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1 using Stocks.Common.Models;
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2 using Xunit;
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3 using System.Collections.Generic;
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4
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5 namespace Stocks.Common.Tests.Unit.Models
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6 {
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7 public class PriceTests
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8 {
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9 #region GetHashCode tests
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10 [Fact]
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11 public void GetHashCode_success()
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12 {
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13 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal) 123.45, PreviousPrice = 0 };
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14 var rhs = new Price();
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15 rhs.Symbol = "GOOG";
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16 rhs.CurrentPrice = (decimal) 123.45;
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17 rhs.PreviousPrice = 0;
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18 var expected = lhs.GetHashCode();
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19 var actual = rhs.GetHashCode();
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20 Assert.Equal(expected, actual);
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21 }
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22
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23 [Fact]
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24 public void GetHashCode_should_be_different()
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25 {
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26 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal) 123.45, PreviousPrice = 0 };
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27 var rhs = new Price();
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28 rhs.Symbol = "GOOG";
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29 rhs.CurrentPrice = 0;
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30 rhs.PreviousPrice = (decimal)123.45;
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31 var expected = lhs.GetHashCode();
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32 var actual = rhs.GetHashCode();
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33 Assert.NotEqual(expected, actual);
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34 }
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35
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36 [Fact]
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37 public void GetHashCode_should_be_different_and_not_overflow()
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38 {
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39 var lhs = new Price()
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40 {
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41 Symbol = "GOOG",
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42 CurrentPrice = (decimal) 999999.99,
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43 PreviousPrice = (decimal) 999999.99
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44 };
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45 var rhs = new Price();
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46 rhs.Symbol = "GOOG";
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47 rhs.CurrentPrice = (decimal) 999999.99;
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48 rhs.PreviousPrice = 0;
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49 var expected = lhs.GetHashCode();
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50 var actual = rhs.GetHashCode();
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51 Assert.NotEqual(expected, actual);
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52 }
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53 #endregion
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54
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55 #region Equals tests
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56 [Fact]
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57 public void Equals_success()
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58 {
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59 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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60 var rhs = new Price();
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61 rhs.Symbol = "GOOG";
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62 rhs.CurrentPrice = (decimal)123.45;
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63 rhs.PreviousPrice = 0;
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64 var expected = true;
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65
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66 var actual = lhs.Equals(rhs);
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67 Assert.Equal(expected, actual);
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68
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69 actual = rhs.Equals(lhs);
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70 Assert.Equal(expected, actual);
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71 }
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72
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73 [Fact]
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74 public void Equals_expected_to_fail()
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75 {
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76 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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77 var rhs = new Price();
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78 rhs.Symbol = "GOOG";
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79 rhs.CurrentPrice = (decimal)123.44;
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80 rhs.PreviousPrice = 0;
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81 var expected = true;
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82
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83 var actual = lhs.Equals(rhs);
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84 Assert.NotEqual(expected, actual);
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85
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86 actual = rhs.Equals(lhs);
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87 Assert.NotEqual(expected, actual);
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88 }
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89
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90 [Fact]
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91 public void Equals_success_using_object()
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92 {
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93 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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94 var rhs = new Price();
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95 rhs.Symbol = "GOOG";
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96 rhs.CurrentPrice = (decimal)123.45;
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97 rhs.PreviousPrice = 0;
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98
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99 object obj = rhs;
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100 var expected = true;
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101
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102 var actual = lhs.Equals(obj);
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103 Assert.Equal(expected, actual);
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104 }
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105
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106 [Fact]
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107 public void Equals_expected_to_fail_using_object()
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108 {
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109 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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110 var rhs = new Price();
