[1.8.x] Replaced try..except blocks by context manager in custom lookups tests (6840aaf3) · Commits · Dom Sekotill / django

tests/custom_lookups/tests.py

+23 −47

Original line number	Diff line number	Diff line
		from __future__ import unicode_literals

		import contextlib
		import time
		import unittest
		from datetime import date, datetime
		@@ -12,6 +13,17 @@ from django.utils import timezone
		from .models import Author, MySQLUnixTimestamp


		@contextlib.contextmanager
		def register_lookup(field, *lookups):
		try:
		for lookup in lookups:
		field.register_lookup(lookup)
		yield
		finally:
		for lookup in lookups:
		field._unregister_lookup(lookup)


		class Div3Lookup(models.Lookup):
		lookup_name = 'div3'

		@@ -192,8 +204,7 @@ class LookupTests(TestCase):
		a2 = Author.objects.create(name='a2', age=2)
		a3 = Author.objects.create(name='a3', age=3)
		a4 = Author.objects.create(name='a4', age=4)
		models.IntegerField.register_lookup(Div3Lookup)
		try:
		with register_lookup(models.IntegerField, Div3Lookup):
		self.assertQuerysetEqual(
		Author.objects.filter(age__div3=0),
		[a3], lambda x: x
		@@ -210,8 +221,6 @@ class LookupTests(TestCase):
		Author.objects.filter(age__div3=3),
		[], lambda x: x
		)
		finally:
		models.IntegerField._unregister_lookup(Div3Lookup)

		@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific SQL used")
		def test_birthdate_month(self):
		@@ -219,8 +228,7 @@ class LookupTests(TestCase):
		a2 = Author.objects.create(name='a2', birthdate=date(2012, 2, 29))
		a3 = Author.objects.create(name='a3', birthdate=date(2012, 1, 31))
		a4 = Author.objects.create(name='a4', birthdate=date(2012, 3, 1))
		models.DateField.register_lookup(InMonth)
		try:
		with register_lookup(models.DateField, InMonth):
		self.assertQuerysetEqual(
		Author.objects.filter(birthdate__inmonth=date(2012, 1, 15)),
		[a3], lambda x: x
		@@ -241,12 +249,9 @@ class LookupTests(TestCase):
		Author.objects.filter(birthdate__inmonth=date(2012, 4, 1)),
		[], lambda x: x
		)
		finally:
		models.DateField._unregister_lookup(InMonth)

		def test_div3_extract(self):
		models.IntegerField.register_lookup(Div3Transform)
		try:
		with register_lookup(models.IntegerField, Div3Transform):
		a1 = Author.objects.create(name='a1', age=1)
		a2 = Author.objects.create(name='a2', age=2)
		a3 = Author.objects.create(name='a3', age=3)
		@@ -270,15 +275,12 @@ class LookupTests(TestCase):
		self.assertQuerysetEqual(
		baseqs.filter(age__div3__range=(1, 2)),
		[a1, a2, a4], lambda x: x)
		finally:
		models.IntegerField._unregister_lookup(Div3Transform)


		class BilateralTransformTests(TestCase):

		def test_bilateral_upper(self):
		models.CharField.register_lookup(UpperBilateralTransform)
		try:
		with register_lookup(models.CharField, UpperBilateralTransform):
		Author.objects.bulk_create([
		Author(name='Doe'),
		Author(name='doe'),
		@@ -290,20 +292,14 @@ class BilateralTransformTests(TestCase):
		self.assertQuerysetEqual(
		Author.objects.filter(name__upper__contains='f'),
		["<Author: Foo>"], ordered=False)
		finally:
		models.CharField._unregister_lookup(UpperBilateralTransform)

		def test_bilateral_inner_qs(self):
		models.CharField.register_lookup(UpperBilateralTransform)
		try:
		with register_lookup(models.CharField, UpperBilateralTransform):
		with self.assertRaises(NotImplementedError):
		Author.objects.filter(name__upper__in=Author.objects.values_list('name'))
		finally:
		models.CharField._unregister_lookup(UpperBilateralTransform)

