def test_KnowledgeEngine_reset_declare_initialfact():
from experta.engine import KnowledgeEngine
ke = KnowledgeEngine()
ke.reset()
assert len(ke.facts) == 1
def test_KnowledgeEngine_reset_resets_facts():
from experta.engine import KnowledgeEngine
ke = KnowledgeEngine()
ke.facts = None
ke.reset()
assert ke.facts is not None
def test_KnowledgeEngine_reset_resets_agenda():
from experta.engine import KnowledgeEngine
ke = KnowledgeEngine()
ke.agenda = None
ke.reset()
assert ke.agenda is not None
def test_double_underscore_raise_on_declare():
ke = KnowledgeEngine()
ke.reset()
ke.declare(Fact(__startwithdoubleunderscore__=True))
with pytest.raises(KeyError):
ke.declare(Fact(key__with__double__underscores=True))
def test_fact_setitem_do_raise_after_declare():
f = Fact()
ke = KnowledgeEngine()
ke.reset()
ke.declare(f)
with pytest.raises(RuntimeError):
f[0] = 1