extract code from test

test/src/util.js

@@ -0,0 +1,44 @@
+'use strict';
+var cheerio = require('cheerio');
+var fs = require('fs');
+
+/**
+ * @param {string} html
+ * @return {string}
+ */
+function normalizeHtml(html) {
+    return cheerio.load(html, {normalizeWhitespace: true}).html()
+        .replace(/>\s+/mg, '>')
+        .replace(/\s+</mg, '<')
+        .replace(/>\s+</mg, '><');
+}
+
+/**
+ * @param {*} t
+ * @param {string} actual
+ * @param {string} expected
+ * @param {string} filename
+ * @return {boolean} whether actual is equal to expected
+ */
+function compareAndWrite(t, actual, expected, filename) {
+    t.equal(actual, expected, filename);
+    if (actual !== expected) {
+        fs.writeFileSync(filename + '.actual.js', actual);
+        return false;
+    }
+    return true;
+}
+
+/**
+ * @param {string} filename
+ * @return {string}
+ */
+function readFileNormalized(filename) {
+    return fs.readFileSync(filename).toString().replace(/\r/g, '').trim();
+}
+
+module.exports = {
+    normalizeHtml: normalizeHtml,
+    compareAndWrite: compareAndWrite,
+    readFileNormalized: readFileNormalized
+};