// 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/physics.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { test('Gravity simulation 1', () { expect(GravitySimulation(9.81, 10.0, 0.0, 0.0), hasOneLineDescription); expect(GravitySimulation(9.81, 10.0, 0.0, 0.0).x(10.0), moreOrLessEquals(50.0 * 9.81 + 10.0)); }); test('Gravity simulation 2', () { final GravitySimulation gravity = GravitySimulation(-10, 0.0, 6.0, 10.0); expect(gravity.x(0.0), equals(0.0)); expect(gravity.dx(0.0), equals(10.0)); expect(gravity.isDone(0.0), isFalse); expect(gravity.x(1.0), equals(5.0)); expect(gravity.dx(1.0), equals(0.0)); expect(gravity.isDone(0.2), isFalse); expect(gravity.x(2.0), equals(0.0)); expect(gravity.dx(2.0), equals(-10.0)); expect(gravity.isDone(2.0), isFalse); expect(gravity.x(3.0), equals(-15.0)); expect(gravity.dx(3.0), equals(-20.0)); expect(gravity.isDone(3.0), isTrue); }); }