flutter/packages/unit/test/widget/snack_bar_test.dart
Ian Hickson 8a900f9042 Track scroll position
- Change RouteArguments to pass the route's BuildContext rather than
  the Navigator. This caused the bulk of the examples/ and .../test/
  changes (those are mostly mechanical changes). It also meant I could
  simplify Navigator.of().

- Make initState() actually get called when the State's Element is in
  the tree, so you can use Foo.of() functions there. Added a test for
  this also.

- Provide a RouteWidget so that routes have a position in the Widget
  tree. The bulk of the route logic is still in a longer-lived Route
  object for now.

- Make Route.setState() only rebuild the actual route, not the whole
  navigator.

- Provided a Route.of().

- Provided a Route.writeState / Route.readState API that tries to
  identify the clients by their runtimeType, their key, and their
  ancestors keys, up to the nearest ancestor with a GlobalKey.

- Made scrollables hook into this API to track state. Added a test to
  make sure this works.

- Fix the debug output of GestureDetector and the hashCode of
  MixedViewport.

- Fixed ScrollableWidgetListState<T> to handle infinite lists.
2015-10-27 13:46:07 -07:00

41 lines
1.1 KiB
Dart

import 'package:flutter/material.dart';
import 'package:test/test.dart';
import 'widget_tester.dart';
void main() {
test('SnackBar control test', () {
testWidgets((WidgetTester tester) {
String helloSnackBar = 'Hello SnackBar';
GlobalKey<PlaceholderState> placeholderKey = new GlobalKey<PlaceholderState>();
Key tapTarget = new Key('tap-target');
tester.pumpWidget(new MaterialApp(
routes: <String, RouteBuilder>{
'/': (RouteArguments args) {
return new GestureDetector(
onTap: () {
showSnackBar(
context: args.context,
placeholderKey: placeholderKey,
content: new Text(helloSnackBar)
);
},
child: new Center(
key: tapTarget,
child: new Placeholder(key: placeholderKey)
)
);
}
}
));
tester.tap(tester.findElementByKey(tapTarget));
expect(tester.findText(helloSnackBar), isNull);
tester.pump();
expect(tester.findText(helloSnackBar), isNotNull);
});
});
}