mirror of
https://github.com/django/django.git
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354 lines
16 KiB
Python
354 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import datetime
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import math
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import os
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import re
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import tokenize
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import unittest
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import warnings
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from django.core.validators import RegexValidator, EmailValidator
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from django.db import models, migrations
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from django.db.migrations.writer import MigrationWriter, SettingsReference
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from django.test import TestCase
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from django.conf import settings
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from django.utils import datetime_safe, six
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from django.utils.deconstruct import deconstructible
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from django.utils.translation import ugettext_lazy as _
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from django.utils.timezone import get_default_timezone, utc, FixedOffset
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import custom_migration_operations.operations
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import custom_migration_operations.more_operations
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class TestModel1(object):
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def upload_to(self):
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return "somewhere dynamic"
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thing = models.FileField(upload_to=upload_to)
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class WriterTests(TestCase):
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"""
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Tests the migration writer (makes migration files from Migration instances)
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"""
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def safe_exec(self, string, value=None):
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l = {}
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try:
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exec(string, globals(), l)
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except Exception as e:
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if value:
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self.fail("Could not exec %r (from value %r): %s" % (string.strip(), value, e))
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else:
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self.fail("Could not exec %r: %s" % (string.strip(), e))
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return l
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def serialize_round_trip(self, value):
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string, imports = MigrationWriter.serialize(value)
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return self.safe_exec("%s\ntest_value_result = %s" % ("\n".join(imports), string), value)['test_value_result']
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def assertSerializedEqual(self, value):
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self.assertEqual(self.serialize_round_trip(value), value)
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def assertSerializedResultEqual(self, value, target):
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self.assertEqual(MigrationWriter.serialize(value), target)
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def assertSerializedFieldEqual(self, value):
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new_value = self.serialize_round_trip(value)
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self.assertEqual(value.__class__, new_value.__class__)
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self.assertEqual(value.max_length, new_value.max_length)
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self.assertEqual(value.null, new_value.null)
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self.assertEqual(value.unique, new_value.unique)
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def test_serialize(self):
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"""
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Tests various different forms of the serializer.
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This does not care about formatting, just that the parsed result is
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correct, so we always exec() the result and check that.
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"""
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# Basic values
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self.assertSerializedEqual(1)
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self.assertSerializedEqual(1.2)
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self.assertTrue(math.isinf(self.serialize_round_trip(float("inf"))))
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self.assertTrue(math.isinf(self.serialize_round_trip(float("-inf"))))
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self.assertTrue(math.isnan(self.serialize_round_trip(float("nan"))))
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self.assertSerializedEqual(None)
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self.assertSerializedEqual(b"foobar")
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string, imports = MigrationWriter.serialize(b"foobar")
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self.assertEqual(string, "b'foobar'")
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self.assertSerializedEqual("föobár")
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string, imports = MigrationWriter.serialize("foobar")
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self.assertEqual(string, "'foobar'")
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self.assertSerializedEqual({1: 2})
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self.assertSerializedEqual(["a", 2, True, None])
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self.assertSerializedEqual({2, 3, "eighty"})
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self.assertSerializedEqual({"lalalala": ["yeah", "no", "maybe"]})
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self.assertSerializedEqual(_('Hello'))
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# Builtins
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self.assertSerializedEqual([list, tuple, dict, set])
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string, imports = MigrationWriter.serialize([list, tuple, dict, set])
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self.assertEqual(string, "[list, tuple, dict, set]")
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self.assertEqual(imports, set())
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# Functions
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with six.assertRaisesRegex(self, ValueError, 'Cannot serialize function: lambda'):
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self.assertSerializedEqual(lambda x: 42)
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self.assertSerializedEqual(models.SET_NULL)
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string, imports = MigrationWriter.serialize(models.SET(42))
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self.assertEqual(string, 'models.SET(42)')
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self.serialize_round_trip(models.SET(42))
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# Datetime stuff
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self.assertSerializedEqual(datetime.datetime.utcnow())
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self.assertSerializedEqual(datetime.datetime.utcnow)
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self.assertSerializedEqual(datetime.datetime.today())
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self.assertSerializedEqual(datetime.datetime.today)
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self.assertSerializedEqual(datetime.date.today())
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self.assertSerializedEqual(datetime.date.today)
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self.assertSerializedEqual(datetime.datetime.now().time())
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self.assertSerializedEqual(datetime.datetime(2014, 1, 1, 1, 1, tzinfo=get_default_timezone()))
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self.assertSerializedEqual(datetime.datetime(2014, 1, 1, 1, 1, tzinfo=FixedOffset(180)))
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safe_date = datetime_safe.date(2014, 3, 31)
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string, imports = MigrationWriter.serialize(safe_date)
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self.assertEqual(string, repr(datetime.date(2014, 3, 31)))
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self.assertEqual(imports, {'import datetime'})
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safe_datetime = datetime_safe.datetime(2014, 3, 31, 16, 4, 31)
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string, imports = MigrationWriter.serialize(safe_datetime)
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self.assertEqual(string, repr(datetime.datetime(2014, 3, 31, 16, 4, 31)))
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self.assertEqual(imports, {'import datetime'})
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timezone_aware_datetime = datetime.datetime(2012, 1, 1, 1, 1, tzinfo=utc)
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string, imports = MigrationWriter.serialize(timezone_aware_datetime)
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self.assertEqual(string, "datetime.datetime(2012, 1, 1, 1, 1, tzinfo=utc)")
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self.assertEqual(imports, {'import datetime', 'from django.utils.timezone import utc'})
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# Django fields
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self.assertSerializedFieldEqual(models.CharField(max_length=255))
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self.assertSerializedFieldEqual(models.TextField(null=True, blank=True))
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# Setting references
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self.assertSerializedEqual(SettingsReference(settings.AUTH_USER_MODEL, "AUTH_USER_MODEL"))
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self.assertSerializedResultEqual(
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SettingsReference("someapp.model", "AUTH_USER_MODEL"),
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(
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"settings.AUTH_USER_MODEL",
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{"from django.conf import settings"},
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)
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)
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self.assertSerializedResultEqual(
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((x, x * x) for x in range(3)),
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(
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"((0, 0), (1, 1), (2, 4))",
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set(),
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)
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)
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def test_serialize_compiled_regex(self):
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"""
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Make sure compiled regex can be serialized.
