194 lines
6.9 KiB
JavaScript
Executable File
194 lines
6.9 KiB
JavaScript
Executable File
/**
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* Helper to test CodeMirror highlighting modes. It pretty prints output of the
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* highlighter and can check against expected styles.
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*
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* Mode tests are registered by calling test.mode(testName, mode,
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* tokens), where mode is a mode object as returned by
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* CodeMirror.getMode, and tokens is an array of lines that make up
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* the test.
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*
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* These lines are strings, in which styled stretches of code are
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* enclosed in brackets `[]`, and prefixed by their style. For
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* example, `[keyword if]`. Brackets in the code itself must be
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* duplicated to prevent them from being interpreted as token
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* boundaries. For example `a[[i]]` for `a[i]`. If a token has
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* multiple styles, the styles must be separated by ampersands, for
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* example `[tag&error </hmtl>]`.
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*
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* See the test.js files in the css, markdown, gfm, and stex mode
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* directories for examples.
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*/
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(function() {
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function findSingle(str, pos, ch) {
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for (;;) {
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var found = str.indexOf(ch, pos);
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if (found == -1) return null;
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if (str.charAt(found + 1) != ch) return found;
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pos = found + 2;
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}
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}
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var styleName = /[\w&-_]+/g;
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function parseTokens(strs) {
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var tokens = [], plain = "";
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for (var i = 0; i < strs.length; ++i) {
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if (i) plain += "\n";
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var str = strs[i], pos = 0;
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while (pos < str.length) {
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var style = null, text;
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if (str.charAt(pos) == "[" && str.charAt(pos+1) != "[") {
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styleName.lastIndex = pos + 1;
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var m = styleName.exec(str);
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style = m[0].replace(/&/g, " ");
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var textStart = pos + style.length + 2;
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var end = findSingle(str, textStart, "]");
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if (end == null) throw new Error("Unterminated token at " + pos + " in '" + str + "'" + style);
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text = str.slice(textStart, end);
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pos = end + 1;
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} else {
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var end = findSingle(str, pos, "[");
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if (end == null) end = str.length;
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text = str.slice(pos, end);
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pos = end;
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}
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text = text.replace(/\[\[|\]\]/g, function(s) {return s.charAt(0);});
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tokens.push({style: style, text: text});
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plain += text;
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}
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}
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return {tokens: tokens, plain: plain};
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}
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test.mode = function(name, mode, tokens, modeName) {
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var data = parseTokens(tokens);
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return test((modeName || mode.name) + "_" + name, function() {
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return compare(data.plain, data.tokens, mode);
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});
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};
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function esc(str) {
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return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
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}
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function compare(text, expected, mode) {
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var expectedOutput = [];
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for (var i = 0; i < expected.length; ++i) {
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var sty = expected[i].style;
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if (sty && sty.indexOf(" ")) sty = sty.split(' ').sort().join(' ');
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expectedOutput.push({style: sty, text: expected[i].text});
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}
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var observedOutput = highlight(text, mode);
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var s = "";
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var diff = highlightOutputsDifferent(expectedOutput, observedOutput);
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if (diff != null) {
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s += '<div class="mt-test mt-fail">';
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s += '<pre>' + esc(text) + '</pre>';
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s += '<div class="cm-s-default">';
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s += 'expected:';
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s += prettyPrintOutputTable(expectedOutput, diff);
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s += 'observed: [<a onclick="this.parentElement.className+=\' mt-state-unhide\'">display states</a>]';
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s += prettyPrintOutputTable(observedOutput, diff);
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s += '</div>';
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s += '</div>';
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}
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if (observedOutput.indentFailures) {
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for (var i = 0; i < observedOutput.indentFailures.length; i++)
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s += "<div class='mt-test mt-fail'>" + esc(observedOutput.indentFailures[i]) + "</div>";
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}
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if (s) throw new Failure(s);
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}
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function stringify(obj) {
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function replacer(key, obj) {
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if (typeof obj == "function") {
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var m = obj.toString().match(/function\s*[^\s(]*/);
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return m ? m[0] : "function";
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}
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return obj;
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}
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if (window.JSON && JSON.stringify)
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return JSON.stringify(obj, replacer, 2);
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return "[unsupported]"; // Fail safely if no native JSON.
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}
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function highlight(string, mode) {
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var state = mode.startState();
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var lines = string.replace(/\r\n/g,'\n').split('\n');
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var st = [], pos = 0;
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for (var i = 0; i < lines.length; ++i) {
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var line = lines[i], newLine = true;
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if (mode.indent) {
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var ws = line.match(/^\s*/)[0];
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var indent = mode.indent(state, line.slice(ws.length), line);
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if (indent != CodeMirror.Pass && indent != ws.length)
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(st.indentFailures || (st.indentFailures = [])).push(
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"Indentation of line " + (i + 1) + " is " + indent + " (expected " + ws.length + ")");
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}
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var stream = new CodeMirror.StringStream(line, 4, {
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lookAhead: function(n) { return lines[i + n] }
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});
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if (line == "" && mode.blankLine) mode.blankLine(state);
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/* Start copied code from CodeMirror.highlight */
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while (!stream.eol()) {
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for (var j = 0; j < 10 && stream.start >= stream.pos; j++)
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var compare = mode.token(stream, state);
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if (j == 10)
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throw new Failure("Failed to advance the stream." + stream.string + " " + stream.pos);
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var substr = stream.current();
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if (compare && compare.indexOf(" ") > -1) compare = compare.split(' ').sort().join(' ');
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stream.start = stream.pos;
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if (pos && st[pos-1].style == compare && !newLine) {
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st[pos-1].text += substr;
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} else if (substr) {
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st[pos++] = {style: compare, text: substr, state: stringify(state)};
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}
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// Give up when line is ridiculously long
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if (stream.pos > 5000) {
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st[pos++] = {style: null, text: this.text.slice(stream.pos)};
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break;
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}
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newLine = false;
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}
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}
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return st;
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}
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function highlightOutputsDifferent(o1, o2) {
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var minLen = Math.min(o1.length, o2.length);
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for (var i = 0; i < minLen; ++i)
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if (o1[i].style != o2[i].style || o1[i].text != o2[i].text) return i;
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if (o1.length > minLen || o2.length > minLen) return minLen;
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}
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function prettyPrintOutputTable(output, diffAt) {
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var s = '<table class="mt-output">';
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s += '<tr>';
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for (var i = 0; i < output.length; ++i) {
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var style = output[i].style, val = output[i].text;
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s +=
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'<td class="mt-token"' + (i == diffAt ? " style='background: pink'" : "") + '>' +
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'<span class="cm-' + esc(String(style)) + '">' +
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esc(val.replace(/ /g,'\xb7')) + // · MIDDLE DOT
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'</span>' +
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'</td>';
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}
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s += '</tr><tr>';
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for (var i = 0; i < output.length; ++i) {
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s += '<td class="mt-style"><span>' + (output[i].style || null) + '</span></td>';
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}
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if(output[0].state) {
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s += '</tr><tr class="mt-state-row" title="State AFTER each token">';
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for (var i = 0; i < output.length; ++i) {
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s += '<td class="mt-state"><pre>' + esc(output[i].state) + '</pre></td>';
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}
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}
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s += '</tr></table>';
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return s;
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}
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})();
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