def test_party_list(num_cand, add_pref):
profile = Profile(num_cand)
profile.add_preferences(DichotomousPreferences([1, 3, 5], 3))
profile.add_preferences([0, 4, 6])
profile.add_preferences([0, 4, 6])
profile.add_preferences([2, 7])
profile.add_preferences(DichotomousPreferences([1, 3, 5], 3))
assert profile.party_list()
profile.add_preferences(add_pref)
assert not profile.party_list()
def test_unitweights(num_cand):
profile = Profile(num_cand)
profile.add_preferences([])
profile.add_preferences(DichotomousPreferences([0, 4, 5]))
profile.add_preferences([0, 4, 5])
p1 = DichotomousPreferences([0, 4, 5])
p2 = DichotomousPreferences([1, 2])
profile.add_preferences([p1, p2])
assert profile.has_unit_weights()
profile.add_preferences(DichotomousPreferences([0, 4, 5], 2.4))
assert not profile.has_unit_weights()
assert profile.totalweight() == 6.4
def test_iterate(num_cand):
profile = Profile(num_cand)
profile.add_preferences(DichotomousPreferences([1, 3, 5], 3))
profile.add_preferences([0, 4, 5])
assert len(profile) == 2
for p in profile:
assert isinstance(p, DichotomousPreferences)
def test_abcrules_weightsconsidered(rule_instance, verbose):
rule_id, algorithm, resolute = rule_instance
profile = Profile(3)
profile.add_preferences(DichotomousPreferences([0]))
profile.add_preferences(DichotomousPreferences([0]))
profile.add_preferences(DichotomousPreferences([1], 5))
profile.add_preferences(DichotomousPreferences([0]))
committeesize = 1
if (("monroe" in rule_id
or rule_id in ["lexmav", "rule-x", "phrag-enestr"])):
with pytest.raises(ValueError):
abcrules.compute(rule_id,
profile,
committeesize,
algorithm=algorithm,
verbose=verbose)
elif rule_id == "mav":
# Minimax AV ignores weights by definition
result = abcrules.compute(rule_id,
profile,
committeesize,
algorithm=algorithm,
resolute=resolute,
verbose=verbose)
if resolute:
assert result == [[0]]
else:
assert result == [[0], [1], [2]]
else:
result = abcrules.compute(rule_id,
profile,
committeesize,
algorithm=algorithm,
resolute=resolute,
verbose=verbose)
assert len(result) == 1
assert result[0] == [1]
def test_invalidprofiles(num_cand):
with pytest.raises(ValueError):
Profile(0)
with pytest.raises(ValueError):
Profile(-8)
with pytest.raises(ValueError):
Profile(4, ["a", "b", "c"])
Profile(4, ["a", 3, "b", "c"])
profile = Profile(num_cand, "abcdefgh")
pref = DichotomousPreferences([num_cand])
with pytest.raises(ValueError):
profile.add_preferences(pref)
with pytest.raises(TypeError):
profile.add_preferences([0, 4, 5, "1"])
with pytest.raises(TypeError):
profile.add_preferences(["1", 0, 4, 5])
with pytest.raises(TypeError):
profile.add_preferences({1: [1, 2]})
def test_invalidpreferences():
with pytest.raises(ValueError):
DichotomousPreferences([-1])
assert committees_pav == [[a, c]]
assert committees_seqpav == [[c, d]]
assert committees_revseqpav == [[c, d]]
print("\n")
print(misc.header(
"Example from Janson's survey (Example 13.3) / Thiele:", "*"))
# Approval profile
num_cand = 4
a, b, c, d = list(range(4)) # a = 0, b = 1, c = 2, ...
names = "abcd"
profile = Profile(num_cand, names=names)
profile.add_preferences(DichotomousPreferences([a, c, d], 960))
profile.add_preferences(DichotomousPreferences([b, c, d], 3000))
profile.add_preferences(DichotomousPreferences([b, c], 520))
profile.add_preferences(DichotomousPreferences([a, b], 1620))
profile.add_preferences(DichotomousPreferences([a, d], 1081))
profile.add_preferences(DichotomousPreferences([a, c], 1240))
profile.add_preferences(DichotomousPreferences([b, d], 360))
profile.add_preferences(DichotomousPreferences([d], 360))
profile.add_preferences(DichotomousPreferences([c], 120))
profile.add_preferences(DichotomousPreferences([b], 60))
print(misc.header("Input:"))
print(profile.str_compact())
committees_pav = abcrules.compute_pav(profile, 2, verbose=2)