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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/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
test('AxisDirection and applyGrowthDirectionToAxisDirection', () {
expect(AxisDirection.values.length, 4);
for (AxisDirection axisDirection in AxisDirection.values)
expect(applyGrowthDirectionToAxisDirection(axisDirection, GrowthDirection.forward), axisDirection);
expect(applyGrowthDirectionToAxisDirection(AxisDirection.up, GrowthDirection.reverse), AxisDirection.down);
expect(applyGrowthDirectionToAxisDirection(AxisDirection.down, GrowthDirection.reverse), AxisDirection.up);
expect(applyGrowthDirectionToAxisDirection(AxisDirection.left, GrowthDirection.reverse), AxisDirection.right);
expect(applyGrowthDirectionToAxisDirection(AxisDirection.right, GrowthDirection.reverse), AxisDirection.left);
});
test('SliverConstraints', () {
final SliverConstraints a = const SliverConstraints(
axisDirection: AxisDirection.down,
growthDirection: GrowthDirection.forward,
userScrollDirection: ScrollDirection.idle,
scrollOffset: 0.0,
overlap: 0.0,
remainingPaintExtent: 0.0,
crossAxisExtent: 0.0,
crossAxisDirection: AxisDirection.right,
viewportMainAxisExtent: 0.0,
);
final SliverConstraints b = a.copyWith();
expect(a, equals(b));
expect(a.hashCode, equals(b.hashCode));
expect(a.toString(), equals(b.toString()));
expect(a, hasOneLineDescription);
expect(a.normalizedGrowthDirection, equals(GrowthDirection.forward));
final SliverConstraints c = a.copyWith(
axisDirection: AxisDirection.up,
growthDirection: GrowthDirection.reverse,
userScrollDirection: ScrollDirection.forward,
scrollOffset: 10.0,
overlap: 20.0,
remainingPaintExtent: 30.0,
crossAxisExtent: 40.0,
viewportMainAxisExtent: 30.0,
);
final SliverConstraints d = const SliverConstraints(
axisDirection: AxisDirection.up,
growthDirection: GrowthDirection.reverse,
userScrollDirection: ScrollDirection.forward,
scrollOffset: 10.0,
overlap: 20.0,
remainingPaintExtent: 30.0,
crossAxisExtent: 40.0,
crossAxisDirection: AxisDirection.right,
viewportMainAxisExtent: 30.0,
);
expect(c, equals(d));
expect(c.normalizedGrowthDirection, equals(GrowthDirection.forward));
expect(d.normalizedGrowthDirection, equals(GrowthDirection.forward));
final SliverConstraints e = d.copyWith(axisDirection: AxisDirection.right);
expect(e.normalizedGrowthDirection, equals(GrowthDirection.reverse));
final SliverConstraints f = d.copyWith(axisDirection: AxisDirection.left);
expect(f.normalizedGrowthDirection, equals(GrowthDirection.forward));
final SliverConstraints g = d.copyWith(growthDirection: GrowthDirection.forward);
expect(g.normalizedGrowthDirection, equals(GrowthDirection.reverse));
});
test('SliverGeometry', () {
expect(const SliverGeometry().debugAssertIsValid(), isTrue);
expect(() {
const SliverGeometry(layoutExtent: 10.0, paintExtent: 9.0).debugAssertIsValid();
}, throwsFlutterError);
expect(() {
const SliverGeometry(paintExtent: 9.0, maxPaintExtent: 8.0).debugAssertIsValid();
}, throwsFlutterError);
});
}