| // 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_gallery/demo/calculator/logic.dart'; |
| |
| // ignore: deprecated_member_use |
| import 'package:test_api/test_api.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')); |
| }); |
| } |