added test for change

diff --git a/helm/matita/tests/change.ma b/helm/matita/tests/change.ma
new file mode 100644 (file)
index 0000000..ea894c2
--- /dev/null
+++ b/helm/matita/tests/change.ma
@@ -0,0 +1,29 @@
+(**************************************************************************)
+(*       ___                                                               *)
+(*      ||M||                                                             *)
+(*      ||A||       A project by Andrea Asperti                           *)
+(*      ||T||                                                             *)
+(*      ||I||       Developers:                                           *)
+(*      ||T||         The HELM team.                                      *)
+(*      ||A||         http://helm.cs.unibo.it                             *)
+(*      \   /                                                             *)
+(*       \ /        This file is distributed under the terms of the       *)
+(*        v         GNU General Public License Version 2                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+set "baseuri" "cic:/matita/tests/change/".
+alias num (instance 0) = "natural number".
+alias symbol "eq" (instance 0) = "leibnitz's equality".
+alias symbol "plus" (instance 0) = "natural plus".
+alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
+
+theorem stupid: 
+  \forall a:nat.
+  a = 5 \to 
+  (3 + 2) = a.
+intros.
+change in \vdash (? ? % ?) with 5.
+rewrite < H in \vdash (? ? % ?). 
+reflexivity.
+qed.
\ No newline at end of file