09e4ab74a1
Part of #471. * spot/twaalgos/emptiness.cc: Throw an exception if the cycle is rejecting. * spot/twaalgos/emptiness.hh: Document this behavior. * tests/python/except.py: Test it.
247 lines
6 KiB
Python
247 lines
6 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Copyright (C) 2018-2020 Laboratoire de Recherche et Développement de
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# l'Epita (LRDE).
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#
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# This file is part of Spot, a model checking library.
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#
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# Spot is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Spot is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test some function that must return exceptions on error. Doing
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# so is mostly a way to improve the coverage report.
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import spot
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import buddy
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def report_missing_exception():
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raise RuntimeError("missing exception")
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aut = spot.translate('GFa & GFb & GFc')
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aut.set_acceptance(spot.acc_cond("parity min even 4"))
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try:
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spot.iar(aut)
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except RuntimeError as e:
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assert 'iar() expects Rabin-like or Streett-like input' in str(e)
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else:
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report_missing_exception()
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alt = spot.dualize(spot.translate('FGa | FGb'))
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try:
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spot.tgba_determinize(alt)
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except RuntimeError as e:
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assert 'tgba_determinize() does not support alternation' in str(e)
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else:
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report_missing_exception()
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aut = spot.translate('a U b U c')
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aps = aut.ap()
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rem = spot.remove_ap()
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rem.add_ap('"a"=0,b')
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aut = rem.strip(aut)
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assert aut.ap() == aps[2:]
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try:
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rem.add_ap('"a=0,b')
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except ValueError as e:
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assert """missing closing '"'""" in str(e)
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else:
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report_missing_exception()
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try:
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rem.add_ap('a=0=b')
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except ValueError as e:
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assert """unexpected '=' at position 3""" in str(e)
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else:
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report_missing_exception()
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si = spot.scc_info(aut)
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for meth in ('scc_has_rejecting_cycle', 'is_inherently_weak_scc',
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'is_weak_scc', 'is_complete_scc', 'is_terminal_scc'):
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try:
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getattr(spot, meth)(si, 20)
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except ValueError as e:
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assert "invalid SCC number" in str(e)
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else:
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report_missing_exception()
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s1 = alt.new_state()
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s2 = alt.new_state()
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alt.new_edge(0, s1, buddy.bddtrue)
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alt.new_edge(s1, s2, buddy.bddtrue, [0])
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alt.new_edge(s2, s1, buddy.bddtrue)
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alt.prop_inherently_weak(False)
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alt.prop_state_acc(False)
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si = spot.scc_info(alt)
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try:
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si.determine_unknown_acceptance()
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except RuntimeError as e:
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assert "scc_info::determine_unknown_acceptance() does not supp" in str(e)
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else:
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report_missing_exception()
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try:
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alt.set_init_state(999)
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except ValueError as e:
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assert "set_init_state()" in str(e)
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else:
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report_missing_exception()
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alt.set_univ_init_state([s1, s2])
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u = alt.get_init_state_number()
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alt.set_init_state(u)
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try:
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alt.set_init_state(u - 1)
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except ValueError as e:
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assert "set_init_state()" in str(e)
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else:
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report_missing_exception()
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r = spot.twa_run(aut)
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try:
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a = r.as_twa()
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except RuntimeError as e:
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assert "empty cycle" in str(e)
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else:
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report_missing_exception()
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try:
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a = r.replay(spot.get_cout())
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except RuntimeError as e:
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assert "empty cycle" in str(e)
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else:
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report_missing_exception()
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try:
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a = r.reduce()
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except RuntimeError as e:
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assert "empty cycle" in str(e)
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else:
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report_missing_exception()
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a = spot.translate('Fa')
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a = spot.to_generalized_rabin(a, False)
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r = a.accepting_run()
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r = r.reduce()
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assert r.cycle[0].acc == spot.mark_t([1])
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r.cycle[0].acc = spot.mark_t([0])
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try:
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r.reduce();
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except RuntimeError as e:
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assert "expects an accepting cycle" in str(e)
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else:
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report_missing_exception()
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f = spot.formula('GF(a | Gb)')
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try:
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spot.gf_guarantee_to_ba(f, spot._bdd_dict)
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except RuntimeError as e:
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assert "guarantee" in str(e)
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else:
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report_missing_exception()
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f = spot.formula('FG(a | Fb)')
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try:
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spot.fg_safety_to_dca(f, spot._bdd_dict)
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except RuntimeError as e:
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assert "safety" in str(e)
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else:
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report_missing_exception()
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n = spot.mark_t.max_accsets()
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m = spot.mark_t([n - 1])
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try:
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m = spot.mark_t([0]) << n
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except RuntimeError as e:
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assert "Too many acceptance sets" in str(e)
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else:
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report_missing_exception()
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try:
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m.set(n)
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except RuntimeError as e:
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assert "bit index is out of bounds" in str(e)
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else:
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report_missing_exception()
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try:
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m = spot.mark_t([0, n, 1])
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except RuntimeError as e:
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assert "Too many acceptance sets used. The limit is" in str(e)
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else:
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report_missing_exception()
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try:
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spot.complement_semidet(spot.translate('Gb R a', 'ba'))
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except RuntimeError as e:
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assert "requires a semi-deterministic input" in str(e)
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else:
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report_missing_exception()
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try:
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spot.translate('F(G(a | !a) & ((b <-> c) W d))', 'det', 'any')
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except ValueError as e:
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s = str(e)
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assert 'det' in s
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assert 'any' in s
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else:
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report_missing_exception()
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a1 = spot.translate('FGa')
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a2 = spot.translate('Gb')
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assert not spot.is_deterministic(a1)
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assert spot.is_deterministic(a2)
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try:
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spot.product_xor(a1, a2)
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except RuntimeError as e:
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assert "product_xor() only works with deterministic automata" in str(e)
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else:
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report_missing_exception()
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try:
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spot.product_xor(a2, a1)
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except RuntimeError as e:
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assert "product_xor() only works with deterministic automata" in str(e)
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else:
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report_missing_exception()
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try:
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spot.product_xnor(a1, a2)
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except RuntimeError as e:
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assert "product_xnor() only works with deterministic automata" in str(e)
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else:
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report_missing_exception()
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try:
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spot.product_xnor(a2, a1)
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except RuntimeError as e:
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assert "product_xnor() only works with deterministic automata" in str(e)
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else:
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report_missing_exception()
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try:
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spot.solve_safety_game(a1)
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except RuntimeError as e:
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assert "solve_safety_game(): arena should have true acceptance" in str(e)
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else:
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report_missing_exception()
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try:
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spot.solve_parity_game(a1)
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except RuntimeError as e:
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assert "solve_parity_game(): arena must have max-odd acceptance condition" \
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in str(e)
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else:
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report_missing_exception()
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