add test sysinfo is jsonable

IPython/utils/tests/test_sysinfo.py

@@ -0,0 +1,17 b''
+# coding: utf-8
+"""Test suite for our sysinfo utilities."""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import json
+import nose.tools as nt
+
+from IPython.utils import sysinfo
+
+
+def test_json_getsysinfo():
+    """
+    test that it is easily jsonable and don't return bytes somewhere. 
+    """
+    json.dumps(sysinfo.get_sys_info())