tester.pumpWidget(new Center(child: new IndexedStack(<Widget>[])));
});
});
test('Can construct an IndexedStack', () {
testWidgets((WidgetTester tester) {
int itemCount = 3;
List<int> itemsPainted;
Widget buildFrame(int index) {
itemsPainted = <int>[];
List<Widget> items = new List<Widget>.generate(itemCount, (i) {
return new CustomPaint(child: new Text('$i'), onPaint: (_, __) { itemsPainted.add(i); });
});
return new Center(child: new IndexedStack(items, index: index));
}
tester.pumpWidget(buildFrame(0));
expect(tester.findText('0'), isNotNull);
expect(tester.findText('1'), isNotNull);
expect(tester.findText('2'), isNotNull);
expect(itemsPainted, equals([0]));
tester.pumpWidget(buildFrame(1));
expect(itemsPainted, equals([1]));
tester.pumpWidget(buildFrame(2));
expect(itemsPainted, equals([2]));
});
});
test('Can hit test an IndexedStack', () {
testWidgets((WidgetTester tester) {
Key key = new Key('indexedStack');
int itemCount = 3;
List<int> itemsTapped;
Widget buildFrame(int index) {
itemsTapped = <int>[];
List<Widget> items = new List<Widget>.generate(itemCount, (i) {
return new GestureDetector(child: new Text('$i'), onTap: () { itemsTapped.add(i); });
});
return new Center(child: new IndexedStack(items, key: key, index: index));
}
tester.pumpWidget(buildFrame(0));
expect(itemsTapped, isEmpty);
tester.tap(tester.findElementByKey(key));
expect(itemsTapped, [0]);
tester.pumpWidget(buildFrame(2));
expect(itemsTapped, isEmpty);
tester.tap(tester.findElementByKey(key));
expect(itemsTapped, [2]);
});
});
}