1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 | (function (isNode) {
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8 | "use strict";
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9 | var SYNTAX,
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10 | nodeType,
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11 | ESP = isNode ? require('esprima') : esprima,
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12 | ESPGEN = isNode ? require('escodegen') : escodegen,
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13 | crypto = isNode ? require('crypto') : null,
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14 | LEADER_WRAP = '(function () { ',
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15 | TRAILER_WRAP = '\n}());',
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16 | COMMENT_RE = /^\s*istanbul\s+ignore\s+(if|else|next)(?=\W|$)/,
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17 | astgen,
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18 | preconditions,
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19 | cond,
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20 | isArray = Array.isArray;
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21 |
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22 |
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23 | if (!isArray) {
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24 | isArray = function (thing) { return thing && Object.prototype.toString.call(thing) === '[object Array]'; };
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25 | }
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26 |
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27 | if (!isNode) {
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28 | preconditions = {
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29 | 'Could not find esprima': ESP,
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30 | 'Could not find escodegen': ESPGEN,
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31 | 'JSON object not in scope': JSON,
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32 | 'Array does not implement push': [].push,
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33 | 'Array does not implement unshift': [].unshift
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34 | };
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35 |
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36 | for (cond in preconditions) {
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37 | if (preconditions.hasOwnProperty(cond)) {
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38 | if (!preconditions[cond]) { throw new Error(cond); }
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39 | }
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40 | }
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41 | }
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42 |
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43 | function generateTrackerVar(filename, omitSuffix) {
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44 | var hash, suffix;
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45 | if (crypto !== null) {
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46 | hash = crypto.createHash('md5');
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47 | hash.update(filename);
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48 | suffix = hash.digest('base64');
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49 |
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50 | suffix = suffix.replace(new RegExp('=', 'g'), '')
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51 | .replace(new RegExp('\\+', 'g'), '_')
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52 | .replace(new RegExp('/', 'g'), '$');
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53 | } else {
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54 | window.__cov_seq = window.__cov_seq || 0;
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55 | window.__cov_seq += 1;
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56 | suffix = window.__cov_seq;
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57 | }
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58 | return '__cov_' + (omitSuffix ? '' : suffix);
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59 | }
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60 |
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61 | function pushAll(ary, thing) {
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62 | if (!isArray(thing)) {
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63 | thing = [ thing ];
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64 | }
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65 | Array.prototype.push.apply(ary, thing);
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66 | }
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67 |
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68 | SYNTAX = {
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69 | ArrayExpression: [ 'elements' ],
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70 | AssignmentExpression: ['left', 'right'],
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71 | BinaryExpression: ['left', 'right' ],
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72 | BlockStatement: [ 'body' ],
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73 | BreakStatement: [ 'label' ],
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74 | CallExpression: [ 'callee', 'arguments'],
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75 | CatchClause: ['param', 'body'],
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76 | ConditionalExpression: [ 'test', 'consequent', 'alternate' ],
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77 | ContinueStatement: [ 'label' ],
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78 | DebuggerStatement: [ ],
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79 | DoWhileStatement: [ 'body', 'test' ],
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80 | EmptyStatement: [],
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81 | ExpressionStatement: [ 'expression'],
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82 | ForInStatement: [ 'left', 'right', 'body' ],
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83 | ForStatement: ['init', 'test', 'update', 'body' ],
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84 | FunctionDeclaration: ['id', 'params', 'body'],
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85 | FunctionExpression: ['id', 'params', 'defaults', 'body'],
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86 | Identifier: [],
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87 | IfStatement: ['test', 'consequent', 'alternate'],
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88 | LabeledStatement: ['label', 'body'],
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89 | Literal: [],
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90 | LogicalExpression: [ 'left', 'right' ],
