mirror of https://github.com/django/django.git
140 lines
5.4 KiB
Python
140 lines
5.4 KiB
Python
"""Tests for django.db.backends.utils"""
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from decimal import Decimal, Rounded
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from django.db import NotSupportedError, connection
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from django.db.backends.utils import (
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format_number,
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split_identifier,
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split_tzname_delta,
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truncate_name,
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)
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from django.test import (
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SimpleTestCase,
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TransactionTestCase,
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skipIfDBFeature,
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skipUnlessDBFeature,
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)
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class TestUtils(SimpleTestCase):
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def test_truncate_name(self):
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self.assertEqual(truncate_name("some_table", 10), "some_table")
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self.assertEqual(truncate_name("some_long_table", 10), "some_la38a")
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self.assertEqual(truncate_name("some_long_table", 10, 3), "some_loa38")
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self.assertEqual(truncate_name("some_long_table"), "some_long_table")
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# "user"."table" syntax
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self.assertEqual(
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truncate_name('username"."some_table', 10), 'username"."some_table'
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)
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self.assertEqual(
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truncate_name('username"."some_long_table', 10), 'username"."some_la38a'
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)
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self.assertEqual(
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truncate_name('username"."some_long_table', 10, 3), 'username"."some_loa38'
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)
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def test_split_identifier(self):
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self.assertEqual(split_identifier("some_table"), ("", "some_table"))
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self.assertEqual(split_identifier('"some_table"'), ("", "some_table"))
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self.assertEqual(
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split_identifier('namespace"."some_table'), ("namespace", "some_table")
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)
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self.assertEqual(
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split_identifier('"namespace"."some_table"'), ("namespace", "some_table")
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)
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def test_format_number(self):
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def equal(value, max_d, places, result):
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self.assertEqual(format_number(Decimal(value), max_d, places), result)
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equal("0", 12, 3, "0.000")
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equal("0", 12, 8, "0.00000000")
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equal("1", 12, 9, "1.000000000")
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equal("0.00000000", 12, 8, "0.00000000")
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equal("0.000000004", 12, 8, "0.00000000")
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equal("0.000000008", 12, 8, "0.00000001")
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equal("0.000000000000000000999", 10, 8, "0.00000000")
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equal("0.1234567890", 12, 10, "0.1234567890")
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equal("0.1234567890", 12, 9, "0.123456789")
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equal("0.1234567890", 12, 8, "0.12345679")
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equal("0.1234567890", 12, 5, "0.12346")
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equal("0.1234567890", 12, 3, "0.123")
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equal("0.1234567890", 12, 1, "0.1")
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equal("0.1234567890", 12, 0, "0")
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equal("0.1234567890", None, 0, "0")
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equal("1234567890.1234567890", None, 0, "1234567890")
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equal("1234567890.1234567890", None, 2, "1234567890.12")
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equal("0.1234", 5, None, "0.1234")
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equal("123.12", 5, None, "123.12")
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with self.assertRaises(Rounded):
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equal("0.1234567890", 5, None, "0.12346")
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with self.assertRaises(Rounded):
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equal("1234567890.1234", 5, None, "1234600000")
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def test_split_tzname_delta(self):
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tests = [
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("Asia/Ust+Nera", ("Asia/Ust+Nera", None, None)),
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("Asia/Ust-Nera", ("Asia/Ust-Nera", None, None)),
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("Asia/Ust+Nera-02:00", ("Asia/Ust+Nera", "-", "02:00")),
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("Asia/Ust-Nera+05:00", ("Asia/Ust-Nera", "+", "05:00")),
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("America/Coral_Harbour-01:00", ("America/Coral_Harbour", "-", "01:00")),
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("America/Coral_Harbour+02:30", ("America/Coral_Harbour", "+", "02:30")),
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("UTC+15:00", ("UTC", "+", "15:00")),
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("UTC-04:43", ("UTC", "-", "04:43")),
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("UTC", ("UTC", None, None)),
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("UTC+1", ("UTC+1", None, None)),
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]
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for tzname, expected in tests:
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with self.subTest(tzname=tzname):
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self.assertEqual(split_tzname_delta(tzname), expected)
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class CursorWrapperTests(TransactionTestCase):
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available_apps = []
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def _test_procedure(self, procedure_sql, params, param_types, kparams=None):
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with connection.cursor() as cursor:
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cursor.execute(procedure_sql)
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# Use a new cursor because in MySQL a procedure can't be used in the
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# same cursor in which it was created.
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with connection.cursor() as cursor:
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cursor.callproc("test_procedure", params, kparams)
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with connection.schema_editor() as editor:
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editor.remove_procedure("test_procedure", param_types)
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@skipUnlessDBFeature("create_test_procedure_without_params_sql")
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def test_callproc_without_params(self):
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self._test_procedure(
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connection.features.create_test_procedure_without_params_sql, [], []
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)
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@skipUnlessDBFeature("create_test_procedure_with_int_param_sql")
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def test_callproc_with_int_params(self):
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self._test_procedure(
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connection.features.create_test_procedure_with_int_param_sql,
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[1],
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["INTEGER"],
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)
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@skipUnlessDBFeature(
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"create_test_procedure_with_int_param_sql", "supports_callproc_kwargs"
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)
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def test_callproc_kparams(self):
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self._test_procedure(
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connection.features.create_test_procedure_with_int_param_sql,
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[],
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["INTEGER"],
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{"P_I": 1},
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)
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@skipIfDBFeature("supports_callproc_kwargs")
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def test_unsupported_callproc_kparams_raises_error(self):
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msg = (
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"Keyword parameters for callproc are not supported on this database "
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"backend."
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)
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with self.assertRaisesMessage(NotSupportedError, msg):
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with connection.cursor() as cursor:
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cursor.callproc("test_procedure", [], {"P_I": 1})
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