Add JSON snippet tests for None
@@ -11,6 +11,7 @@ assert "1" == json.dumps(1)
assert "1.0" == json.dumps(1.0)
assert "true" == json.dumps(True)
assert "false" == json.dumps(False)
+assert 'null' == json.dumps(None)
assert '[]' == json.dumps([])
assert '[1]' == json.dumps([1])