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91 | MemberExpression: ['object', 'property'],
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92 | NewExpression: ['callee', 'arguments'],
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93 | ObjectExpression: [ 'properties' ],
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94 | Program: [ 'body' ],
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95 | Property: [ 'key', 'value'],
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96 | ReturnStatement: ['argument'],
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97 | SequenceExpression: ['expressions'],
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98 | SwitchCase: [ 'test', 'consequent' ],
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99 | SwitchStatement: ['discriminant', 'cases' ],
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100 | ThisExpression: [],
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101 | ThrowStatement: ['argument'],
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102 | TryStatement: [ 'block', 'handlers', 'finalizer' ],
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103 | UnaryExpression: ['argument'],
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104 | UpdateExpression: [ 'argument' ],
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105 | VariableDeclaration: [ 'declarations' ],
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106 | VariableDeclarator: [ 'id', 'init' ],
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107 | WhileStatement: [ 'test', 'body' ],
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108 | WithStatement: [ 'object', 'body' ]
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109 |
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110 | };
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111 |
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112 | for (nodeType in SYNTAX) {
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113 |
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114 | if (SYNTAX.hasOwnProperty(nodeType)) {
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115 | SYNTAX[nodeType] = { name: nodeType, children: SYNTAX[nodeType] };
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116 | }
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117 | }
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118 |
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119 | astgen = {
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120 | variable: function (name) { return { type: SYNTAX.Identifier.name, name: name }; },
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121 | stringLiteral: function (str) { return { type: SYNTAX.Literal.name, value: String(str) }; },
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122 | numericLiteral: function (num) { return { type: SYNTAX.Literal.name, value: Number(num) }; },
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123 | statement: function (contents) { return { type: SYNTAX.ExpressionStatement.name, expression: contents }; },
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124 | dot: function (obj, field) { return { type: SYNTAX.MemberExpression.name, computed: false, object: obj, property: field }; },
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125 | subscript: function (obj, sub) { return { type: SYNTAX.MemberExpression.name, computed: true, object: obj, property: sub }; },
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126 | postIncrement: function (obj) { return { type: SYNTAX.UpdateExpression.name, operator: '++', prefix: false, argument: obj }; },
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127 | sequence: function (one, two) { return { type: SYNTAX.SequenceExpression.name, expressions: [one, two] }; }
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128 | };
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129 |
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130 | function Walker(walkMap, preprocessor, scope, debug) {
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131 | this.walkMap = walkMap;
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132 | this.preprocessor = preprocessor;
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133 | this.scope = scope;
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134 | this.debug = debug;
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135 | if (this.debug) {
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136 | this.level = 0;
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137 | this.seq = true;
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138 | }
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139 | }
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140 |
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141 | function defaultWalker(node, walker) {
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142 |
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143 | var type = node.type,
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144 | preprocessor,
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145 | postprocessor,
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146 | children = SYNTAX[type].children,
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147 |
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148 | applyCustomWalker = !!node.loc || node.type === SYNTAX.Program.name,
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149 | walkerFn = applyCustomWalker ? walker.walkMap[type] : null,
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150 | i,
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151 | j,
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152 | walkFnIndex,
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153 | childType,
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154 | childNode,
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155 | ret,
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156 | childArray,
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157 | childElement,
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158 | pathElement,
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159 | assignNode,
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160 | isLast;
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161 |
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162 |
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163 | if (node.walking) { throw new Error('Infinite regress: Custom walkers may NOT call walker.apply(node)'); }
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164 | node.walking = true;
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165 |
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166 | ret = walker.apply(node, walker.preprocessor);
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167 |
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168 | preprocessor = ret.preprocessor;
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169 | if (preprocessor) {
