def test_with_two_hypotheses(self):
t = z3.And(True)
f = z3.And(False)
a = z3.Int('a')
p = (a * a == 4)
r = (a == -2)
s = (a == 2)
assert causality_analyzer.explains_statement(t, p, r)
assert is_candidate_inference(t, p, r)
assert is_candidate_inference(t, p, s)
def test_with_two_hypotheses(self):
t = z3.And(True)
f = z3.And(False)
a = z3.Int('a')
p = (a * a == 4)
r = (a == -2)
s = (a == 2)
assert causality_analyzer.explains_statement(t, p, r)
assert is_candidate_inference(t, p, r)
assert is_candidate_inference(t, p, s)
def test_with_two_hypotheses_extra(self):
t = z3.And(True)
f = z3.And(False)
a = z3.Int('a')
p = (a * a == 4)
r = (a == -2)
s = (a == 2)
assert causality_analyzer.isnt_straight_up_false(t, p, r)
assert causality_analyzer.isnt_vacuously_true(t, p, r)
assert not is_candidate_inference(t, p, p)
assert not is_candidate_inference(t, p, t)
assert not is_candidate_inference(t, p, f)
assert not is_candidate_unique_inference(t, p, r)
assert not is_candidate_unique_inference(t, p, s)
def test_with_two_hypotheses_extra(self):
t = z3.And(True)
f = z3.And(False)
a = z3.Int('a')
p = (a * a == 4)
r = (a == -2)
s = (a == 2)
assert causality_analyzer.isnt_straight_up_false(t, p, r)
assert causality_analyzer.isnt_vacuously_true(t, p, r)
assert not is_candidate_inference(t, p, p)
assert not is_candidate_inference(t, p, t)
assert not is_candidate_inference(t, p, f)
assert not is_candidate_unique_inference(t, p, r)
assert not is_candidate_unique_inference(t, p, s)
def test_with_booleans(self):
t = z3.And(True)
f = z3.And(False)
assert not is_candidate_inference(t, t, t)
assert not is_candidate_inference(t, t, f)
assert not is_candidate_inference(t, f, t)
assert not is_candidate_inference(t, f, f)
assert not is_candidate_inference(f, t, t)
assert not is_candidate_inference(f, t, t)
assert not is_candidate_inference(f, f, t)
assert not is_candidate_inference(f, f, f)
def test_with_booleans(self):
t = z3.And(True)
f = z3.And(False)
assert not is_candidate_inference(t, t, t)
assert not is_candidate_inference(t, t, f)
assert not is_candidate_inference(t, f, t)
assert not is_candidate_inference(t, f, f)
assert not is_candidate_inference(f, t, t)
assert not is_candidate_inference(f, t, t)
assert not is_candidate_inference(f, f, t)
assert not is_candidate_inference(f, f, f)
