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// Copyright 2014 The Flutter 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 '../rendering/mock_canvas.dart';
void main() {
testWidgets('overflow indicator is not shown when not overflowing', (WidgetTester tester) async {
await tester.pumpWidget(
const Center(
child: UnconstrainedBox(
child: SizedBox(width: 200.0, height: 200.0),
),
),
);
expect(find.byType(UnconstrainedBox), isNot(paints..rect()));
});
testWidgets('overflow indicator is shown when overflowing', (WidgetTester tester) async {
const UnconstrainedBox box = UnconstrainedBox(
child: SizedBox(width: 200.0, height: 200.0),
);
await tester.pumpWidget(
const Center(
child: SizedBox(
height: 100.0,
child: box,
),
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(exception.diagnostics.first.level, DiagnosticLevel.summary);
expect(exception.diagnostics.first.toString(), startsWith('A RenderUnconstrainedBox overflowed by '));
expect(find.byType(UnconstrainedBox), paints..rect());
await tester.pumpWidget(
const Center(
child: SizedBox(
height: 100.0,
child: box,
),
),
);
// Doesn't throw the exception a second time, because we didn't reset
// overflowReportNeeded.
expect(tester.takeException(), isNull);
expect(find.byType(UnconstrainedBox), paints..rect());
});
testWidgets('overflow indicator is not shown when constraint size is zero.', (WidgetTester tester) async {
await tester.pumpWidget(
const Center(
child: SizedBox(
height: 0.0,
child: UnconstrainedBox(
child: SizedBox(width: 200.0, height: 200.0),
),
),
),
);
expect(find.byType(UnconstrainedBox), isNot(paints..rect()));
});
}