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170 | delete ret.preprocessor;
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171 | ret = walker.apply(node, preprocessor);
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172 | }
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173 |
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174 | if (isArray(walkerFn)) {
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175 | for (walkFnIndex = 0; walkFnIndex < walkerFn.length; walkFnIndex += 1) {
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176 | isLast = walkFnIndex === walkerFn.length - 1;
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177 | ret = walker.apply(ret, walkerFn[walkFnIndex]);
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178 |
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179 | if (ret.type !== type && !isLast) {
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180 | throw new Error('Only the last walker is allowed to change the node type: [type was: ' + type + ' ]');
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181 | }
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182 | }
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183 | } else {
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184 | if (walkerFn) {
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185 | ret = walker.apply(node, walkerFn);
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186 | }
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187 | }
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188 |
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189 | for (i = 0; i < children.length; i += 1) {
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190 | childType = children[i];
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191 | childNode = node[childType];
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192 | if (childNode && !childNode.skipWalk) {
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193 | pathElement = { node: node, property: childType };
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194 | if (isArray(childNode)) {
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195 | childArray = [];
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196 | for (j = 0; j < childNode.length; j += 1) {
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197 | childElement = childNode[j];
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198 | pathElement.index = j;
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199 | if (childElement) {
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200 | assignNode = walker.apply(childElement, null, pathElement);
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201 | if (isArray(assignNode.prepend)) {
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202 | pushAll(childArray, assignNode.prepend);
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203 | delete assignNode.prepend;
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204 | }
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205 | }
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206 | pushAll(childArray, assignNode);
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207 | }
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208 | node[childType] = childArray;
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209 | } else {
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210 | assignNode = walker.apply(childNode, null, pathElement);
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211 |
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212 | if (isArray(assignNode.prepend)) {
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213 | throw new Error('Internal error: attempt to prepend statements in disallowed (non-array) context');
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214 | |
215 |
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216 |
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217 |
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218 |
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219 |
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220 |
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221 | } else {
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222 | node[childType] = assignNode;
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223 | }
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224 | }
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225 | }
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226 | }
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227 |
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228 | postprocessor = ret.postprocessor;
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229 | if (postprocessor) {
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230 | delete ret.postprocessor;
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231 | ret = walker.apply(ret, postprocessor);
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232 | }
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233 |
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234 | delete node.walking;
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235 |
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236 | return ret;
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237 | }
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238 |
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239 | Walker.prototype = {
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240 | startWalk: function (node) {
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241 | this.path = [];
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242 | this.apply(node);
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243 | },
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244 |
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245 | apply: function (node, walkFn, pathElement) {
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246 | var ret, i, seq, prefix;
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247 |
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248 | walkFn = walkFn || defaultWalker;
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249 | if (this.debug) {
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250 | this.seq += 1;
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251 | this.level += 1;
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252 | seq = this.seq;
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253 | prefix = '';
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254 | for (i = 0; i < this.level; i += 1) { prefix += ' '; }
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255 | console.log(prefix + 'Enter (' + seq + '):' + node.type);
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256 | }
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257 | if (pathElement) { this.path.push(pathElement); }
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258 | ret = walkFn.call(this.scope, node, this);
