tests: add a test for bdd_dict::assert_emptiness()

This improves the coverage for bdd_dict::assert_emptiness() and
bdd_dict::dump().

* tests/core/bdddict.cc, tests/core/bdddict.test: New files.
* tests/Makefile.am, tests/core/.gitignore: Adjust.

tests/Makefile.am

@@ -62,6 +62,7 @@ core/defs: $(top_builddir)/config.status $(srcdir)/core/defs.in
 # Keep this sorted alphabetically.
 check_PROGRAMS = \
   core/acc \
+  core/bdddict \
   core/bitvect \
   core/checkpsl \
   core/checkta \
@@ -100,6 +101,7 @@ check_PROGRAMS = \
 
 # Keep this sorted alphabetically.
 core_acc_SOURCES = core/acc.cc
+core_bdddict_SOURCES  = core/bdddict.cc
 core_bitvect_SOURCES  = core/bitvect.cc
 core_checkpsl_SOURCES = core/checkpsl.cc
 core_checkta_SOURCES = core/checkta.cc
@@ -204,6 +206,7 @@ TESTS_misc = \
 TESTS_twa = \
   core/acc.test \
   core/acc2.test \
+  core/bdddict.test \
   core/alternating.test \
   core/ltlcross3.test \
   core/taatgba.test \

tests/core/.gitignore

@@ -1,5 +1,6 @@
 acc
 apcollect
+bdddict
 bddprod
 bitvect
 blue_counter
@@ -45,6 +46,7 @@ nenoform
 ngraph
 output1
 output2
+parity
 parse_print
 powerset
 *.ps

tests/core/bdddict.cc

@@ -0,0 +1,31 @@
+// -*- coding: utf-8 -*-x
+// Copyright (C) 2017 Laboratoire de Recherche et
+// Développement de l'Epita (LRDE).
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <iostream>
+#include <spot/tl/parse.hh>
+#include <spot/twaalgos/translate.hh>
+
+int main()
+{
+  spot::formula f = spot::parse_formula("& & G p0 p1 p2");
+  spot::translator trans;
+  spot::twa_graph_ptr aut = trans.run(f);
+  aut->get_dict()->assert_emptiness(); // Should fail.
+  return 0;
+}

tests/core/bdddict.test

@@ -0,0 +1,29 @@
+#!/bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2017 Laboratoire de Recherche et Développement de
+# l'Epita (LRDE).
+#
+# This file is part of Spot, a model checking library.
+#
+# Spot is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Spot is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+# License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. ./defs
+set -e
+
+# Exercise bdd_dict::assert_emptiness()
+../bdddict 2>stderr && exit 1
+grep 'some maps are not empty' stderr
+grep 'Var\[p0\] x2' stderr
+grep 'Var\[p1\] x2' stderr
+grep 'Var\[p2\] x2' stderr