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import unittest
from django.core.management.color import no_style
from django.db import connection
from django.test import TestCase
from ..models import Person, Tag
@unittest.skipUnless(connection.vendor == "sqlite", "SQLite tests.")
class SQLiteOperationsTests(TestCase):
def test_sql_flush(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
),
[
'DELETE FROM "backends_person";',
'DELETE FROM "backends_tag";',
],
)
def test_sql_flush_allow_cascade(self):
statements = connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
allow_cascade=True,
)
self.assertEqual(
# The tables are processed in an unordered set.
sorted(statements),
[
'DELETE FROM "backends_person";',
'DELETE FROM "backends_tag";',
'DELETE FROM "backends_verylongmodelnamezzzzzzzzzzzzzzzzzzzzzz'
"zzzzzzzzzzzzzzzzzzzz_m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzz"
'zzzzzzzzzzzzzzzzzzzzzzz";',
],
)
def test_sql_flush_sequences(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
reset_sequences=True,
),
[
'DELETE FROM "backends_person";',
'DELETE FROM "backends_tag";',
'UPDATE "sqlite_sequence" SET "seq" = 0 WHERE "name" IN '
"('backends_person', 'backends_tag');",
],
)
def test_sql_flush_sequences_allow_cascade(self):
statements = connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
reset_sequences=True,
allow_cascade=True,
)
self.assertEqual(
# The tables are processed in an unordered set.
sorted(statements[:-1]),
[
'DELETE FROM "backends_person";',
'DELETE FROM "backends_tag";',
'DELETE FROM "backends_verylongmodelnamezzzzzzzzzzzzzzzzzzzzzz'
"zzzzzzzzzzzzzzzzzzzz_m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzz"
'zzzzzzzzzzzzzzzzzzzzzzz";',
],
)
self.assertIs(
statements[-1].startswith(
'UPDATE "sqlite_sequence" SET "seq" = 0 WHERE "name" IN ('
),
True,
)
self.assertIn("'backends_person'", statements[-1])
self.assertIn("'backends_tag'", statements[-1])
self.assertIn(
"'backends_verylongmodelnamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
"zzzz_m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
"zzz'",
statements[-1],
)
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