		def test_div3_bilateral_extract(self):
		models.IntegerField.register_lookup(Div3BilateralTransform)
		try:
		with register_lookup(models.IntegerField, Div3BilateralTransform):
		a1 = Author.objects.create(name='a1', age=1)
		a2 = Author.objects.create(name='a2', age=2)
		a3 = Author.objects.create(name='a3', age=3)
		@@ -327,13 +323,9 @@ class BilateralTransformTests(TestCase):
		self.assertQuerysetEqual(
		baseqs.filter(age__div3__range=(1, 2)),
		[a1, a2, a4], lambda x: x)
		finally:
		models.IntegerField._unregister_lookup(Div3BilateralTransform)

		def test_bilateral_order(self):
		models.IntegerField.register_lookup(Mult3BilateralTransform)
		models.IntegerField.register_lookup(Div3BilateralTransform)
		try:
		with register_lookup(models.IntegerField, Mult3BilateralTransform, Div3BilateralTransform):
		a1 = Author.objects.create(name='a1', age=1)
		a2 = Author.objects.create(name='a2', age=2)
		a3 = Author.objects.create(name='a3', age=3)
		@@ -347,13 +339,9 @@ class BilateralTransformTests(TestCase):
		self.assertQuerysetEqual(
		baseqs.filter(age__div3__mult3=42),
		[a3], lambda x: x)
		finally:
		models.IntegerField._unregister_lookup(Mult3BilateralTransform)
		models.IntegerField._unregister_lookup(Div3BilateralTransform)

		def test_bilateral_fexpr(self):
		models.IntegerField.register_lookup(Mult3BilateralTransform)
		try:
		with register_lookup(models.IntegerField, Mult3BilateralTransform):
		a1 = Author.objects.create(name='a1', age=1, average_rating=3.2)
		a2 = Author.objects.create(name='a2', age=2, average_rating=0.5)
		a3 = Author.objects.create(name='a3', age=3, average_rating=1.5)
		@@ -366,23 +354,18 @@ class BilateralTransformTests(TestCase):
		# Same as age >= average_rating
		baseqs.filter(age__mult3__gte=models.F('average_rating')),
		[a2, a3], lambda x: x)
		finally:
		models.IntegerField._unregister_lookup(Mult3BilateralTransform)


		@override_settings(USE_TZ=True)
		class DateTimeLookupTests(TestCase):
		@unittest.skipUnless(connection.vendor == 'mysql', "MySQL specific SQL used")
		def test_datetime_output_field(self):
		models.PositiveIntegerField.register_lookup(DateTimeTransform)
		try:
		with register_lookup(models.PositiveIntegerField, DateTimeTransform):
		ut = MySQLUnixTimestamp.objects.create(timestamp=time.time())
		y2k = timezone.make_aware(datetime(2000, 1, 1))
		self.assertQuerysetEqual(
		MySQLUnixTimestamp.objects.filter(timestamp__as_datetime__gt=y2k),
		[ut], lambda x: x)
		finally:
		models.PositiveIntegerField._unregister_lookup(DateTimeTransform)


		class YearLteTests(TestCase):
		@@ -512,8 +495,7 @@ class TrackCallsYearTransform(YearTransform):

		class LookupTransformCallOrderTests(TestCase):
		def test_call_order(self):
		models.DateField.register_lookup(TrackCallsYearTransform)
		try:
		with register_lookup(models.DateField, TrackCallsYearTransform):
		# junk lookup - tries lookup, then transform, then fails
		with self.assertRaises(FieldError):
		Author.objects.filter(birthdate__year__junk=2012)
		@@ -536,9 +518,6 @@ class LookupTransformCallOrderTests(TestCase):
		self.assertEqual(TrackCallsYearTransform.call_order,
		['lookup'])

		finally:
		models.DateField._unregister_lookup(TrackCallsYearTransform)


		class CustomisedMethodsTests(TestCase):

		@@ -561,8 +540,7 @@ class CustomisedMethodsTests(TestCase):

		class SubqueryTransformTests(TestCase):
		def test_subquery_usage(self):
		models.IntegerField.register_lookup(Div3Transform)
		try:
		with register_lookup(models.IntegerField, Div3Transform):
		Author.objects.create(name='a1', age=1)
		a2 = Author.objects.create(name='a2', age=2)
		Author.objects.create(name='a3', age=3)
		@@ -570,5 +548,3 @@ class SubqueryTransformTests(TestCase):
		self.assertQuerysetEqual(
		Author.objects.order_by('name').filter(id__in=Author.objects.filter(age__div3=2)),
		[a2], lambda x: x)
		finally:
		models.IntegerField._unregister_lookup(Div3Transform)