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1 /**
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2 * Helper to test CodeMirror highlighting modes. It pretty prints output of the
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3 * highlighter and can check against expected styles.
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4 *
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5 * Mode tests are registered by calling test.mode(testName, mode,
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6 * tokens), where mode is a mode object as returned by
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7 * CodeMirror.getMode, and tokens is an array of lines that make up
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8 * the test.
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9 *
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10 * These lines are strings, in which styled stretches of code are
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11 * enclosed in brackets `[]`, and prefixed by their style. For
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12 * example, `[keyword if]`. Brackets in the code itself must be
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13 * duplicated to prevent them from being interpreted as token
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14 * boundaries. For example `a[[i]]` for `a[i]`. If a token has
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15 * multiple styles, the styles must be separated by ampersands, for
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16 * example `[tag&error </hmtl>]`.
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17 *
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18 * See the test.js files in the css, markdown, gfm, and stex mode
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19 * directories for examples.
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20 */
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21 (function() {
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22 function findSingle(str, pos, ch) {
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23 for (;;) {
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24 var found = str.indexOf(ch, pos);
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25 if (found == -1) return null;
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26 if (str.charAt(found + 1) != ch) return found;
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27 pos = found + 2;
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28 }
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29 }
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30
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31 var styleName = /[\w&-_]+/g;
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32 function parseTokens(strs) {
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33 var tokens = [], plain = "";
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34 for (var i = 0; i < strs.length; ++i) {
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35 if (i) plain += "\n";
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36 var str = strs[i], pos = 0;
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37 while (pos < str.length) {
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38 var style = null, text;
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39 if (str.charAt(pos) == "[" && str.charAt(pos+1) != "[") {
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40 styleName.lastIndex = pos + 1;
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41 var m = styleName.exec(str);
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42 style = m[0].replace(/&/g, " ");
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43 var textStart = pos + style.length + 2;
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44 var end = findSingle(str, textStart, "]");
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45 if (end == null) throw new Error("Unterminated token at " + pos + " in '" + str + "'" + style);
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46 text = str.slice(textStart, end);
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47 pos = end + 1;
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48 } else {
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49 var end = findSingle(str, pos, "[");
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50 if (end == null) end = str.length;
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51 text = str.slice(pos, end);
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52 pos = end;
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53 }
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54 text = text.replace(/\[\[|\]\]/g, function(s) {return s.charAt(0);});
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55 tokens.push({style: style, text: text});
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56 plain += text;
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57 }
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58 }
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59 return {tokens: tokens, plain: plain};
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60 }
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61
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62 test.mode = function(name, mode, tokens, modeName) {
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63 var data = parseTokens(tokens);
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64 return test((modeName || mode.name) + "_" + name, function() {
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65 return compare(data.plain, data.tokens, mode);
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66 });
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67 };
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68
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69 function esc(str) {
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70 return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
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71 }
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72
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73 function compare(text, expected, mode) {
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74
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75 var expectedOutput = [];
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76 for (var i = 0; i < expected.length; ++i) {
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77 var sty = expected[i].style;
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78 if (sty && sty.indexOf(" ")) sty = sty.split(' ').sort().join(' ');
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79 expectedOutput.push({style: sty, text: expected[i].text});
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80 }
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81
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82 var observedOutput = highlight(text, mode);
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83
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84 var s = "";
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85 var diff = highlightOutputsDifferent(expectedOutput, observedOutput);
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86 if (diff != null) {
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87 s += '<div class="mt-test mt-fail">';
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88 s += '<pre>' + esc(text) + '</pre>';
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89 s += '<div class="cm-s-default">';
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90 s += 'expected:';
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91 s += prettyPrintOutputTable(expectedOutput, diff);
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92 s += 'observed: [<a onclick="this.parentElement.className+=\' mt-state-unhide\'">display states</a>]';
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93 s += prettyPrintOutputTable(observedOutput, diff);
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94 s += '</div>';
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95 s += '</div>';
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96 }
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97 if (observedOutput.indentFailures) {
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98 for (var i = 0; i < observedOutput.indentFailures.length; i++)
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99 s += "<div class='mt-test mt-fail'>" + esc(observedOutput.indentFailures[i]) + "</div>";
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100 }
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101 if (s) throw new Failure(s);
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102 }
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103
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104 function stringify(obj) {
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105 function replacer(key, obj) {
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106 if (typeof obj == "function") {
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107 var m = obj.toString().match(/function\s*[^\s(]*/);
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108 return m ? m[0] : "function";
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109 }
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110 return obj;
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111 }
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112 if (window.JSON && JSON.stringify)
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113 return JSON.stringify(obj, replacer, 2);
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114 return "[unsupported]"; // Fail safely if no native JSON.