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259 | if (pathElement) { this.path.pop(); }
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260 | if (this.debug) {
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261 | this.level -= 1;
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262 | console.log(prefix + 'Return (' + seq + '):' + node.type);
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263 | }
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264 | return ret || node;
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265 | },
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266 |
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267 | startLineForNode: function (node) {
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268 | return node && node.loc && node.loc.start ? node.loc.start.line : null;
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269 | },
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270 |
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271 | ancestor: function (n) {
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272 | return this.path.length > n - 1 ? this.path[this.path.length - n] : null;
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273 | },
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274 |
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275 | parent: function () {
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276 | return this.ancestor(1);
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277 | },
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278 |
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279 | isLabeled: function () {
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280 | var el = this.parent();
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281 | return el && el.node.type === SYNTAX.LabeledStatement.name;
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282 | }
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283 | };
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284 |
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285 | |
286 |
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287 |
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288 |
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289 |
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290 |
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291 |
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292 |
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293 |
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294 |
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295 |
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296 |
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297 |
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298 |
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299 |
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300 |
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301 |
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302 |
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303 |
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304 |
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305 |
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306 |
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307 |
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308 |
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309 |
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310 |
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311 |
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312 |
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313 |
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314 |
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316 |
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317 |
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318 |
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319 |
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320 |
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321 |
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324 |
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325 |
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326 |
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327 |
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328 |
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329 |
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330 |
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331 |
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332 |
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333 |
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334 |
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335 |
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336 | function Instrumenter(options) {
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337 | this.opts = options || {
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338 | debug: false,
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339 | walkDebug: false,
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340 | coverageVariable: '__coverage__',
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341 | codeGenerationOptions: undefined,
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342 | noAutoWrap: false,
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343 | noCompact: false,
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344 | embedSource: false,
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345 | preserveComments: false
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346 | };
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347 |
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348 | this.walker = new Walker({
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349 | ExpressionStatement: this.coverStatement,
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350 | BreakStatement: this.coverStatement,
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351 | ContinueStatement: this.coverStatement,
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352 | DebuggerStatement: this.coverStatement,
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353 | ReturnStatement: this.coverStatement,
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354 | ThrowStatement: this.coverStatement,
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355 | TryStatement: this.coverStatement,
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356 | VariableDeclaration: this.coverStatement,
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357 | IfStatement: [ this.ifBlockConverter, this.coverStatement, this.ifBranchInjector ],
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358 | ForStatement: [ this.skipInit, this.loopBlockConverter, this.coverStatement ],
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359 | ForInStatement: [ this.skipLeft, this.loopBlockConverter, this.coverStatement ],
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360 | WhileStatement: [ this.loopBlockConverter, this.coverStatement ],
