fix tests for ie7

test/main.js

@@ -53,4 +53,27 @@ require(["loader", jqurl], function(loader) {
           config.shim[tests[i+1]] = [tests[i]]; 
        }
     }
-});
+});
+
+
+// implement JSON.stringify serialization for IE7
+var JSON = JSON || {};
+JSON.stringify = JSON.stringify || function (obj) {
+    var t = typeof (obj);
+    if (t != "object" || obj === null) {
+        // simple data type
+        if (t == "string") obj = '"'+obj+'"';
+        return String(obj);
+    }
+    else {
+        // recurse array or object
+        var n, v, json = [], arr = (obj && obj.constructor == Array);
+        for (n in obj) {
+            v = obj[n]; t = typeof(v);
+            if (t == "string") v = '"'+v+'"';
+            else if (t == "object" && v !== null) v = JSON.stringify(v);
+            json.push((arr ? "" : '"' + n + '":') + String(v));
+        }
+        return (arr ? "[" : "{") + String(json) + (arr ? "]" : "}");
+    }
+};