| // Copyright 2013 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:dynamic_layouts/dynamic_layouts.dart'; |
| import 'package:flutter/rendering.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| test('DynamicSliverGridGeometry returns tight constraints for finite extents', |
| () { |
| const DynamicSliverGridGeometry geometry = DynamicSliverGridGeometry( |
| scrollOffset: 0, |
| crossAxisOffset: 0, |
| mainAxisExtent: 150.0, |
| crossAxisExtent: 50.0, |
| ); |
| |
| // Vertical |
| SliverConstraints sliverConstraints = const SliverConstraints( |
| axisDirection: AxisDirection.down, |
| growthDirection: GrowthDirection.forward, |
| userScrollDirection: ScrollDirection.forward, |
| scrollOffset: 0, |
| precedingScrollExtent: 0, |
| overlap: 0, |
| remainingPaintExtent: 600, |
| crossAxisExtent: 300, |
| crossAxisDirection: AxisDirection.left, |
| viewportMainAxisExtent: 1000, |
| remainingCacheExtent: 600, |
| cacheOrigin: 0.0, |
| ); |
| BoxConstraints constraints = geometry.getBoxConstraints(sliverConstraints); |
| expect(constraints, BoxConstraints.tight(const Size(150.0, 50.0))); |
| |
| // Horizontal |
| sliverConstraints = const SliverConstraints( |
| axisDirection: AxisDirection.left, |
| growthDirection: GrowthDirection.forward, |
| userScrollDirection: ScrollDirection.forward, |
| scrollOffset: 0, |
| precedingScrollExtent: 0, |
| overlap: 0, |
| remainingPaintExtent: 600, |
| crossAxisExtent: 300, |
| crossAxisDirection: AxisDirection.down, |
| viewportMainAxisExtent: 1000, |
| remainingCacheExtent: 600, |
| cacheOrigin: 0.0, |
| ); |
| constraints = geometry.getBoxConstraints(sliverConstraints); |
| expect(constraints, BoxConstraints.tight(const Size(50.0, 150.0))); |
| }); |
| |
| test( |
| 'DynamicSliverGridGeometry returns loose constraints for infinite extents', |
| () { |
| const DynamicSliverGridGeometry geometry = DynamicSliverGridGeometry( |
| scrollOffset: 0, |
| crossAxisOffset: 0, |
| mainAxisExtent: double.infinity, |
| crossAxisExtent: double.infinity, |
| ); |
| |
| // Vertical |
| SliverConstraints sliverConstraints = const SliverConstraints( |
| axisDirection: AxisDirection.down, |
| growthDirection: GrowthDirection.forward, |
| userScrollDirection: ScrollDirection.forward, |
| scrollOffset: 0, |
| precedingScrollExtent: 0, |
| overlap: 0, |
| remainingPaintExtent: 600, |
| crossAxisExtent: 300, |
| crossAxisDirection: AxisDirection.left, |
| viewportMainAxisExtent: 1000, |
| remainingCacheExtent: 600, |
| cacheOrigin: 0.0, |
| ); |
| BoxConstraints constraints = geometry.getBoxConstraints(sliverConstraints); |
| expect(constraints, const BoxConstraints()); |
| |
| // Horizontal |
| sliverConstraints = const SliverConstraints( |
| axisDirection: AxisDirection.left, |
| growthDirection: GrowthDirection.forward, |
| userScrollDirection: ScrollDirection.forward, |
| scrollOffset: 0, |
| precedingScrollExtent: 0, |
| overlap: 0, |
| remainingPaintExtent: 600, |
| crossAxisExtent: 300, |
| crossAxisDirection: AxisDirection.down, |
| viewportMainAxisExtent: 1000, |
| remainingCacheExtent: 600, |
| cacheOrigin: 0.0, |
| ); |
| constraints = geometry.getBoxConstraints(sliverConstraints); |
| expect(constraints, const BoxConstraints()); |
| }); |
| } |