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"""
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regex = re.compile(r'^\w+$', re.U)
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self.assertSerializedEqual(regex)
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def test_serialize_class_based_validators(self):
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"""
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Ticket #22943: Test serialization of class-based validators, including
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compiled regexes.
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"""
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validator = RegexValidator(message="hello")
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "django.core.validators.RegexValidator(message='hello')")
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self.serialize_round_trip(validator)
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# Test with a compiled regex.
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validator = RegexValidator(regex=re.compile(r'^\w+$', re.U))
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "django.core.validators.RegexValidator(regex=re.compile('^\\\\w+$', 32))")
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self.serialize_round_trip(validator)
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# Test a string regex with flag
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validator = RegexValidator(r'^[0-9]+$', flags=re.U)
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "django.core.validators.RegexValidator('^[0-9]+$', flags=32)")
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self.serialize_round_trip(validator)
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# Test message and code
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validator = RegexValidator('^[-a-zA-Z0-9_]+$', 'Invalid', 'invalid')
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "django.core.validators.RegexValidator('^[-a-zA-Z0-9_]+$', 'Invalid', 'invalid')")
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self.serialize_round_trip(validator)
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# Test with a subclass.
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validator = EmailValidator(message="hello")
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "django.core.validators.EmailValidator(message='hello')")
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self.serialize_round_trip(validator)
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validator = deconstructible(path="migrations.test_writer.EmailValidator")(EmailValidator)(message="hello")
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string = MigrationWriter.serialize(validator)[0]
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self.assertEqual(string, "migrations.test_writer.EmailValidator(message='hello')")
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validator = deconstructible(path="custom.EmailValidator")(EmailValidator)(message="hello")
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with six.assertRaisesRegex(self, ImportError, "No module named '?custom'?"):
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MigrationWriter.serialize(validator)
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validator = deconstructible(path="django.core.validators.EmailValidator2")(EmailValidator)(message="hello")
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with self.assertRaisesMessage(ValueError, "Could not find object EmailValidator2 in django.core.validators."):
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MigrationWriter.serialize(validator)
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def test_serialize_empty_nonempty_tuple(self):
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"""
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Ticket #22679: makemigrations generates invalid code for (an empty
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tuple) default_permissions = ()
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"""
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empty_tuple = ()
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one_item_tuple = ('a',)
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many_items_tuple = ('a', 'b', 'c')
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self.assertSerializedEqual(empty_tuple)
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self.assertSerializedEqual(one_item_tuple)
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self.assertSerializedEqual(many_items_tuple)
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@unittest.skipUnless(six.PY2, "Only applies on Python 2")
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def test_serialize_direct_function_reference(self):
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"""
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Ticket #22436: You cannot use a function straight from its body
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(e.g. define the method and use it in the same body)
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"""
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with self.assertRaises(ValueError):
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self.serialize_round_trip(TestModel1.thing)
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def test_serialize_local_function_reference(self):
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"""
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Neither py2 or py3 can serialize a reference in a local scope.
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"""
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class TestModel2(object):
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def upload_to(self):
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return "somewhere dynamic"
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thing = models.FileField(upload_to=upload_to)
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with self.assertRaises(ValueError):
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self.serialize_round_trip(TestModel2.thing)
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def test_serialize_local_function_reference_message(self):
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"""
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Make sure user is seeing which module/function is the issue
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"""
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class TestModel2(object):
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def upload_to(self):
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return "somewhere dynamic"
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thing = models.FileField(upload_to=upload_to)
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with six.assertRaisesRegex(self, ValueError,
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'^Could not find function upload_to in migrations.test_writer'):
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self.serialize_round_trip(TestModel2.thing)
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def test_simple_migration(self):
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"""
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Tests serializing a simple migration.
