linear_drag_test.dart
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import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:sheet/sheet.dart';
import '../helpers.dart';
import '../screen_size_test.dart';
void main() {
group('Sheet linear drags', () {
testWidgets('moves expected offset', (WidgetTester tester) async {
await tester.pumpApp(
Sheet(
initialExtent: 400,
child: Container(height: kScreenRect.height),
),
);
final double topOffset = kScreenRect.bottom - 400;
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(topOffset));
await tester.dragSheet(-topOffset); // Drags to the top
await tester.pumpAndSettle();
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(0));
await tester.dragSheet(kScreenHeight); // Drags all the way down
await tester.pumpAndSettle();
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(kScreenRect.bottom));
});
testWidgets('moves maximun the available viewport',
(WidgetTester tester) async {
await tester.pumpApp(
Sheet(
initialExtent: 400,
child: Container(
height: kScreenRect.height,
),
),
);
final double topOffset = kScreenRect.bottom - 400;
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(topOffset));
// Drags 100 more than needed to reach top
await tester.dragSheet(-topOffset - 100);
await tester.pumpAndSettle();
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(0));
});
testWidgets('moves down no more than the bottom of the screen',
(WidgetTester tester) async {
await tester.pumpApp(
Sheet(
initialExtent: 400,
child: Container(height: kScreenRect.height),
),
);
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(kScreenRect.bottom - 400));
// Drags 100 more than needed to reach bottom
await tester.dragSheet(400 + 100);
await tester.pumpAndSettle();
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(kScreenRect.bottom));
});
testWidgets('does not move more than max extent',
(WidgetTester tester) async {
const double height = 500;
await tester.pumpApp(
Sheet(
maxExtent: height,
initialExtent: 400,
child: Container(
height: height,
),
),
);
expect(tester.getSheetHeight(), equals(height));
expect(tester.getSheetTop(), equals(kScreenRect.bottom - 400));
await tester.dragSheet(-600.0); // We drag way more than the top
await tester.pumpAndSettle();
expect(tester.getSheetHeight(), equals(height));
expect(tester.getSheetTop(), equals(kScreenRect.bottom - height));
});
testWidgets('does not move less than min extent',
(WidgetTester tester) async {
await tester.pumpApp(
Sheet(
initialExtent: 400,
minExtent: 200,
child: Container(
height: kScreenRect.height,
),
),
);
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(kScreenRect.bottom - 400));
// We drag way more than to reach the bottom
await tester.dragSheet(600.0);
await tester.pumpAndSettle();
expect(tester.getSheetSize(), equals(kScreenRect.size));
expect(tester.getSheetTop(), equals(kScreenRect.bottom - 200));
});
});
}