1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 |
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23 | using System;
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24 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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25 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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26 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Tests {
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27 |
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28 |
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29 | [TestClass]
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30 | public class InfixExpressionParserTest {
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31 | [TestMethod]
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32 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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33 | [TestProperty("Time", "short")]
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34 | public void InfixExpressionParserTestFormatting() {
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35 | var formatter = new InfixExpressionFormatter();
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36 | var parser = new InfixExpressionParser();
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37 | Assert.AreEqual("3", formatter.Format(parser.Parse("3")));
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38 | Assert.AreEqual("3 * 3", formatter.Format(parser.Parse("3*3")));
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39 | Assert.AreEqual("3 * 4",formatter.Format(parser.Parse("3 * 4")));
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40 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123E-03")));
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41 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123e-03")));
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42 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123e+03")));
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43 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123E+03")));
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44 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123.0E-03")));
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45 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123.0e-03")));
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46 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123.0e+03")));
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47 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123.0E+03")));
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48 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123.0E-3")));
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49 | Assert.AreEqual("0.123",formatter.Format(parser.Parse("123.0e-3")));
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50 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123.0e+3")));
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51 | Assert.AreEqual("123000",formatter.Format(parser.Parse("123.0E+3")));
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52 |
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53 | Assert.AreEqual("3.1415 + 2",formatter.Format(parser.Parse("3.1415+2.0")));
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54 | Assert.AreEqual("3.1415 / 2",formatter.Format(parser.Parse("3.1415/2.0")));
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55 | Assert.AreEqual("3.1415 * 2",formatter.Format(parser.Parse("3.1415*2.0")));
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56 | Assert.AreEqual("3.1415 - 2", formatter.Format(parser.Parse("3.1415-2.0")));
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57 | // round-trip
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58 | Assert.AreEqual("3.1415 - 2",formatter.Format(parser.Parse(formatter.Format(parser.Parse("3.1415-2.0")))));
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59 | Assert.AreEqual("3.1415 + 2",formatter.Format(parser.Parse("3.1415+(2.0)")));
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60 | Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("(3.1415+(2.0))")));
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61 |
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62 |
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63 | Assert.AreEqual("LOG(3)",formatter.Format(parser.Parse("log(3)")));
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64 | Assert.AreEqual("LOG(-3)",formatter.Format(parser.Parse("log(-3)")));
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65 | Assert.AreEqual("EXP(3)",formatter.Format(parser.Parse("exp(3)")));
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66 | Assert.AreEqual("EXP(-3)",formatter.Format(parser.Parse("exp(-3)")));
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67 | Assert.AreEqual("SQRT(3)", formatter.Format(parser.Parse("sqrt(3)")));
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68 |
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69 | Assert.AreEqual("SQR(-3)", formatter.Format(parser.Parse("sqr((-3))")));
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70 |
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71 | Assert.AreEqual("3 / 3 + 2 / 2 + 1 / 1",formatter.Format(parser.Parse("3/3+2/2+1/1")));
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72 | Assert.AreEqual("-3 + 30 - 2 + 20 - 1 + 10", formatter.Format(parser.Parse("-3+30-2+20-1+10")));
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73 |
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74 | // 'flattening' of nested addition, subtraction, multiplication, or division
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75 | Assert.AreEqual("1 + 2 + 3 + 4", formatter.Format(parser.Parse("1 + 2 + 3 + 4")));
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76 | Assert.AreEqual("1 - 2 - 3 - 4", formatter.Format(parser.Parse("1 - 2 - 3 - 4")));
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77 | Assert.AreEqual("1 * 2 * 3 * 4", formatter.Format(parser.Parse("1 * 2 * 3 * 4")));
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78 | Assert.AreEqual("1 / 2 / 3 / 4", formatter.Format(parser.Parse("1 / 2 / 3 / 4")));
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79 |
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80 | // signed variables / constants
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81 | Assert.AreEqual("-1*'x1'", formatter.Format(parser.Parse("-x1")));
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82 | Assert.AreEqual("1", formatter.Format(parser.Parse("--1.0")));
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83 | Assert.AreEqual("1", formatter.Format(parser.Parse("----1.0")));
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84 | Assert.AreEqual("1", formatter.Format(parser.Parse("-+-1.0")));
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85 | Assert.AreEqual("1", formatter.Format(parser.Parse("+-+-1.0")));
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86 | Assert.AreEqual("-3 + -1", formatter.Format(parser.Parse("-3 + -1.0")));
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87 |
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88 |
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89 | Assert.AreEqual("'x1'",formatter.Format(parser.Parse("\"x1\"")));