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115 }
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116
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117 function highlight(string, mode) {
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118 var state = mode.startState();
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119
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120 var lines = string.replace(/\r\n/g,'\n').split('\n');
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121 var st = [], pos = 0;
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122 for (var i = 0; i < lines.length; ++i) {
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123 var line = lines[i], newLine = true;
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124 if (mode.indent) {
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125 var ws = line.match(/^\s*/)[0];
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126 var indent = mode.indent(state, line.slice(ws.length), line);
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127 if (indent != CodeMirror.Pass && indent != ws.length)
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128 (st.indentFailures || (st.indentFailures = [])).push(
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129 "Indentation of line " + (i + 1) + " is " + indent + " (expected " + ws.length + ")");
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130 }
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131 var stream = new CodeMirror.StringStream(line, 4, {
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132 lookAhead: function(n) { return lines[i + n] }
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133 });
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134 if (line == "" && mode.blankLine) mode.blankLine(state);
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135 /* Start copied code from CodeMirror.highlight */
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136 while (!stream.eol()) {
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137 for (var j = 0; j < 10 && stream.start >= stream.pos; j++)
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138 var compare = mode.token(stream, state);
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139 if (j == 10)
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140 throw new Failure("Failed to advance the stream." + stream.string + " " + stream.pos);
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141 var substr = stream.current();
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142 if (compare && compare.indexOf(" ") > -1) compare = compare.split(' ').sort().join(' ');
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143 stream.start = stream.pos;
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144 if (pos && st[pos-1].style == compare && !newLine) {
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145 st[pos-1].text += substr;
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146 } else if (substr) {
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147 st[pos++] = {style: compare, text: substr, state: stringify(state)};
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148 }
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149 // Give up when line is ridiculously long
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150 if (stream.pos > 5000) {
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151 st[pos++] = {style: null, text: this.text.slice(stream.pos)};
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152 break;
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153 }
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154 newLine = false;
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155 }
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156 }
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157
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158 return st;
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159 }
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160
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161 function highlightOutputsDifferent(o1, o2) {
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162 var minLen = Math.min(o1.length, o2.length);
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163 for (var i = 0; i < minLen; ++i)
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164 if (o1[i].style != o2[i].style || o1[i].text != o2[i].text) return i;
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165 if (o1.length > minLen || o2.length > minLen) return minLen;
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166 }
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167
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168 function prettyPrintOutputTable(output, diffAt) {
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169 var s = '<table class="mt-output">';
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170 s += '<tr>';
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171 for (var i = 0; i < output.length; ++i) {
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172 var style = output[i].style, val = output[i].text;
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173 s +=
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174 '<td class="mt-token"' + (i == diffAt ? " style='background: pink'" : "") + '>' +
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175 '<span class="cm-' + esc(String(style)) + '">' +
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176 esc(val.replace(/ /g,'\xb7')) + // ยท MIDDLE DOT
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177 '</span>' +
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178 '</td>';
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179 }
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180 s += '</tr><tr>';
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181 for (var i = 0; i < output.length; ++i) {
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182 s += '<td class="mt-style"><span>' + (output[i].style || null) + '</span></td>';
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183 }
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184 if(output[0].state) {
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185 s += '</tr><tr class="mt-state-row" title="State AFTER each token">';
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186 for (var i = 0; i < output.length; ++i) {
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187 s += '<td class="mt-state"><pre>' + esc(output[i].state) + '</pre></td>';
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188 }
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189 }
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190 s += '</tr></table>';
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191 return s;
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192 }
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193 })();
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