Fixed comparison between URL objects

* Fixes #1866

src/core/base.js

@@ -161,6 +161,15 @@ getJasmineRequireObj().base = function(j$, jasmineGlobal) {
     );
   };
 
+  j$.isURL = function(obj) {
+    return (
+      obj !== null &&
+      typeof obj !== 'undefined' &&
+      typeof jasmineGlobal.URL !== 'undefined' &&
+      obj.constructor === jasmineGlobal.URL
+    );
+  };
+
   j$.isDataView = function(obj) {
     return (
       obj !== null &&

src/core/matchers/matchersUtil.js

@@ -475,6 +475,10 @@ getJasmineRequireObj().MatchersUtil = function(j$) {
         diffBuilder.recordMismatch();
         return false;
       }
+    } else if (j$.isURL(a) && j$.isURL(b)) {
+      // URLs have no enumrable properties, so the default object comparison
+      // would consider any two URLs to be equal.
+      return a.toString() === b.toString();
     } else {
       // Objects with different constructors are not equivalent, but `Object`s
       // or `Array`s from different frames are.