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111 rhs.Symbol = "GOOG";
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112 rhs.CurrentPrice = (decimal)123.46;
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113 rhs.PreviousPrice = 0;
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114
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115 object obj = rhs;
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116 var expected = true;
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117
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118 var actual = lhs.Equals(obj);
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119 Assert.NotEqual(expected, actual);
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120 }
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121 #endregion
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122
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123 #region CompareTo tests
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124
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125 public void CompareTo_the_same_by_symbol_implicit_comparer()
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126 {
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127 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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128
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129 var rhs = new Price();
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130 rhs.Symbol = "GOOG";
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131 rhs.CurrentPrice = (decimal)999;
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132 rhs.PreviousPrice = 0;
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133
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134 var expected = 0;
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135 var actual = lhs.CompareTo(rhs);
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136
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137 Assert.Equal(expected, actual);
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138 }
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139
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140 public void CompareTo_different_by_symbol_implicit_comparer()
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141 {
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142 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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143
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144 var rhs = new Price();
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145 rhs.Symbol = "AAPL";
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146 rhs.CurrentPrice = (decimal)123.45;
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147 rhs.PreviousPrice = 0;
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148
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149 var expected = 1;
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150 var actual = lhs.CompareTo(rhs);
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151
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152 Assert.Equal(expected, actual);
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153
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154 expected = -1;
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155 actual = rhs.CompareTo(lhs);
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156
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157 Assert.Equal(expected, actual);
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158 }
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159
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160 public void CompareTo_same_by_current_price()
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161 {
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162 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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163
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164 var rhs = new Price();
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165 rhs.Symbol = "MSFT";
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166 rhs.CurrentPrice = (decimal)123.45;
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167 rhs.PreviousPrice = (decimal)999;
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168
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169 var expected = 0;
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170 var actual = rhs.CompareTo(lhs, PriceComparisonType.CurrentPrice);
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171
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172 Assert.Equal(expected, actual);
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173 }
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174
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175 public void CompareTo_different_by_current_price()
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176 {
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177 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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178
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179 var rhs = new Price();
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180 rhs.Symbol = "MSFT";
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181 rhs.CurrentPrice = (decimal)9;
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182 rhs.PreviousPrice = (decimal)999;
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183
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184 var expected = -1;
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185 var actual = lhs.CompareTo(rhs, PriceComparisonType.CurrentPrice);
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186
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187 Assert.Equal(expected, actual);
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188
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189 expected = 1;
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190 actual = rhs.CompareTo(lhs, PriceComparisonType.CurrentPrice);
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191 Assert.Equal(expected, actual);
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192 }
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193
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194 public void CompareTo_same_by_previous_price()
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195 {
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196 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)44, PreviousPrice = 999 };
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197
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198 var rhs = new Price();
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199 rhs.Symbol = "MSFT";
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200 rhs.CurrentPrice = (decimal)123.45;
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201 rhs.PreviousPrice = (decimal)999;
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202
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203 var expected = 0;
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204 var actual = rhs.CompareTo(lhs, PriceComparisonType.PreviousPrice);
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205
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206 Assert.Equal(expected, actual);
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207 }
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208
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209 public void CompareTo_different_by_previous_price()
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210 {
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211 var lhs = new Price() { Symbol = "GOOG", CurrentPrice = (decimal)123.45, PreviousPrice = 0 };
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212
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213 var rhs = new Price();
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214 rhs.Symbol = "MSFT";
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215 rhs.CurrentPrice = (decimal)9;
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216 rhs.PreviousPrice = (decimal)999;
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217
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218 var expected = -1;
