JSON comparator added

index.js

@@ -14,7 +14,10 @@
       compare: require(libPrefix + '/compare'),
       XMLSerializer: require(libPrefix + '/canonizer'),
       revXPath: require(libPrefix + '/revxpath'),
-      GroupingReporter: require(libPrefix + '/reporters/groupingReporter.js')
+      GroupingReporter: require(libPrefix + '/reporters/groupingReporter.js'),
+      comparators: {
+         jsonComparator: require(libPrefix + '/comparators/jsonComparator.js')
+      }
    };
 
 })();

lib/comparators/jsonComparator.js

@@ -0,0 +1,43 @@
+var jsonDiff = require('rfc6902-json-diff');
+
+module.exports = function nodeValueJSONComparator(nodeNamesToCompare) {
+
+   function mustCompareNode(node) {
+      if (nodeNamesToCompare && nodeNamesToCompare.length) {
+         return nodeNamesToCompare.indexOf(node.nodeName) !== -1;
+      } else {
+         return true;
+      }
+   }
+
+   return function nodeValueJSONComparator(expected, actual) {
+
+      var
+         node = expected || actual,
+         eVal = expected && expected.nodeValue,
+         aVal = actual && actual.nodeValue,
+         result, diff;
+
+
+      if (mustCompareNode(node) && eVal && aVal) {
+         try {
+            eVal = eVal && JSON.parse(eVal);
+            aVal = aVal && JSON.parse(aVal);
+
+            diff = jsonDiff(aVal, eVal);
+
+            if (diff.length > 0) {
+               result = 'Attribute "config" differs. Expected:\n' + JSON.stringify(eVal, null, 2);
+               result += '\nActual:\n' + JSON.stringify(aVal, null, 2);
+               result += '\nDiff:\n' + JSON.stringify(diff, null, 2);
+
+               return result;
+            } else {
+               return true;
+            }
+         } catch (e) {
+            // ignore
+         }
+      }
+   };
+};

package.json

@@ -14,7 +14,8 @@
    "dependencies": {
       "argparse": "1.0.2",
       "tensor-xmldom": "0.1.18",
-      "colors": "0.6.2"
+      "colors": "0.6.2",
+      "rfc6902-json-diff": "0.1.x"
    },
    "devDependencies": {
       "istanbul": "0.3.8",