def test_can_add_predicates_and_find_corresponding_values(
mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
mapping.add(equals_bar, 'bar value')
assert mapping.find('foo') == 'foo value'
assert mapping.find('bar') == 'bar value'
def test_no_matching_predicates_should_raise_error(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
mapping.add(equals_bar, 'bar value')
with pytest.raises(ValueError,
match=r"No matching entries for 'baz' in registry"):
mapping.find('baz')
def test_can_remove_predicates_by_reference(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
assert mapping.find('foo') == 'foo value'
mapping.remove(equals_foo)
with pytest.raises(ValueError, match=r'No matching'):
mapping.find('foo')
def test_can_remove_predicates_by_reference(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
assert mapping.find('foo') == 'foo value'
mapping.remove(equals_foo)
with pytest.raises(ValueError, match=r'No matching'):
mapping.find('foo')
def test_removing_labeled_predicate_by_reference_also_removes_label(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
mapping.remove(equals_foo)
# Just a bit of white-box testing here
assert len(mapping._values) == 0
assert len(mapping._labeled_predicates) == 0
def test_can_remove_predicates_by_label_if_label_was_given(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
assert mapping.find('foo') == 'foo value'
mapping.remove('foo label')
with pytest.raises(ValueError, match=r'No matching'):
mapping.find('foo')
def test_can_remove_predicates_by_label_if_label_was_given(
mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
assert mapping.find('foo') == 'foo value'
mapping.remove('foo label')
with pytest.raises(ValueError, match=r'No matching'):
mapping.find('foo')
def test_removing_labeled_predicate_by_reference_also_removes_label(
mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
mapping.remove(equals_foo)
# Just a bit of white-box testing here
assert len(mapping._values) == 0
assert len(mapping._labeled_predicates) == 0
def test_multiple_matching_predicates_should_raise_error(mapping: PredicateMapping):
mapping.add(Equals('baz'), 'baz value')
mapping.add(functools.partial(operator.eq, 'baz'), 'baz value')
with pytest.raises(ValueError) as e:
mapping.find('baz')
e.match(r"Multiple matching entries for 'baz' in registry")
e.match(r"<Equals \(== 'baz'\)>")
e.match(r'functools\.partial')
def test_multiple_matching_predicates_should_raise_error(
mapping: PredicateMapping):
mapping.add(Equals('baz'), 'baz value')
mapping.add(functools.partial(operator.eq, 'baz'), 'baz value')
with pytest.raises(ValueError) as e:
mapping.find('baz')
e.match(r"Multiple matching entries for 'baz' in registry")
e.match(r"<Equals \(== 'baz'\)>")
e.match(r'functools\.partial')
def test_copying_copies_internal_mappings_but_not_predicates_or_values(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
c1 = mapping.copy()
c2 = copy.copy(mapping)
c3 = copy.deepcopy(mapping)
for x, y in itertools.combinations((mapping, c1, c2, c3), 2):
# Objects are different
assert id(x) != id(y)
# Names are the same
assert x._name == y._name
# Internal mapping objects are different
assert id(x._values) != id(y._values)
assert id(x._labeled_predicates) != id(y._labeled_predicates)
# Values for 'foo' can be found in both mappings
assert x.find('foo') == 'foo value'
assert y.find('foo') == 'foo value'
def test_copying_copies_internal_mappings_but_not_predicates_or_values(
mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'foo label')
c1 = mapping.copy()
c2 = copy.copy(mapping)
c3 = copy.deepcopy(mapping)
for x, y in itertools.combinations((mapping, c1, c2, c3), 2):
# Objects are different
assert id(x) != id(y)
# Names are the same
assert x._name == y._name
# Internal mapping objects are different
assert id(x._values) != id(y._values)
assert id(x._labeled_predicates) != id(y._labeled_predicates)
# Values for 'foo' can be found in both mappings
assert x.find('foo') == 'foo value'
assert y.find('foo') == 'foo value'
def test_cannot_add_same_predicate_twice(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
pattern = r'Matcher .* already exists in registry'
with pytest.raises(ValueError, match=pattern):
mapping.add(equals_foo, 'foo value')
def test_cannot_add_two_predicates_with_same_label(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'some label')
pattern = r"Matcher .* with label 'some label' already exists in registry"
with pytest.raises(ValueError, match=pattern):
mapping.add(equals_bar, 'bar value', 'some label')
def test_can_add_predicates_and_find_corresponding_values(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
mapping.add(equals_bar, 'bar value')
assert mapping.find('foo') == 'foo value'
assert mapping.find('bar') == 'bar value'
def test_no_matching_predicates_should_raise_error(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
mapping.add(equals_bar, 'bar value')
with pytest.raises(ValueError, match=r"No matching entries for 'baz' in registry"):
mapping.find('baz')
def test_cannot_add_two_predicates_with_same_label(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value', 'some label')
pattern = r"Matcher .* with label 'some label' already exists in registry"
with pytest.raises(ValueError, match=pattern):
mapping.add(equals_bar, 'bar value', 'some label')
def test_cannot_add_same_predicate_twice(mapping: PredicateMapping):
mapping.add(equals_foo, 'foo value')
pattern = r'Matcher .* already exists in registry'
with pytest.raises(ValueError, match=pattern):
mapping.add(equals_foo, 'foo value')