add better support of DOM nodes into equality matcher

src/core/matchers/matchersUtil.js

@@ -116,6 +116,31 @@ getJasmineRequireObj().matchersUtil = function(j$) {
           a.ignoreCase == b.ignoreCase;
     }
     if (typeof a != 'object' || typeof b != 'object') { return false; }
+    // we don't need to compare DOM nodes in node.js
+    var globalObject = typeof window == 'undefined' ? global : window;
+    if (globalObject.Node && globalObject.HTMLElement) {
+      var aIsDomNode = a instanceof Node;
+      var bIsDomNode = b instanceof Node;
+      if (aIsDomNode && bIsDomNode) {
+        // At first try to use DOM3 method isEqualNode
+        if (a.isEqualNode) {
+          return a.isEqualNode(b);
+        }
+        // IE8 doesn't support isEqualNode, try to use outerHTML && innerText
+        var aIsElement = a instanceof HTMLElement;
+        var bIsElement = b instanceof HTMLElement;
+        if (aIsElement && bIsElement) {
+          return a.outerHTML == b.outerHTML;
+        }
+        if (aIsElement || bIsElement) {
+          return false;
+        }
+        return a.innerText == b.innerText && a.textContent == b.textContent;
+      }
+      if (aIsDomNode || bIsDomNode) {
+        return false;
+      }
+    }
     // Assume equality for cyclic structures. The algorithm for detecting cyclic
     // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
     var length = aStack.length;