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90 | Assert.AreEqual("'var name'",formatter.Format(parser.Parse("\'var name\'")));
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91 | Assert.AreEqual("'var name'",formatter.Format(parser.Parse("\"var name\"")));
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92 | Assert.AreEqual("'1'",formatter.Format(parser.Parse("\"1\"")));
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93 |
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94 | Assert.AreEqual("'var \" name'",formatter.Format(parser.Parse("'var \" name\'")));
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95 | Assert.AreEqual("\"var ' name\"", formatter.Format(parser.Parse("\"var \' name\"")));
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96 |
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97 |
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98 | Assert.AreEqual("'x1' * 'x2'",formatter.Format(parser.Parse("\"x1\"*\"x2\"")));
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99 | Assert.AreEqual("'x1' * 'x2' + 'x3' * 'x4'",formatter.Format(parser.Parse("\"x1\"*\"x2\"+\"x3\"*\"x4\"")));
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100 | Assert.AreEqual("'x1' * 'x2' + 'x3' * 'x4'", formatter.Format(parser.Parse("x1*x2+x3*x4")));
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101 |
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102 |
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103 | Assert.AreEqual("3 ^ 2",formatter.Format(parser.Parse("POW(3, 2)")));
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104 | Assert.AreEqual("3.1 ^ 2.1",formatter.Format(parser.Parse("POW(3.1, 2.1)")));
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105 | Assert.AreEqual("3.1 ^ 2.1",formatter.Format(parser.Parse("POW(3.1 , 2.1)")));
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106 | Assert.AreEqual("3.1 ^ 2.1",formatter.Format(parser.Parse("POW(3.1 ,2.1)")));
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107 | Assert.AreEqual("-3.1 ^ -2.1",formatter.Format(parser.Parse("POW(-3.1 , - 2.1)")));
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108 | Assert.AreEqual("ROOT(3, 2)",formatter.Format(parser.Parse("ROOT(3, 2)")));
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109 | Assert.AreEqual("ROOT(3.1, 2.1)",formatter.Format(parser.Parse("ROOT(3.1, 2.1)")));
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110 | Assert.AreEqual("ROOT(3.1, 2.1)",formatter.Format(parser.Parse("ROOT(3.1 , 2.1)")));
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111 | Assert.AreEqual("ROOT(3.1, 2.1)",formatter.Format(parser.Parse("ROOT(3.1 ,2.1)")));
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112 | Assert.AreEqual("ROOT(-3.1, -2.1)", formatter.Format(parser.Parse("ROOT(-3.1 , -2.1)")));
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113 |
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114 | Assert.AreEqual("IF(GT(0, 1), 1, 0)",formatter.Format(parser.Parse("IF(GT( 0, 1), 1, 0)")));
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115 | Assert.AreEqual("IF(LT(0, 1), 1, 0)",formatter.Format(parser.Parse("IF(LT(0,1), 1 , 0)")));
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116 | Assert.AreEqual("LAG('x', 1)",formatter.Format(parser.Parse("LAG(x, 1)")));
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117 | Assert.AreEqual("LAG('x', -1)",formatter.Format(parser.Parse("LAG(x, -1)")));
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118 | Assert.AreEqual("LAG('x', 1)",formatter.Format(parser.Parse("LAG(x, +1)")));
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119 | Assert.AreEqual("'x' * LAG('x', 1)", formatter.Format(parser.Parse("x * LAG('x', +1)")));
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120 |
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121 | // factor variables
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122 | Assert.AreEqual("'x'[1] * 'y'",formatter.Format(parser.Parse("x [1.0] * y")));
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123 | Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]",formatter.Format(parser.Parse("x [1.0, 2.0] * y [1.0, 2.0]")));
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124 | Assert.AreEqual("'x'[1] * 'y'",formatter.Format(parser.Parse("x[1] * y")));
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125 | Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]",formatter.Format(parser.Parse("x[1, 2] * y [1, 2]")));
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126 | Assert.AreEqual("'x'[1] * 'y'",formatter.Format(parser.Parse("x [+1.0] * y")));
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127 | Assert.AreEqual("'x'[-1] * 'y'",formatter.Format(parser.Parse("x [-1.0] * y")));
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128 | Assert.AreEqual("'x'[-1, -2] * 'y'[1, 2]", formatter.Format(parser.Parse("x [-1.0, -2.0] * y [+1.0, +2.0]")));
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129 |
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130 | // one-hot for factor
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131 | Assert.AreEqual("'x' = 'val' * 'y'",formatter.Format(parser.Parse("x='val' * y")));
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132 | Assert.AreEqual("'x' = 'val'",formatter.Format(parser.Parse("x = 'val'")));
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133 | Assert.AreEqual("'x' = 'val'",formatter.Format(parser.Parse("x = \"val\"")));
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134 | Assert.AreEqual("1 * 'x' = 'val'",formatter.Format(parser.Parse("1.0 * x = val")));
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135 | Assert.AreEqual("-1 * 'x' = 'val'",formatter.Format(parser.Parse("-1.0 * x = val")));
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136 | Assert.AreEqual("1 * 'x' = 'val1' + 'y' = 'val2'", formatter.Format(parser.Parse("+1.0 * \"x\" = val1 + y = \"val2\"")));
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137 |
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138 | // numeric parameters
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139 | Assert.AreEqual("0", formatter.Format(parser.Parse("<num>"))); // default initial value is zero
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140 | Assert.AreEqual("0", formatter.Format(parser.Parse("< num >")));
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141 | Assert.AreEqual("1", formatter.Format(parser.Parse("< num=1.0>")));
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142 | Assert.AreEqual("1", formatter.Format(parser.Parse("< num = 1.0>")));
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143 | Assert.AreEqual("-1", formatter.Format(parser.Parse("< num =-1.0>")));
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144 | Assert.AreEqual("-1", formatter.Format(parser.Parse("< num = - 1.0>")));
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145 |
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146 | // numeric parameter with sign
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147 | Assert.AreEqual("1", formatter.Format(parser.Parse("-<num=-1.0>")));
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148 |
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149 | // nested functions
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150 | Assert.AreEqual("SIN(SIN(SIN('X1')))", formatter.Format(parser.Parse("SIN(SIN(SIN(X1)))")));
