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# -*- coding: utf-8 -*-
from __future__ import absolute_import, print_function, division
import logging
import pytest
import petl as etl
from petl.transform.validation import validate
from petl.test.helpers import ieq
from petl.errors import FieldSelectionError
logger = logging.getLogger(__name__)
debug = logger.debug
def test_constraints():
constraints = [
dict(name='C1', field='foo', test=int),
dict(name='C2', field='bar', test=etl.dateparser('%Y-%m-%d')),
dict(name='C3', field='baz', assertion=lambda v: v in ['Y', 'N']),
dict(name='C4', assertion=lambda row: None not in row)
]
table = (('foo', 'bar', 'baz'),
(1, '2000-01-01', 'Y'),
('x', '2010-10-10', 'N'),
(2, '2000/01/01', 'Y'),
(3, '2015-12-12', 'x'),
(4, None, 'N'),
('y', '1999-99-99', 'z'))
expect = (('name', 'row', 'field', 'value', 'error'),
('C1', 2, 'foo', 'x', 'ValueError'),
('C2', 3, 'bar', '2000/01/01', 'ValueError'),
('C3', 4, 'baz', 'x', 'AssertionError'),
('C2', 5, 'bar', None, 'AttributeError'),
('C4', 5, None, None, 'AssertionError'),
('C1', 6, 'foo', 'y', 'ValueError'),
('C2', 6, 'bar', '1999-99-99', 'ValueError'),
('C3', 6, 'baz', 'z', 'AssertionError'))
actual = validate(table, constraints)
debug(actual)
ieq(expect, actual)
ieq(expect, actual)
def test_non_optional_constraint_with_missing_field():
constraints = [
dict(name='C1', field='foo', test=int),
]
table = (('bar', 'baz'),
('1999-99-99', 'z'))
actual = validate(table, constraints)
with pytest.raises(FieldSelectionError):
debug(actual)
def test_optional_constraint_with_missing_field():
constraints = [
dict(name='C1', field='foo', test=int, optional=True),
]
table = (('bar', 'baz'),
('1999-99-99', 'z'))
expect = (('name', 'row', 'field', 'value', 'error'),)
actual = validate(table, constraints)
debug(actual)
ieq(expect, actual)
def test_row_length():
table = (('foo', 'bar', 'baz'),
(1, '2000-01-01', 'Y'),
('x', '2010-10-10'),
(2, '2000/01/01', 'Y', True))
expect = (('name', 'row', 'field', 'value', 'error'),
('__len__', 2, None, 2, 'AssertionError'),
('__len__', 3, None, 4, 'AssertionError'))
actual = validate(table)
debug(actual)
ieq(expect, actual)
ieq(expect, actual)
def test_header():
header = ('foo', 'bar', 'baz')
table = (('foo', 'bar', 'bazzz'),
(1, '2000-01-01', 'Y'),
('x', '2010-10-10', 'N'))
expect = (('name', 'row', 'field', 'value', 'error'),
('__header__', 0, None, None, 'AssertionError'))
actual = validate(table, header=header)
debug(actual)
ieq(expect, actual)
ieq(expect, actual)
header = ('foo', 'bar', 'baz', 'quux')
table = (('foo', 'bar', 'baz'),
(1, '2000-01-01', 'Y'),
('x', '2010-10-10', 'N'))
expect = (('name', 'row', 'field', 'value', 'error'),
('__header__', 0, None, None, 'AssertionError'),
('__len__', 1, None, 3, 'AssertionError'),
('__len__', 2, None, 3, 'AssertionError'))
actual = validate(table, header=header)
debug(actual)
ieq(expect, actual)
ieq(expect, actual)
def test_validation_headerless():
header = ('foo', 'bar', 'baz')
table = []
# Expect only a missing header - no exceptions please
expect = (('name', 'row', 'field', 'value', 'error'),
('__header__', 0, None, None, 'AssertionError'))
actual = validate(table, header=header)
ieq(expect, actual)
ieq(expect, actual)
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