def test_register_for_none(self):
treaty = FactorGroup([
Statement(
predicate="$country1 signed a treaty with $country2",
terms=[Entity(name="UK"),
Entity(name="European Union")],
),
])
registers = list(
treaty.update_context_register(other=None,
context=ContextRegister(),
comparison=means))
assert len(registers) == 1
assert not registers[0] # empty register
def test_update_context_register_from_none(self):
left = FactorGroup([
Statement(
predicate="$shooter shot $victim",
terms=[Entity(name="Alice"),
Entity(name="Bob")],
)
])
right = FactorGroup([
Statement(
predicate="$shooter shot $victim",
terms=[Entity(name="Craig"),
Entity(name="Dan")],
)
])
update = left.update_context_register(
right,
context=None,
comparison=means,
)
explanation = next(update)
assert "!"