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151 |
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152 | {
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153 | // a tree with single-arity multiplication and addition
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154 | // ...
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155 | // *
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156 | // |
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157 | // +
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158 | // / \
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159 | // v1 v2
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160 | //
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161 | // is still formatted as (v1 + v2) even though it is not strictly necessary
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162 | var root = new ProgramRootSymbol().CreateTreeNode();
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163 | var start = new StartSymbol().CreateTreeNode();
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164 | var mul = new Multiplication().CreateTreeNode();
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165 | var add = new Addition().CreateTreeNode();
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166 | var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0;
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167 | var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0;
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168 | add.AddSubtree(var1);
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169 | add.AddSubtree(var2);
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170 | mul.AddSubtree(add);
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171 | start.AddSubtree(mul);
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172 | root.AddSubtree(start);
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173 | var t = new SymbolicExpressionTree(root);
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174 |
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175 | Assert.AreEqual("('x1' + 'x2')", formatter.Format(t)); // TODO parenthesis not strictly required here
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176 | }
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177 | {
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178 | // *
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179 | // |\
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180 | // * v3
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181 | // |
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182 | // +
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183 | // / \
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184 | // v1 v2
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185 | //
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186 | // is still formatted as (v1 + v2) even though it is not strictly necessary
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187 | var root = new ProgramRootSymbol().CreateTreeNode();
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188 | var start = new StartSymbol().CreateTreeNode();
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189 | var mul1 = new Multiplication().CreateTreeNode();
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190 | var mul2 = new Multiplication().CreateTreeNode();
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191 | var add = new Addition().CreateTreeNode();
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192 | var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0;
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193 | var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0;
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194 | var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0;
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195 | add.AddSubtree(var1);
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196 | add.AddSubtree(var2);
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197 | mul2.AddSubtree(add);
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198 | mul1.AddSubtree(mul2);
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199 | mul1.AddSubtree(var3);
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200 | start.AddSubtree(mul1);
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201 | root.AddSubtree(start);
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202 | var t = new SymbolicExpressionTree(root);
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203 |
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204 | Assert.AreEqual("('x1' + 'x2') * 'x3'", formatter.Format(t));
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205 | }
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206 |
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207 | {
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208 | // sin
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209 | // |
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210 | // *
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211 | // |
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212 | // +
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213 | // / \
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214 | // v1 v2
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215 | //
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216 | // is still formatted as (v1 + v2) even though it is not strictly necessary
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217 | var root = new ProgramRootSymbol().CreateTreeNode();
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218 | var start = new StartSymbol().CreateTreeNode();
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219 | var sin = new Sine().CreateTreeNode();
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220 | var mul = new Multiplication().CreateTreeNode();
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221 | var add = new Addition().CreateTreeNode();
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222 | var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0;
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223 | var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0;
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224 | add.AddSubtree(var1);
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225 | add.AddSubtree(var2);
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226 | mul.AddSubtree(add);
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227 | sin.AddSubtree(mul);
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228 | start.AddSubtree(sin);
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229 | root.AddSubtree(start);
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230 | var t = new SymbolicExpressionTree(root);
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231 |
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232 | Assert.AreEqual("SIN(('x1' + 'x2'))", formatter.Format(t)); // TODO would be better to prevent double parenthesis here
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233 | }
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234 | }
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235 | }
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236 | }
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