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From tutorial.js remove duplicate testools.js code.
author Jonathan Fine <jfine@pytex.org>
date Mon, 31 Oct 2011 20:09:50 +0000
parents 20d76c716c9d
children abfb176c7346
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
139
de308579ea0d From tutorial.js remove duplicate testools.js code.
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1 // [Rhino] $ js -f testtools.js -f tutorial.js
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2 // [JSDB] $ jsdb -load testtools.js -load tutorial.js
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3
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4 // start warm-up
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5 TEST('warm-up', function()
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6 {
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7 assert( '0' == 0 );
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8 assert ( 0 == '' );
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9 assert( '0' != '' );
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10
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11 var a = NaN;
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12 assert( a != a );
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13
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14 });
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15 // end warm-up
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18 // start closures
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19 TEST('closures', function()
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20 {
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21 // A factory for creating get-set pairs.
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22 var get_set_factory = function(){
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24 var value;
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25 var get = function(){
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26 return value;
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27 };
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28 var set = function(new_value){
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29 value = new_value;
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30 };
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32 return {
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33 get: get,
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34 set: set
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35 };
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36 };
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38 // Create and unpack two get-set pairs.
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39 var tmp;
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40 tmp= get_set_factory();
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41 var get_a = tmp.get;
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42 var set_a = tmp.set;
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44 tmp= get_set_factory();
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45 var get_b = tmp.get;
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46 var set_b = tmp.set;
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48 // Test that both pairs work.
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49 set_a(12);
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50 assert( get_a() === 12 );
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51
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52 set_b(13);
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53 assert( get_b() === 13 );
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54
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55 // Test that each pair has its own value.
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56 assert( get_a() === 12 );
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57
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58 });
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59 // end closures
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60
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61
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62 // start return_this
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63 TEST('return_this', function()
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64 {
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65 var return_this = function(){
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66 return this;
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67 };
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68
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69 var default_this = return_this();
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70 assert( default_this.telltail === 'global' );
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71
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72 var obj = {};
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73 obj.return_this = return_this;
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74 assert( obj.return_this === return_this );
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75
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76 assert( obj.return_this() === obj );
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77 assert( obj['return_this']() === obj );
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78
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79 assert( return_this.call(obj) === obj );
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80 assert( return_this.apply(obj) === obj );
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81
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82 assert( return_this.call(undefined).telltail === 'global' );
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83 assert( return_this.apply(undefined).telltail === 'global' );
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84
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85 });
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86 // end return_this
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87
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88
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89 // start transient-bind
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90 TEST('transient-bind', function()
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91 {
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92 // Set up the test object.
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93 var return_this = function(){
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94 return this;
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95 };
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96 var obj = {
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97 return_this : return_this
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98 };
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99
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100 // Deferring method call changes the outcome.
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101 var method_deferred = obj.return_this;
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102 assert( method_deferred === obj.return_this );
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103 assert( method_deferred() !== obj.return_this() );
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104
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105 // The two outcomes, precisely stated.
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106 assert( obj.return_this() === obj );
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107 assert( method_deferred().telltail === 'global' );
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108
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109 });
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110 // end transient-bind
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111
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112
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113 // start millers-device
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114 TEST('millers-device', function()
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115 {
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116 var array = [];
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117 var obj = {};
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118 var fn = function(){};
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119
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120 assert( typeof array === 'object' );
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121 assert( '' + obj === '[object Object]' );
139
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122
138
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123 assert( obj.toString() === '[object Object]' );
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124
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125 var object_toString = obj.toString;
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126
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127 assert( object_toString.call(array) === '[object Array]' );
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128 assert( object_toString.call(fn) === '[object Function]' );
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129
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130 });
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131 // end millers-device
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132
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133
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134 // start return_arguments
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135 TEST('return_arguments', function()
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136 {
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137 var return_arguments = function(){
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138 return arguments;
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139 };
139
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140
138
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141 var my_arguments = return_arguments(0, 1);
139
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142
138
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143 assert( my_arguments.length === 2 );
139
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144
138
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145 assert( my_arguments[0] === 0 );
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146 assert( my_arguments[1] === 1 );
139
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147
138
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148 assert( '' + my_arguments === '[object Object]' );
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149 assert( '' + [0, 1] === '0,1' );
139
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150
138
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151 var array_slice = [].slice;
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152 var my_arguments_fixed = array_slice.call( my_arguments );
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153
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154 assert( '' + my_arguments_fixed === '0,1');
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155
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156 var obj = {};
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157 assert( obj.toString.call( my_arguments_fixed ) === '[object Array]' );
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158
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159 });
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160 // end return_arguments
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161
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162
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163 // start new-operator
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164 TEST('new-operator', function()
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165 {
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166 var this_in_Fn;
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167
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168 var Fn = function(){
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169 this_in_Fn = this;
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170 };
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171
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172 this_in_Fn = null;
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173 var non_instance = Fn();
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174 assert( non_instance === undefined );
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175 assert( this_in_Fn.telltail === 'global');
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176
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177 this_in_Fn = null;
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178 var instance = new Fn();
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179 assert( instance === this_in_Fn );
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180 assert( instance.telltail === undefined );
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181
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182 Fn.prototype.telltail = 'instance-of-Fn';
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183 assert( instance.telltail === 'instance-of-Fn' );
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184
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185 Fn.prototype = {
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186 telltail : 'prototype-is-changed'
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187 };
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188 var second_instance = new Fn();
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189 assert( second_instance.telltail === 'prototype-is-changed' );
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190
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191 Fn.prototype = second_instance;
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192 second_instance.i = 42;
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193
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194 var third_instance = new Fn();
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195 assert( third_instance.telltail === 'prototype-is-changed' );
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196 assert( third_instance.i === 42 );
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197
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198 });
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199 // end new-operator