From 152fa2301c55b6ce16309f7ca1241f1218279a81 Mon Sep 17 00:00:00 2001
From: Bertrand Benjamin <benjamin.bertrand@opytex.org>
Date: Fri, 28 Jun 2019 09:02:17 +0200
Subject: [PATCH] Test: add doctest for a bug about tree encapsulation

---
 mapytex/calculus/API/expression.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mapytex/calculus/API/expression.py b/mapytex/calculus/API/expression.py
index f11f0d9..70d79e2 100644
--- a/mapytex/calculus/API/expression.py
+++ b/mapytex/calculus/API/expression.py
@@ -99,6 +99,10 @@ class Expression(object):
         <Exp: -3 / -15>
         >>> Expression.random("{a}/{a*k} - 3*{b}", variables_scope={'a':{'min_max':(10, 30)}}) # doctest: +SKIP
         <Exp: 18 / 108 - 3 * 9>
+        >>> e = Expression.random("{a}*x + {b}*x + 3")
+        >>> ee = e.simplify()
+        >>> print(e) # doctest: +SKIP
+        >>> print(ee) # doctest: +SKIP
 
         """
         rd_t = Tree.from_str(template, random=True)