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219 var actual = lhs.CompareTo(rhs, PriceComparisonType.PreviousPrice);
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220
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221 Assert.Equal(expected, actual);
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222
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223 expected = 1;
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224 actual = rhs.CompareTo(lhs, PriceComparisonType.PreviousPrice);
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225 Assert.Equal(expected, actual);
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226 }
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227 #endregion
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228
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229 #region == tests
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230
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231 #endregion
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232
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233 #region != tests
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234
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235 #endregion
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236
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237 #region List tests
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238
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239 [Fact]
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240 public void Sorting_a_list()
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241 {
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242 var actual = getListOfPrices();
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243
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244 var expected = new List<Price>(5)
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245 {
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246 new Price() { Symbol = "AAPL", CurrentPrice = (decimal)123.45, PreviousPrice = (decimal) 123.40 },
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247 new Price() { Symbol = "DIZ", CurrentPrice = (decimal)96.45, PreviousPrice = (decimal) 87.20 },
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248 new Price() { Symbol = "GOOG", CurrentPrice = (decimal)89.23, PreviousPrice = (decimal) 90.86 },
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249 new Price() { Symbol = "MSFT", CurrentPrice = (decimal)67.45, PreviousPrice = (decimal) 92.23 },
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250 new Price() { Symbol = "ZZZ", CurrentPrice = (decimal)3123.45, PreviousPrice = (decimal) 3123.45 }
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251 };
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252
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253 actual.Sort();
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254 Assert.Equal(expected, actual);
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255 }
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256
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257 [Fact]
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258 public void Sorting_a_list_by_currentPrice()
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259 {
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260 var actual = getListOfPrices();
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261
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262 var expected = new List<Price>(5)
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263 {
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264 new Price() { Symbol = "MSFT", CurrentPrice = (decimal)67.45, PreviousPrice = (decimal) 92.23 },
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265 new Price() { Symbol = "GOOG", CurrentPrice = (decimal)89.23, PreviousPrice = (decimal) 90.86 },
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266 new Price() { Symbol = "DIZ", CurrentPrice = (decimal)96.45, PreviousPrice = (decimal) 87.20 },
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267 new Price() { Symbol = "AAPL", CurrentPrice = (decimal)123.45, PreviousPrice = (decimal) 123.40 },
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268 new Price() { Symbol = "ZZZ", CurrentPrice = (decimal)3123.45, PreviousPrice = (decimal) 3123.45 }
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269 };
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270
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271 var comparer = new Price.PriceComparer();
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272 comparer.ComparisonMethod = PriceComparisonType.CurrentPrice;
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273 actual.Sort(comparer);
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274 Assert.Equal(expected, actual);
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275 }
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276
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277 [Fact]
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278 public void Sorting_a_list_by_previousPrice()
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279 {
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280 var actual = getListOfPrices();
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281
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282 var expected = new List<Price>(5)
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283 {
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284 new Price() { Symbol = "DIZ", CurrentPrice = (decimal)96.45, PreviousPrice = (decimal) 87.20 },
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285 new Price() { Symbol = "GOOG", CurrentPrice = (decimal)89.23, PreviousPrice = (decimal) 90.86 },
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286 new Price() { Symbol = "MSFT", CurrentPrice = (decimal)67.45, PreviousPrice = (decimal) 92.23 },
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287 new Price() { Symbol = "AAPL", CurrentPrice = (decimal)123.45, PreviousPrice = (decimal) 123.40 },
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288 new Price() { Symbol = "ZZZ", CurrentPrice = (decimal)3123.45, PreviousPrice = (decimal) 3123.45 }
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289 };
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290
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291 var comparer = new Price.PriceComparer();
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292 comparer.ComparisonMethod = PriceComparisonType.PreviousPrice;
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293 actual.Sort(comparer);
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294 Assert.Equal(expected, actual);
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295 }
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296
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297 private List<Price> getListOfPrices()
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298 {
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299 return new List<Price>(5)
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300 {
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301 new Price() { Symbol = "GOOG", CurrentPrice = (decimal)89.23, PreviousPrice = (decimal) 90.86 },
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302 new Price() { Symbol = "AAPL", CurrentPrice = (decimal)123.45, PreviousPrice = (decimal) 123.40 },
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303 new Price() { Symbol = "MSFT", CurrentPrice = (decimal)67.45, PreviousPrice = (decimal) 92.23 },
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304 new Price() { Symbol = "ZZZ", CurrentPrice = (decimal)3123.45, PreviousPrice = (decimal) 3123.45 },
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305 new Price() { Symbol = "DIZ", CurrentPrice = (decimal)96.45, PreviousPrice = (decimal) 87.20 }
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306 };
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307 }
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308
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309 #endregion
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310
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311 // need to test for null and other object types being passed in as null
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312 }
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313 }
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