def test_validators(self):
"""Validators of ValidatedList are called correctly."""
def is_positive(value):
if value <= 0:
raise TypeError('value is not positive')
# The constructor should check all elements.
with pytest.raises(TypeError, match='value is not positive'):
ValidatedList([1, -2], validator=is_positive)
l = ValidatedList([1, 2, 3], validator=is_positive)
# __setitem__()
with pytest.raises(TypeError, match='value is not positive'):
l[2] = -1
with pytest.raises(TypeError, match='value is not positive'):
l[0:2] = [2, 3, -1]
# append()
with pytest.raises(TypeError, match='value is not positive'):
l.append(-4)
# extend() and __iadd__()
with pytest.raises(TypeError, match='value is not positive'):
l.extend([6, -1])
with pytest.raises(TypeError, match='value is not positive'):
l += [6, -1]
# insert()
with pytest.raises(TypeError, match='value is not positive'):
l.insert(1, -3)
def test_converters(self):
"""Custom converters of ValidatedList are called correctly."""
# All elements are converted on construction.
l = ValidatedList([1, 2.0, '3'], converter=int)
assert l == [1, 2, 3]
# __setitem__()
l[2] = '4'
assert l[2] == 4
l[0:3] = ['2', '3', 4]
assert l == [2, 3, 4]
# append()
l.append('5')
assert l[3] == 5
# extend() and __iadd__()
l.extend([6, '7'])
assert l[5] == 7
l += ['8', 9]
assert l[6] == 8
# insert()
l.insert(5, '10')
assert l[5] == 10
def test_converters(self):
"""Custom converters of ValidatedList are called correctly."""
# All elements are converted on construction.
l = ValidatedList([1, 2.0, "3"], converter=int)
assert l == [1, 2, 3]
# __setitem__()
l[2] = "4"
assert l[2] == 4
l[0:3] = ["2", "3", 4]
assert l == [2, 3, 4]
# append()
l.append("5")
assert l[3] == 5
# extend() and __iadd__()
l.extend([6, "7"])
assert l[5] == 7
l += ["8", 9]
assert l[6] == 8
# insert()
l.insert(5, "10")
assert l[5] == 10
def test_multiple_validators(self):
"""Multiple converters of ValidatedList are called in order."""
def is_positive(value):
if value <= 0:
raise TypeError('value must be positive')
def is_odd(value):
if value % 2 == 0:
raise TypeError('value must be odd')
with pytest.raises(TypeError, match='value must be positive'):
ValidatedList([-1, -3], validator=[is_positive, is_odd])
with pytest.raises(TypeError, match='value must be odd'):
ValidatedList([2, 4], validator=[is_positive, is_odd])
def test_validators_and_converters(self):
"""Custom converters of ValidatedList are called correctly."""
def is_positive(value):
if value <= 0:
raise TypeError('value is not positive')
# Validators are run after converters.
l = ValidatedList([1, 2, -3], converter=abs, validator=is_positive)
assert l == [1, 2, 3]
# __setitem__
l[2] = -1
assert l[2] == 1
with pytest.raises(TypeError, match='value is not positive'):
l[2] = 0
l[0:3] = [2, 3, -1]
assert l == [2, 3, 1]
with pytest.raises(TypeError, match='value is not positive'):
l[0:3] = [2, 3, 0]
# append()
l.append(-4)
assert l[-1] == 4
with pytest.raises(TypeError, match='value is not positive'):
l.append(0)
# extend() and __iadd__()
l.extend([6, -1])
assert l[-2:] == [6, 1]
with pytest.raises(TypeError, match='value is not positive'):
l.extend([6, 0])
l += [6, -2]
assert l[-2:] == [6, 2]
with pytest.raises(TypeError, match='value is not positive'):
l += [6, 0]
# insert()
l.insert(1, -3)
assert l[1] == 3
with pytest.raises(TypeError, match='value is not positive'):
l.insert(1, 0)
def test_slice(self):
"""A slice of a ValidatedList returns another ValidatedList."""
l = ValidatedList([1, 2, 3])
assert isinstance(l[:2], ValidatedList)
def test_copy(self):
"""A copy of a ValidatedList returns another ValidatedList."""
l = ValidatedList([1, 2, 3])
assert isinstance(l.copy(), ValidatedList)
assert isinstance(copy.copy(l), ValidatedList)
assert isinstance(copy.deepcopy(l), ValidatedList)
def test_multiple_converters(self):
"""Multiple converters of ValidatedList are called in order."""
l = ValidatedList([1, 2, -3], converter=[abs, str])
assert l == ['1', '2', '3']