def test_some_false(self):
data = ['x', 'x', 'y']
result = _require_predicate_from_iterable(data, 'x')
self.assertEqual(list(result), [Invalid('y')])
data = [2, 2, 7]
result = _require_predicate_from_iterable(data, 2)
self.assertEqual(list(result), [Deviation(+5, 2)])
def test_raised_error(self):
"""Exceptions should raise as normal (earlier implementation
coerced errors to False).
"""
capital_letters = lambda x: x.isupper()
data = ['X', 'X', 10] # <- Fails on 30 (int has no 'isupper' method).
with self.assertRaises(AttributeError):
result = _require_predicate_from_iterable(data, capital_letters)
def test_duplicate_false(self):
"""Should return an error for every false result (incl. duplicates)."""
data = ['10', '20', 'XX', 'XX', 'XX'] # <- Multiple XX's.
result = _require_predicate_from_iterable(data, self.isdigit)
self.assertEqual(
list(result),
[Invalid('XX'), Invalid('XX'),
Invalid('XX')])
def test_duplicate_false(self):
"""Should return an error for every non-match (incl. duplicates)."""
data = iter(['a1', 'b2', 'XX', 'XX', 'XX']) # <- Multiple XX's.
result = _require_predicate_from_iterable(data, self.regex)
self.assertEqual(
list(result),
[Invalid('XX'), Invalid('XX'),
Invalid('XX')])
def test_returned_error(self):
"""When a difference is returned, it is used in place of Invalid."""
def func(x):
if x == 'c':
return Invalid("Letter 'c' is no good!")
return True
data = ['a', 'b', 'c']
result = _require_predicate_from_iterable(data, func)
self.assertEqual(list(result), [Invalid("Letter 'c' is no good!")])
def test_returned_error(self):
"""When a difference is returned, it should be used in place of
an auto-generated one.
"""
def func(x):
if x == 5:
return Invalid("Five is right out!")
return True
data = [1, 2, 5]
result = _require_predicate_from_iterable(data, func)
self.assertEqual(list(result), [Invalid("Five is right out!")])
def test_wildcard(self):
data = [('x', 'y'), ('x', 'x')]
result = _require_predicate_from_iterable(data, (Ellipsis, 'y'))
self.assertEqual(list(result), [Invalid(('x', 'x'))])
def test_some_false(self):
data = [('x', 'y'), ('x', 'x')]
result = _require_predicate_from_iterable(data, ('x', 'y'))
self.assertEqual(list(result), [Invalid(('x', 'x'))])
def test_all_true(self):
data = [('x', 'y'), ('x', 'y')]
result = _require_predicate_from_iterable(data, ('x', 'y'))
self.assertIsNone(result)
def test_notfound(self):
def func(x):
return False
result = _require_predicate_from_iterable(NOTFOUND, func)
self.assertEqual(result, Invalid(None))
def test_duplicate_false(self):
"""Should return an error for every false result (incl. duplicates)."""
data = ['x', 'x', 'y', 'y'] # <- Multiple invalid y's.
result = _require_predicate_from_iterable(data, 'x')
self.assertEqual(list(result), [Invalid('y'), Invalid('y')])
def test_notfound(self):
result = _require_predicate_from_iterable(NOTFOUND, self.regex)
self.assertEqual(result, Invalid(None))
def test_some_false(self):
data = iter(['a1', 'b2', 'XX'])
result = _require_predicate_from_iterable(data, self.regex)
self.assertEqual(list(result), [Invalid('XX')])
def test_all_true(self):
data = iter(['a1', 'b2', 'c3'])
result = _require_predicate_from_iterable(data, self.regex)
self.assertIsNone(result)
def test_some_false(self):
"""Elements that evaluate to False are returned as Invalid() errors."""
data = ['10', '20', 'XX']
result = _require_predicate_from_iterable(data, self.isdigit)
self.assertEqual(list(result), [Invalid('XX')])
def test_all_true(self):
data = ['10', '20', '30']
result = _require_predicate_from_iterable(data, self.isdigit)
self.assertIsNone(result)