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361 | DoWhileStatement: [ this.loopBlockConverter, this.coverStatement ],
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362 | SwitchStatement: [ this.coverStatement, this.switchBranchInjector ],
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363 | SwitchCase: [ this.switchCaseInjector ],
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364 | WithStatement: [ this.withBlockConverter, this.coverStatement ],
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365 | FunctionDeclaration: [ this.coverFunction, this.coverStatement ],
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366 | FunctionExpression: this.coverFunction,
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367 | LabeledStatement: this.coverStatement,
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368 | ConditionalExpression: this.conditionalBranchInjector,
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369 | LogicalExpression: this.logicalExpressionBranchInjector,
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370 | ObjectExpression: this.maybeAddType
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371 | }, this.extractCurrentHint, this, this.opts.walkDebug);
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372 |
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373 |
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374 | if (this.opts.backdoor && this.opts.backdoor.omitTrackerSuffix) {
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375 | this.omitTrackerSuffix = true;
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376 | }
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377 | }
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378 |
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379 | Instrumenter.prototype = {
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380 | |
381 |
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382 |
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383 |
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384 |
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385 |
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386 |
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387 |
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388 |
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389 | instrumentSync: function (code, filename) {
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390 | var program;
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391 |
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392 |
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393 | if (typeof code !== 'string') { throw new Error('Code must be string'); }
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394 | if (code.charAt(0) === '#') {
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395 | code = '//' + code;
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396 | }
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397 | if (!this.opts.noAutoWrap) {
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398 | code = LEADER_WRAP + code + TRAILER_WRAP;
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399 | }
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400 | program = ESP.parse(code, {
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401 | loc: true,
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402 | range: true,
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403 | tokens: this.opts.preserveComments,
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404 | comment: true
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405 | });
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406 | if (this.opts.preserveComments) {
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407 | program = ESPGEN.attachComments(program, program.comments, program.tokens);
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408 | }
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409 | if (!this.opts.noAutoWrap) {
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410 | program = {
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411 | type: SYNTAX.Program.name,
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412 | body: program.body[0].expression.callee.body.body,
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413 | comments: program.comments
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414 | };
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415 | }
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416 | return this.instrumentASTSync(program, filename, code);
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417 | },
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418 | filterHints: function (comments) {
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419 | var ret = [],
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420 | i,
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421 | comment,
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422 | groups;
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423 | if (!(comments && isArray(comments))) {
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424 | return ret;
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425 | }
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426 | for (i = 0; i < comments.length; i += 1) {
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427 | comment = comments[i];
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428 |
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429 | if (comment && comment.value && comment.range && isArray(comment.range)) {
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430 | groups = String(comment.value).match(COMMENT_RE);
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431 | if (groups) {
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432 | ret.push({ type: groups[1], start: comment.range[0], end: comment.range[1] });
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433 | }
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434 | }
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435 | }
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436 | return ret;
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437 | },
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438 | extractCurrentHint: function (node) {
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439 | if (!node.range) { return; }
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440 | var i = this.currentState.lastHintPosition + 1,
|
441 | hints = this.currentState.hints,
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442 | nodeStart = node.range[0],
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443 | hint;
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444 | this.currentState.currentHint = null;
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445 | while (i < hints.length) {
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446 | hint = hints[i];
