add compare

Author: nahtnam

lib/diffJSON.js

@@ -2,6 +2,32 @@ const sortArrays = require('./sortArrays');
 const detailedDiff = require('deep-object-diff').detailedDiff;
 const flatten = require('flat');
 
+const runCompare = (li, ri, comparison) => {
+  let left = li;
+  let right = ri;
+  const splitCompare = comparison.split('($)').filter(x => x);
+
+  for (const substr of splitCompare) { // eslint-disable-line
+    if (!substr.includes('*')) {
+      throw new Error('missing * in customCompare');
+    }
+    const [l, r] = substr.split('*');
+    const lm = left.substr(0, left.indexOf(l));
+    const rm = right.substr(0, right.indexOf(l));
+    if (lm !== rm) {
+      return false;
+    }
+    left = left.substr(left.indexOf(r));
+    right = right.substr(right.indexOf(r));
+  }
+
+  if (left !== right) {
+    return false;
+  }
+
+  return true;
+};
+
 module.exports = async (lj, rj, options, arr = []) => {
   const diffTable = arr;
   let leftJSON = sortArrays(lj, options);
@@ -60,6 +86,15 @@ module.exports = async (lj, rj, options, arr = []) => {
     if (ignore.includes(key)) return;
     const leftValue = leftFlatJSON[key];
     const rightValue = updated[key];
+    if (options.customDiff && options.customDiff[key]) {
+      const re = new RegExp(options.customDiff[key]);
+      if (re.test(leftValue) && re.test(rightValue)) {
+        return;
+      }
+    }
+    if (options.customCompare && options.customCompare[key]) {
+      if (runCompare(leftValue, rightValue, options.customCompare[key])) return;
+    }
     diffTable.push({
       key,
       left: leftValue,

lib/diffURLs.js

@@ -15,6 +15,8 @@ module.exports = async (leftURL, rightURL, opts) => {
   options.ignore = opts.ignore || [];
   options.skipcertificate = opts.skipcertificate || false;
   options.expectedStatusCode = opts.expectedStatusCode ? [opts.expectedStatusCode] : [200, 201, 202, 203, 204, 205, 206, 207, 208, 209];
+  options.customDiff = opts.customDiff || {};
+  options.customCompare = opts.customCompare || {};
 
   if (options.sortKey) {
     options.sortKeys.unshift(options.sortKey);