add js kernel_info request

IPython/html/static/services/kernels/js/kernel.js

@@ -242,6 +242,24 @@ var IPython = (function (IPython) {
         return msg.header.msg_id;
     };
 
+    /**
+     * Get kernel info
+     *
+     * @param callback {function}
+     * @method object_info
+     *
+     * When calling this method, pass a callback function that expects one argument.
+     * The callback will be passed the complete `kernel_info_reply` message documented
+     * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#kernel-info)
+     */
+    Kernel.prototype.kernel_info = function (callback) {
+        var callbacks;
+        if (callback) {
+            callbacks = { shell : { reply : callback } };
+        }
+        return this.send_shell_message("kernel_info_request", {}, callbacks);
+    };
+
     /**
      * Get info on an object
      *

IPython/html/tests/casperjs/test_cases/kernel_test.js

@@ -0,0 +1,28 @@
+
+//
+// Miscellaneous javascript tests
+//
+casper.notebook_test(function () {
+    this.evaluate(function () {
+        IPython.notebook.kernel.kernel_info(
+            function(msg){
+                    IPython._kernel_info_response = msg;
+            })
+    });
+
+    this.waitFor(
+        function () {
+            return this.evaluate(function(){
+                return IPython._kernel_info_response;
+        });
+    });
+
+    this.then(function () {
+        var kernel_info_response =  this.evaluate(function(){
+            return IPython._kernel_info_response;
+        });
+        this.test.assertTrue( kernel_info_response.msg_type === 'kernel_info_reply', 'Kernel info request return kernel_info_reply');
+        this.test.assertTrue( kernel_info_response.content !== undefined, 'Kernel_info_reply is not undefined');
+    });
+
+});