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447 | if (hint.end < nodeStart) {
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448 | this.currentState.currentHint = hint;
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449 | this.currentState.lastHintPosition = i;
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450 | i += 1;
|
451 | } else {
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452 | break;
|
453 | }
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454 | }
|
455 | },
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456 | |
457 |
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458 |
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459 |
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460 |
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461 |
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462 |
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463 |
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464 |
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465 |
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466 |
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467 | instrumentASTSync: function (program, filename, originalCode) {
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468 | var usingStrict = false,
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469 | codegenOptions,
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470 | generated,
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471 | preamble,
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472 | lineCount,
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473 | i;
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474 | filename = filename || String(new Date().getTime()) + '.js';
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475 | this.sourceMap = null;
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476 | this.coverState = {
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477 | path: filename,
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478 | s: {},
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479 | b: {},
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480 | f: {},
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481 | fnMap: {},
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482 | statementMap: {},
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483 | branchMap: {}
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484 | };
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485 | this.currentState = {
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486 | trackerVar: generateTrackerVar(filename, this.omitTrackerSuffix),
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487 | func: 0,
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488 | branch: 0,
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489 | variable: 0,
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490 | statement: 0,
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491 | hints: this.filterHints(program.comments),
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492 | currentHint: null,
|
493 | lastHintPosition: -1,
|
494 | ignoring: 0
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495 | };
|
496 | if (program.body && program.body.length > 0 && this.isUseStrictExpression(program.body[0])) {
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497 |
|
498 | program.body.shift();
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499 |
|
500 | usingStrict = true;
|
501 | }
|
502 | this.walker.startWalk(program);
|
503 | codegenOptions = this.opts.codeGenerationOptions || { format: { compact: !this.opts.noCompact }};
|
504 | codegenOptions.comment = this.opts.preserveComments;
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505 |
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506 |
|
507 | generated = ESPGEN.generate(program, codegenOptions);
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508 | preamble = this.getPreamble(originalCode || '', usingStrict);
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509 |
|
510 | if (generated.map && generated.code) {
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511 | lineCount = preamble.split(/\r\n|\r|\n/).length;
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512 |
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513 | for (i = 0; i < generated.map._mappings.length; i += 1) {
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514 | generated.map._mappings[i].generatedLine += lineCount;
|
515 | }
|
516 | this.sourceMap = generated.map;
|
517 | generated = generated.code;
|
518 | }
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519 |
|
520 | return preamble + '\n' + generated + '\n';
|
521 | },
|
522 | |
523 |
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524 |
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525 |
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526 |
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527 |
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528 |
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529 |
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530 |
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531 |
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532 |
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533 |
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534 |
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535 | instrument: function (code, filename, callback) {
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536 |
|
537 | if (!callback && typeof filename === 'function') {
|
538 | callback = filename;
|
539 | filename = null;
|
540 | }
|
541 | try {
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542 | callback(null, this.instrumentSync(code, filename));
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543 | } catch (ex) {
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544 | callback(ex);
|
545 | }
|
546 | },
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547 | |
548 |
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549 |
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550 |
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551 |
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552 |
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553 |
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554 |
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555 |
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556 |
|
557 | lastFileCoverage: function () {
|
558 | return this.coverState;
|
559 | },
|
560 | |
561 |
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562 |
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563 |
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564 |
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565 |
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566 |
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567 | lastSourceMap: function () {
|
568 | return this.sourceMap;
|
569 | },
|
570 | fixColumnPositions: function (coverState) {
