def test_blocksworld_add():
lang = blocksworld.generate_small_fstrips_bw_language()
model = Model(lang)
clear = lang.get_predicate('clear')
b1 = lang.get_constant('b1')
b2 = lang.get_constant('b2')
model.add(clear, b1)
assert evaluate(clear(b1), model) is True
assert evaluate(clear(b2), model) is False
def test_blocksworld_set():
lang = blocksworld.generate_small_fstrips_bw_language()
model = Model(lang)
loc = lang.get_function('loc')
b1, table = (lang.get_constant(s) for s in ('b1', 'table'))
model.set(loc, b1, table)
assert evaluate(loc(b1), model) == table
def test_zero_ary_predicate_set():
L = tarski.language()
P = L.predicate('P')
M = Model(L)
M.add(P)
assert evaluate(P(), M) is True
def test_blocksworld_add_and_remove():
lang = tarski.benchmarks.blocksworld.generate_fstrips_bw_language()
model = Model(lang)
clear = lang.get_predicate('clear')
b1 = lang.get_constant('b1')
b2 = lang.get_constant('b2')
model.add(clear, b1)
model.add(clear, b2)
model.remove(clear, b1)
assert evaluate(clear(b1), model) is False
