// 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/painting.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { test('FractionalOffset control test', () { const FractionalOffset a = FractionalOffset(0.5, 0.25); const FractionalOffset b = FractionalOffset(1.25, 0.75); expect(a, hasOneLineDescription); expect(a.hashCode, equals(const FractionalOffset(0.5, 0.25).hashCode)); expect(a.toString(), equals('FractionalOffset(0.5, 0.3)')); expect(-a, const FractionalOffset(-0.5, -0.25)); expect(a - b, const FractionalOffset(-0.75, -0.5)); expect(a + b, const FractionalOffset(1.75, 1.0)); expect(a * 2.0, FractionalOffset.centerRight); expect(a / 2.0, const FractionalOffset(0.25, 0.125)); expect(a ~/ 2.0, FractionalOffset.topLeft); expect(a % 5.0, const FractionalOffset(0.5, 0.25)); }); test('FractionalOffset.lerp()', () { const FractionalOffset a = FractionalOffset.topLeft; const FractionalOffset b = FractionalOffset.topCenter; expect(FractionalOffset.lerp(a, b, 0.25), equals(const FractionalOffset(0.125, 0.0))); expect(FractionalOffset.lerp(null, null, 0.25), isNull); expect(FractionalOffset.lerp(null, b, 0.25), equals(const FractionalOffset(0.5, 0.5 - 0.125))); expect(FractionalOffset.lerp(a, null, 0.25), equals(const FractionalOffset(0.125, 0.125))); }); test('FractionalOffset.fromOffsetAndSize()', () { final FractionalOffset a = FractionalOffset.fromOffsetAndSize(const Offset(100.0, 100.0), const Size(200.0, 400.0)); expect(a, const FractionalOffset(0.5, 0.25)); }); test('FractionalOffset.fromOffsetAndRect()', () { final FractionalOffset a = FractionalOffset.fromOffsetAndRect(const Offset(150.0, 120.0), const Rect.fromLTWH(50.0, 20.0, 200.0, 400.0)); expect(a, const FractionalOffset(0.5, 0.25)); }); }