|
571 | var offset = LEADER_WRAP.length,
|
572 | fixer = function (loc) {
|
573 | if (loc.start.line === 1) {
|
574 | loc.start.column -= offset;
|
575 | }
|
576 | if (loc.end.line === 1) {
|
577 | loc.end.column -= offset;
|
578 | }
|
579 | },
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580 | k,
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581 | obj,
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582 | i,
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583 | locations;
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584 |
|
585 | obj = coverState.statementMap;
|
586 | for (k in obj) {
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587 |
|
588 | if (obj.hasOwnProperty(k)) { fixer(obj[k]); }
|
589 | }
|
590 | obj = coverState.fnMap;
|
591 | for (k in obj) {
|
592 |
|
593 | if (obj.hasOwnProperty(k)) { fixer(obj[k].loc); }
|
594 | }
|
595 | obj = coverState.branchMap;
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596 | for (k in obj) {
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597 |
|
598 | if (obj.hasOwnProperty(k)) {
|
599 | locations = obj[k].locations;
|
600 | for (i = 0; i < locations.length; i += 1) {
|
601 | fixer(locations[i]);
|
602 | }
|
603 | }
|
604 | }
|
605 | },
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606 |
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607 | getPreamble: function (sourceCode, emitUseStrict) {
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608 | var varName = this.opts.coverageVariable || '__coverage__',
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609 | file = this.coverState.path.replace(/\\/g, '\\\\'),
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610 | tracker = this.currentState.trackerVar,
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611 | coverState,
|
612 | strictLine = emitUseStrict ? '"use strict";' : '',
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613 |
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614 |
|
615 | replacer = function (s) {
|
616 | return function () { return s; };
|
617 | },
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618 | code;
|
619 | if (!this.opts.noAutoWrap) {
|
620 | this.fixColumnPositions(this.coverState);
|
621 | }
|
622 | if (this.opts.embedSource) {
|
623 | this.coverState.code = sourceCode.split(/(?:\r?\n)|\r/);
|
624 | }
|
625 | coverState = this.opts.debug ? JSON.stringify(this.coverState, undefined, 4) : JSON.stringify(this.coverState);
|
626 | code = [
|
627 | "%STRICT%",
|
628 | "var %VAR% = (Function('return this'))();",
|
629 | "if (!%VAR%.%GLOBAL%) { %VAR%.%GLOBAL% = {}; }",
|
630 | "%VAR% = %VAR%.%GLOBAL%;",
|
631 | "if (!(%VAR%['%FILE%'])) {",
|
632 | " %VAR%['%FILE%'] = %OBJECT%;",
|
633 | "}",
|
634 | "%VAR% = %VAR%['%FILE%'];"
|
635 | ].join("\n")
|
636 | .replace(/%STRICT%/g, replacer(strictLine))
|
637 | .replace(/%VAR%/g, replacer(tracker))
|
638 | .replace(/%GLOBAL%/g, replacer(varName))
|
639 | .replace(/%FILE%/g, replacer(file))
|
640 | .replace(/%OBJECT%/g, replacer(coverState));
|
641 | return code;
|
642 | },
|
643 |
|
644 | startIgnore: function () {
|
645 | this.currentState.ignoring += 1;
|
646 | },
|
647 |
|
648 | endIgnore: function () {
|
649 | this.currentState.ignoring -= 1;
|
650 | },
|
651 |
|
652 | convertToBlock: function (node) {
|
653 | if (!node) {
|
654 | return { type: 'BlockStatement', body: [] };
|
655 | } else if (node.type === 'BlockStatement') {
|
656 | return node;
|
657 | } else {
|
658 | return { type: 'BlockStatement', body: [ node ] };
|
659 | }
|
660 | },
|
661 |
|
662 | ifBlockConverter: function (node) {
|
663 | node.consequent = this.convertToBlock(node.consequent);
|
664 | node.alternate = this.convertToBlock(node.alternate);
|
665 | },
|
666 |
|
667 | loopBlockConverter: function (node) {
|
668 | node.body = this.convertToBlock(node.body);
|
669 | },
|
670 |
|
671 | withBlockConverter: function (node) {
|
672 | node.body = this.convertToBlock(node.body);
|
673 | },
|
674 |
|
675 | statementName: function (location, initValue) {
|
676 | var sName,
|
677 | ignoring = !!this.currentState.ignoring;
|
678 |
|
679 | location.skip = ignoring || undefined;
|
680 | initValue = initValue || 0;
|
681 | this.currentState.statement += 1;
|
682 | sName = this.currentState.statement;
|
683 | this.coverState.statementMap[sName] = location;
|
684 | this.coverState.s[sName] = initValue;
|
685 | return sName;
|
686 | },
|
687 |
|
688 | skipInit: function (node /*, walker */) {
|
689 | if (node.init) {
|
690 | node.init.skipWalk = true;
|
691 | }
|
692 | },
|
693 |
|
694 | skipLeft: function (node /*, walker */) {
|
695 | node.left.skipWalk = true;
|
696 | },
|
697 |
|
698 | isUseStrictExpression: function (node) {
|
699 | return node && node.type === SYNTAX.ExpressionStatement.name &&
|
700 | node.expression && node.expression.type === SYNTAX.Literal.name &&
|
701 | node.expression.value === 'use strict';
|
702 | },
|
703 |
|
704 | maybeSkipNode: function (node, type) {
|
705 | var alreadyIgnoring = !!this.currentState.ignoring,
|
706 | hint = this.currentState.currentHint,
|
707 | ignoreThis = !alreadyIgnoring && hint && hint.type === type;
|
708 |
|
709 | if (ignoreThis) {
|
710 | this.startIgnore();
|
711 | node.postprocessor = this.endIgnore;
|
712 | return true;
|
713 | }
|
714 | return false;
|
715 | },
|
716 |
|
717 | coverStatement: function (node, walker) {
|
718 | var sName,
|
719 | incrStatementCount,
|
720 | grandParent;
|
721 |
|
722 | this.maybeSkipNode(node, 'next');
|
723 |
|
724 | if (this.isUseStrictExpression(node)) {
|
725 | grandParent = walker.ancestor(2);
|
726 |
|
727 | if (grandParent) {
|
728 | if ((grandParent.node.type === SYNTAX.FunctionExpression.name ||
|
729 | grandParent.node.type === SYNTAX.FunctionDeclaration.name) &&
|
730 | walker.parent().node.body[0] === node) {
|
731 | return;
|
732 | }
|
733 | }
|
734 | }
|
735 | if (node.type === SYNTAX.FunctionDeclaration.name) {
|
736 | sName = this.statementName(node.loc, 1);
|
737 | } else {
|
738 | sName = this.statementName(node.loc);
|
739 | incrStatementCount = astgen.statement(
|
740 | astgen.postIncrement(
|
741 | astgen.subscript(
|
742 | astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('s')),
|
743 | astgen.stringLiteral(sName)
|
744 | )
|
745 | )
|
746 | );
|
747 | this.splice(incrStatementCount, node, walker);
|
748 | }
|
749 | },
|
750 |
|
751 | splice: function (statements, node, walker) {
|
752 | var targetNode = walker.isLabeled() ? walker.parent().node : node;
|
753 | targetNode.prepend = targetNode.prepend || [];
|
754 | pushAll(targetNode.prepend, statements);
|
755 | },
|
756 |
|
757 | functionName: function (node, line, location) {
|
758 | this.currentState.func += 1;
|
759 | var id = this.currentState.func,
|
760 | ignoring = !!this.currentState.ignoring,
|
761 | name = node.id ? node.id.name : '(anonymous_' + id + ')';
|
762 | this.coverState.fnMap[id] = { name: name, line: line, loc: location, skip: ignoring || undefined };
|
763 | this.coverState.f[id] = 0;
|
764 | return id;
|
765 | },
|
766 |
|
767 | coverFunction: function (node, walker) {
|