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"""
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fields = {
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'charfield': models.DateTimeField(default=datetime.datetime.utcnow),
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'datetimefield': models.DateTimeField(default=datetime.datetime.utcnow),
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}
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options = {
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'verbose_name': 'My model',
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'verbose_name_plural': 'My models',
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}
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migration = type(str("Migration"), (migrations.Migration,), {
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"operations": [
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migrations.CreateModel("MyModel", tuple(fields.items()), options, (models.Model,)),
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migrations.CreateModel("MyModel2", tuple(fields.items()), bases=(models.Model,)),
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migrations.CreateModel(name="MyModel3", fields=tuple(fields.items()), options=options, bases=(models.Model,)),
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migrations.DeleteModel("MyModel"),
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migrations.AddField("OtherModel", "datetimefield", fields["datetimefield"]),
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],
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"dependencies": [("testapp", "some_other_one")],
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})
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writer = MigrationWriter(migration)
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output = writer.as_string()
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# It should NOT be unicode.
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self.assertIsInstance(output, six.binary_type, "Migration as_string returned unicode")
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# We don't test the output formatting - that's too fragile.
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# Just make sure it runs for now, and that things look alright.
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result = self.safe_exec(output)
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self.assertIn("Migration", result)
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# In order to preserve compatibility with Python 3.2 unicode literals
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# prefix shouldn't be added to strings.
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tokens = tokenize.generate_tokens(six.StringIO(str(output)).readline)
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for token_type, token_source, (srow, scol), __, line in tokens:
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if token_type == tokenize.STRING:
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self.assertFalse(
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token_source.startswith('u'),
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"Unicode literal prefix found at %d:%d: %r" % (
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srow, scol, line.strip()
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)
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)
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def test_migration_path(self):
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test_apps = [
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'migrations.migrations_test_apps.normal',
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'migrations.migrations_test_apps.with_package_model',
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'migrations.migrations_test_apps.without_init_file',
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]
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base_dir = os.path.dirname(os.path.dirname(__file__))
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for app in test_apps:
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with self.modify_settings(INSTALLED_APPS={'append': app}):
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migration = migrations.Migration('0001_initial', app.split('.')[-1])
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expected_path = os.path.join(base_dir, *(app.split('.') + ['migrations', '0001_initial.py']))
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writer = MigrationWriter(migration)
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# Silence warning on Python 2: Not importing directory
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# 'tests/migrations/migrations_test_apps/without_init_file/migrations':
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# missing __init__.py
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with warnings.catch_warnings():
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warnings.filterwarnings("ignore", category=ImportWarning)
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self.assertEqual(writer.path, expected_path)
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def test_custom_operation(self):
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migration = type(str("Migration"), (migrations.Migration,), {
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"operations": [
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custom_migration_operations.operations.TestOperation(),
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custom_migration_operations.operations.CreateModel(),
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migrations.CreateModel("MyModel", (), {}, (models.Model,)),
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custom_migration_operations.more_operations.TestOperation()
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],
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"dependencies": []
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})
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writer = MigrationWriter(migration)
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output = writer.as_string()
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result = self.safe_exec(output)
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self.assertIn("custom_migration_operations", result)
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self.assertNotEqual(
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result['custom_migration_operations'].operations.TestOperation,
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result['custom_migration_operations'].more_operations.TestOperation
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)
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def test_serialize_datetime(self):
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"""
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#23365 -- Timezone-aware datetimes should be allowed.
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"""
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# naive datetime
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naive_datetime = datetime.datetime(2014, 1, 1, 1, 1)
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self.assertEqual(MigrationWriter.serialize_datetime(naive_datetime),
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"datetime.datetime(2014, 1, 1, 1, 1)")
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# datetime with utc timezone
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utc_datetime = datetime.datetime(2014, 1, 1, 1, 1, tzinfo=utc)
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self.assertEqual(MigrationWriter.serialize_datetime(utc_datetime),
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"datetime.datetime(2014, 1, 1, 1, 1, tzinfo=utc)")
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# datetime with FixedOffset tzinfo
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fixed_offset_datetime = datetime.datetime(2014, 1, 1, 1, 1, tzinfo=FixedOffset(180))
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self.assertEqual(MigrationWriter.serialize_datetime(fixed_offset_datetime),
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"datetime.datetime(2013, 12, 31, 22, 1, tzinfo=utc)")
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def test_deconstruct_class_arguments(self):
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# Yes, it doesn't make sense to use a class as a default for a
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# CharField. It does make sense for custom fields though, for example
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# an enumfield that takes the enum class as an argument.
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class DeconstructableInstances(object):
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def deconstruct(self):
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return ('DeconstructableInstances', [], {})
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string = MigrationWriter.serialize(models.CharField(default=DeconstructableInstances))[0]
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self.assertEqual(string, "models.CharField(default=migrations.test_writer.DeconstructableInstances)")
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