| // Copyright 2016 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_gallery/demo/calculator/logic.dart'; |
| |
| import 'package:test/test.dart' hide TypeMatcher, isInstanceOf; |
| |
| void main() { |
| test('Test order of operations: 12 + 3 * 4 = 24', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendDigit(1); |
| expression = expression.appendDigit(2); |
| expression = expression.appendOperation(Operation.Addition); |
| expression = expression.appendDigit(3); |
| expression = expression.appendOperation(Operation.Multiplication); |
| expression = expression.appendDigit(4); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('24')); |
| }); |
| |
| test('Test floating point 0.1 + 0.2 = 0.3', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendDigit(0); |
| expression = expression.appendPoint(); |
| expression = expression.appendDigit(1); |
| expression = expression.appendOperation(Operation.Addition); |
| expression = expression.appendDigit(0); |
| expression = expression.appendPoint(); |
| expression = expression.appendDigit(2); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('0.3')); |
| }); |
| |
| test('Test floating point 1.0/10.0 = 0.1', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendDigit(1); |
| expression = expression.appendPoint(); |
| expression = expression.appendDigit(0); |
| expression = expression.appendOperation(Operation.Division); |
| expression = expression.appendDigit(1); |
| expression = expression.appendDigit(0); |
| expression = expression.appendPoint(); |
| expression = expression.appendDigit(0); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('0.1')); |
| }); |
| |
| test('Test 1/0 = Infinity', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendDigit(1); |
| expression = expression.appendOperation(Operation.Division); |
| expression = expression.appendDigit(0); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('Infinity')); |
| }); |
| |
| test('Test use result in next calculation: 1 + 1 = 2 + 1 = 3 + 1 = 4', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendDigit(1); |
| expression = expression.appendOperation(Operation.Addition); |
| expression = expression.appendDigit(1); |
| expression = expression.computeResult(); |
| expression = expression.appendOperation(Operation.Addition); |
| expression = expression.appendDigit(1); |
| expression = expression.computeResult(); |
| expression = expression.appendOperation(Operation.Addition); |
| expression = expression.appendDigit(1); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('4')); |
| }); |
| |
| test('Test minus -3 - -2 = -1', () { |
| CalcExpression expression = CalcExpression.empty(); |
| expression = expression.appendMinus(); |
| expression = expression.appendDigit(3); |
| expression = expression.appendMinus(); |
| expression = expression.appendMinus(); |
| expression = expression.appendDigit(2); |
| expression = expression.computeResult(); |
| expect(expression.state, equals(ExpressionState.Result)); |
| expect(expression.toString(), equals('-1')); |
| }); |
| } |