--- /dev/null
+/**
+ * Helper to test CodeMirror highlighting modes. It pretty prints output of the
+ * highlighter and can check against expected styles.
+ *
+ * Mode tests are registered by calling test.mode(testName, mode,
+ * tokens), where mode is a mode object as returned by
+ * CodeMirror.getMode, and tokens is an array of lines that make up
+ * the test.
+ *
+ * These lines are strings, in which styled stretches of code are
+ * enclosed in brackets `[]`, and prefixed by their style. For
+ * example, `[keyword if]`. Brackets in the code itself must be
+ * duplicated to prevent them from being interpreted as token
+ * boundaries. For example `a[[i]]` for `a[i]`. If a token has
+ * multiple styles, the styles must be separated by ampersands, for
+ * example `[tag&error </hmtl>]`.
+ *
+ * See the test.js files in the css, markdown, gfm, and stex mode
+ * directories for examples.
+ */
+(function() {
+ function findSingle(str, pos, ch) {
+ for (;;) {
+ var found = str.indexOf(ch, pos);
+ if (found == -1) return null;
+ if (str.charAt(found + 1) != ch) return found;
+ pos = found + 2;
+ }
+ }
+
+ var styleName = /[\w&-_]+/g;
+ function parseTokens(strs) {
+ var tokens = [], plain = "";
+ for (var i = 0; i < strs.length; ++i) {
+ if (i) plain += "\n";
+ var str = strs[i], pos = 0;
+ while (pos < str.length) {
+ var style = null, text;
+ if (str.charAt(pos) == "[" && str.charAt(pos+1) != "[") {
+ styleName.lastIndex = pos + 1;
+ var m = styleName.exec(str);
+ style = m[0].replace(/&/g, " ");
+ var textStart = pos + style.length + 2;
+ var end = findSingle(str, textStart, "]");
+ if (end == null) throw new Error("Unterminated token at " + pos + " in '" + str + "'" + style);
+ text = str.slice(textStart, end);
+ pos = end + 1;
+ } else {
+ var end = findSingle(str, pos, "[");
+ if (end == null) end = str.length;
+ text = str.slice(pos, end);
+ pos = end;
+ }
+ text = text.replace(/\[\[|\]\]/g, function(s) {return s.charAt(0);});
+ tokens.push(style, text);
+ plain += text;
+ }
+ }
+ return {tokens: tokens, plain: plain};
+ }
+
+ test.mode = function(name, mode, tokens, modeName) {
+ var data = parseTokens(tokens);
+ return test((modeName || mode.name) + "_" + name, function() {
+ return compare(data.plain, data.tokens, mode);
+ });
+ };
+
+ function compare(text, expected, mode) {
+
+ var expectedOutput = [];
+ for (var i = 0; i < expected.length; i += 2) {
+ var sty = expected[i];
+ if (sty && sty.indexOf(" ")) sty = sty.split(' ').sort().join(' ');
+ expectedOutput.push(sty, expected[i + 1]);
+ }
+
+ var observedOutput = highlight(text, mode);
+
+ var pass, passStyle = "";
+ pass = highlightOutputsEqual(expectedOutput, observedOutput);
+ passStyle = pass ? 'mt-pass' : 'mt-fail';
+
+ var s = '';
+ if (pass) {
+ s += '<div class="mt-test ' + passStyle + '">';
+ s += '<pre>' + text.replace('&', '&').replace('<', '<') + '</pre>';
+ s += '<div class="cm-s-default">';
+ s += prettyPrintOutputTable(observedOutput);
+ s += '</div>';
+ s += '</div>';
+ return s;
+ } else {
+ s += '<div class="mt-test ' + passStyle + '">';
+ s += '<pre>' + text.replace('&', '&').replace('<', '<') + '</pre>';
+ s += '<div class="cm-s-default">';
+ s += 'expected:';
+ s += prettyPrintOutputTable(expectedOutput);
+ s += 'observed:';
+ s += prettyPrintOutputTable(observedOutput);
+ s += '</div>';
+ s += '</div>';
+ throw s;
+ }
+ }
+
+ /**
+ * Emulation of CodeMirror's internal highlight routine for testing. Multi-line
+ * input is supported.
+ *
+ * @param string to highlight
+ *
+ * @param mode the mode that will do the actual highlighting
+ *
+ * @return array of [style, token] pairs
+ */
+ function highlight(string, mode) {
+ var state = mode.startState()
+
+ var lines = string.replace(/\r\n/g,'\n').split('\n');
+ var st = [], pos = 0;
+ for (var i = 0; i < lines.length; ++i) {
+ var line = lines[i], newLine = true;
+ var stream = new CodeMirror.StringStream(line);
+ if (line == "" && mode.blankLine) mode.blankLine(state);
+ /* Start copied code from CodeMirror.highlight */
+ while (!stream.eol()) {
+ var style = mode.token(stream, state), substr = stream.current();
+ if (style && style.indexOf(" ") > -1) style = style.split(' ').sort().join(' ');
+
+ stream.start = stream.pos;
+ if (pos && st[pos-2] == style && !newLine) {
+ st[pos-1] += substr;
+ } else if (substr) {
+ st[pos++] = style; st[pos++] = substr;
+ }
+ // Give up when line is ridiculously long
+ if (stream.pos > 5000) {
+ st[pos++] = null; st[pos++] = this.text.slice(stream.pos);
+ break;
+ }
+ newLine = false;
+ }
+ }
+
+ return st;
+ }
+
+ /**
+ * Compare two arrays of output from highlight.
+ *
+ * @param o1 array of [style, token] pairs
+ *
+ * @param o2 array of [style, token] pairs
+ *
+ * @return boolean; true iff outputs equal
+ */
+ function highlightOutputsEqual(o1, o2) {
+ if (o1.length != o2.length) return false;
+ for (var i = 0; i < o1.length; ++i)
+ if (o1[i] != o2[i]) return false;
+ return true;
+ }
+
+ /**
+ * Print tokens and corresponding styles in a table. Spaces in the token are
+ * replaced with 'interpunct' dots (·).
+ *
+ * @param output array of [style, token] pairs
+ *
+ * @return html string
+ */
+ function prettyPrintOutputTable(output) {
+ var s = '<table class="mt-output">';
+ s += '<tr>';
+ for (var i = 0; i < output.length; i += 2) {
+ var style = output[i], val = output[i+1];
+ s +=
+ '<td class="mt-token">' +
+ '<span class="cm-' + String(style).replace(/ +/g, " cm-") + '">' +
+ val.replace(/ /g,'\xb7').replace('&', '&').replace('<', '<') +
+ '</span>' +
+ '</td>';
+ }
+ s += '</tr><tr>';
+ for (var i = 0; i < output.length; i += 2) {
+ s += '<td class="mt-style"><span>' + (output[i] || null) + '</span></td>';
+ }
+ s += '</table>';
+ return s;
+ }
+})();
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