768 | var id,
|
769 | body = node.body,
|
770 | blockBody = body.body,
|
771 | popped;
|
772 |
|
773 | this.maybeSkipNode(node, 'next');
|
774 |
|
775 | id = this.functionName(node, walker.startLineForNode(node), {
|
776 | start: node.loc.start,
|
777 | end: { line: node.body.loc.start.line, column: node.body.loc.start.column }
|
778 | });
|
779 |
|
780 | if (blockBody.length > 0 && this.isUseStrictExpression(blockBody[0])) {
|
781 | popped = blockBody.shift();
|
782 | }
|
783 | blockBody.unshift(
|
784 | astgen.statement(
|
785 | astgen.postIncrement(
|
786 | astgen.subscript(
|
787 | astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('f')),
|
788 | astgen.stringLiteral(id)
|
789 | )
|
790 | )
|
791 | )
|
792 | );
|
793 | if (popped) {
|
794 | blockBody.unshift(popped);
|
795 | }
|
796 | },
|
797 |
|
798 | branchName: function (type, startLine, pathLocations) {
|
799 | var bName,
|
800 | paths = [],
|
801 | locations = [],
|
802 | i,
|
803 | ignoring = !!this.currentState.ignoring;
|
804 | this.currentState.branch += 1;
|
805 | bName = this.currentState.branch;
|
806 | for (i = 0; i < pathLocations.length; i += 1) {
|
807 | pathLocations[i].skip = pathLocations[i].skip || ignoring || undefined;
|
808 | locations.push(pathLocations[i]);
|
809 | paths.push(0);
|
810 | }
|
811 | this.coverState.b[bName] = paths;
|
812 | this.coverState.branchMap[bName] = { line: startLine, type: type, locations: locations };
|
813 | return bName;
|
814 | },
|
815 |
|
816 | branchIncrementExprAst: function (varName, branchIndex, down) {
|
817 | var ret = astgen.postIncrement(
|
818 | astgen.subscript(
|
819 | astgen.subscript(
|
820 | astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('b')),
|
821 | astgen.stringLiteral(varName)
|
822 | ),
|
823 | astgen.numericLiteral(branchIndex)
|
824 | ),
|
825 | down
|
826 | );
|
827 | return ret;
|
828 | },
|
829 |
|
830 | locationsForNodes: function (nodes) {
|
831 | var ret = [],
|
832 | i;
|
833 | for (i = 0; i < nodes.length; i += 1) {
|
834 | ret.push(nodes[i].loc);
|
835 | }
|
836 | return ret;
|
837 | },
|
838 |
|
839 | ifBranchInjector: function (node, walker) {
|
840 | var alreadyIgnoring = !!this.currentState.ignoring,
|
841 | hint = this.currentState.currentHint,
|
842 | ignoreThen = !alreadyIgnoring && hint && hint.type === 'if',
|
843 | ignoreElse = !alreadyIgnoring && hint && hint.type === 'else',
|
844 | line = node.loc.start.line,
|
845 | col = node.loc.start.column,
|
846 | start = { line: line, column: col },
|
847 | end = { line: line, column: col },
|
848 | bName = this.branchName('if', walker.startLineForNode(node), [
|
849 | { start: start, end: end, skip: ignoreThen || undefined },
|
850 | { start: start, end: end, skip: ignoreElse || undefined }
|
851 | ]),
|
852 | thenBody = node.consequent.body,
|
853 | elseBody = node.alternate.body,
|
854 | child;
|
855 | thenBody.unshift(astgen.statement(this.branchIncrementExprAst(bName, 0)));
|
856 | elseBody.unshift(astgen.statement(this.branchIncrementExprAst(bName, 1)));
|
857 | if (ignoreThen) { child = node.consequent; child.preprocessor = this.startIgnore; child.postprocessor = this.endIgnore; }
|
858 | if (ignoreElse) { child = node.alternate; child.preprocessor = this.startIgnore; child.postprocessor = this.endIgnore; }
|
859 | },
|
860 |
|
861 | branchLocationFor: function (name, index) {
|
862 | return this.coverState.branchMap[name].locations[index];
|
863 | },
|
864 |
|
865 | switchBranchInjector: function (node, walker) {
|
866 | var cases = node.cases,
|
867 | bName,
|
868 | i;
|
869 |
|
870 | if (!(cases && cases.length > 0)) {
|
871 | return;
|
872 | }
|
873 | bName = this.branchName('switch', walker.startLineForNode(node), this.locationsForNodes(cases));
|
874 | for (i = 0; i < cases.length; i += 1) {
|
875 | cases[i].branchLocation = this.branchLocationFor(bName, i);
|
876 | cases[i].consequent.unshift(astgen.statement(this.branchIncrementExprAst(bName, i)));
|
877 | }
|
878 | },
|
879 |
|
880 | switchCaseInjector: function (node) {
|
881 | var location = node.branchLocation;
|
882 | delete node.branchLocation;
|
883 | if (this.maybeSkipNode(node, 'next')) {
|
884 | location.skip = true;
|
885 | }
|
886 | },
|
887 |
|
888 | conditionalBranchInjector: function (node, walker) {
|
889 | var bName = this.branchName('cond-expr', walker.startLineForNode(node), this.locationsForNodes([ node.consequent, node.alternate ])),
|
890 | ast1 = this.branchIncrementExprAst(bName, 0),
|
891 | ast2 = this.branchIncrementExprAst(bName, 1);
|
892 |
|
893 | node.consequent.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, 0));
|
894 | node.alternate.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, 1));
|
895 | node.consequent = astgen.sequence(ast1, node.consequent);
|
896 | node.alternate = astgen.sequence(ast2, node.alternate);
|
897 | },
|
898 |
|
899 | maybeAddSkip: function (branchLocation) {
|
900 | return function (node) {
|
901 | var alreadyIgnoring = !!this.currentState.ignoring,
|
902 | hint = this.currentState.currentHint,
|
903 | ignoreThis = !alreadyIgnoring && hint && hint.type === 'next';
|
904 | if (ignoreThis) {
|
905 | this.startIgnore();
|
906 | node.postprocessor = this.endIgnore;
|
907 | }
|
908 | if (ignoreThis || alreadyIgnoring) {
|
909 | branchLocation.skip = true;
|
910 | }
|
911 | };
|
912 | },
|
913 |
|
914 | logicalExpressionBranchInjector: function (node, walker) {
|
915 | var parent = walker.parent(),
|
916 | leaves = [],
|
917 | bName,
|
918 | tuple,
|
919 | i;
|
920 |
|
921 | this.maybeSkipNode(node, 'next');
|
922 |
|
923 | if (parent && parent.node.type === SYNTAX.LogicalExpression.name) {
|
924 |
|
925 | return;
|
926 | }
|
927 |
|
928 | this.findLeaves(node, leaves);
|
929 | bName = this.branchName('binary-expr',
|
930 | walker.startLineForNode(node),
|
931 | this.locationsForNodes(leaves.map(function (item) { return item.node; }))
|
932 | );
|
933 | for (i = 0; i < leaves.length; i += 1) {
|
934 | tuple = leaves[i];
|
935 | tuple.parent[tuple.property] = astgen.sequence(this.branchIncrementExprAst(bName, i), tuple.node);
|
936 | tuple.node.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, i));
|
937 | }
|
938 | },
|
939 |
|
940 | findLeaves: function (node, accumulator, parent, property) {
|
941 | if (node.type === SYNTAX.LogicalExpression.name) {
|
942 | this.findLeaves(node.left, accumulator, node, 'left');
|
943 | this.findLeaves(node.right, accumulator, node, 'right');
|
944 | } else {
|
945 | accumulator.push({ node: node, parent: parent, property: property });
|
946 | }
|
947 | },
|
948 | maybeAddType: function (node /*, walker */) {
|
949 | var props = node.properties,
|
950 | i,
|
951 | child;
|
952 | for (i = 0; i < props.length; i += 1) {
|
953 | child = props[i];
|
954 | if (!child.type) {
|
955 | child.type = SYNTAX.Property.name;
|
956 | }
|
957 | }
|
958 | }
|
959 | };
|
960 |
|
961 | if (isNode) {
|
962 | module.exports = Instrumenter;
|
963 | } else {
|
964 | window.Instrumenter = Instrumenter;
|
965 | }
|
966 |
|
967 | }(typeof module !== 'undefined' && typeof module.exports !== 'undefined' && typeof exports !== 'undefined'));
|
968 |
|